110359009: Intellectual disability (disorder)

SNOMED CT Concept\Clinical finding (finding)\...

\Mental state, behavior and/or psychosocial function finding (finding)\Behavior finding\Intellectual disability

\Functional finding\Cognitive function finding (finding)\Impaired cognition (finding)\Intellectual disability
\Functional finding\Cognitive function finding (finding)\Intellectual ability - finding\Intellectual disability
\Functional finding\Intelligence finding\Intellectual ability - finding\Intellectual disability

\Disease\Developmental disorder\Neurodevelopmental disorder is a behavioral and cognitive disorder with onset during the developmental period that involves impaired or aberrant development of intellectual, motor, or social functions.\Intellectual disability

Status: current, Sufficiently defined by necessary conditions definition status (core metadata concept). Date: 31-Aug 2022. Module: SNOMED CT core

Descriptions:

Expanded Value Set

Outbound Relationships	Type	Target	Active	Characteristic	Refinability	Group	Values
Intellectual disability	Is a	Developmental mental disorder (disorder)	false	Inferred relationship	Some
Intellectual disability	Pathological process (attribute)	Pathological developmental process	true	Inferred relationship	Some	1
Intellectual disability	Interprets	Intellectual ability	true	Inferred relationship	Some	2
Intellectual disability	Has interpretation	Impaired	true	Inferred relationship	Some	2
Intellectual disability	Is a	Impaired cognition (finding)	true	Inferred relationship	Some
Intellectual disability	Interprets	Adaptation behavior (observable entity)	true	Inferred relationship	Some	3
Intellectual disability	Has interpretation	Impaired	true	Inferred relationship	Some	3
Intellectual disability	Is a	Behavior finding	true	Inferred relationship	Some
Intellectual disability	Is a	Intellectual ability - finding	true	Inferred relationship	Some
Intellectual disability	Is a	Neurodevelopmental disorder is a behavioral and cognitive disorder with onset during the developmental period that involves impaired or aberrant development of intellectual, motor, or social functions.	true	Inferred relationship	Some

Inbound Relationships	Type	Active	Source	Characteristic	Refinability	Group
A rare autosomal recessive cerebellar ataxia-epilepsy-intellectual disability syndrome characterized by early-childhood onset of cerebellar ataxia associated with generalized tonic-clonic epilepsy and psychomotor development delay, dysarthria, gaze-evoked nystagmus and learning disability. Other features in some patients include upper motor neuron signs with leg spasticity and extensor plantar responses, and mild cerebellar atrophy on brain MRI.	Is a	True	Intellectual disability	Inferred relationship	Some
Kagami-Ogata syndrome is a rare genetic disease characterized by polyhydramnios (mostly due to placentomegaly), fetal macrosomia, abdominal wall defects, skeletal abnormalities (including bell-shaped thorax, coat-hanger appearance of the ribs and decreased mid to wide thorax diameter ratio in infancy), feeding difficulties and impaired swallowing, dysmorphic features (hairy forehead, full cheeks, protruding philtrum, micrognathia), developmental delay and intellectual disability. Additional features may include kyphoscoliosis, joint contractures, diastasis recti, muscular hypotonia. There is increased risk of hepatoblastoma.	Is a	True	Intellectual disability	Inferred relationship	Some
Recessive intellectual disability-motor dysfunction-multiple joint contractures syndrome is a rare, genetic, syndromic intellectual disability disorder characterized by severe intellectual disability, progressive, postnatal, multiple joint contractures and severe motor dysfunction. Patients present arrest and regression of motor function and speech acquisition, as well as contractures which begin in lower limbs and slowly progress in an ascending manner to include spine and neck, resulting in individuals presenting a specific fixed position.	Is a	True	Intellectual disability	Inferred relationship	Some
A rare, genetic, neuro-endocrino-cutaneous disorder characterised by highly variable degrees of alopecia, moderate to severe intellectual disability, progressive, late-onset motor deterioration and combined anterior pituitary hormone deficiency, manifesting with central hypogonadotropic hypogonadism, delayed or absent puberty, growth hormone deficiency (resulting in short stature), progressive central adrenal insufficiency and a hypoplastic anterior pituitary gland. Additional features include hypodontia, flexural reticulate hyperpigmentation, gynaecomastia, microcephaly and kyphoscoliosis.	Is a	True	Intellectual disability	Inferred relationship	Some
A rare syndromic intellectual disability characterised by early developmental delay with failure to thrive, intellectual disability, congenital hepatic fibrosis, renal cystic dysplasia, and dysmorphic facial features (bilateral ptosis, anteverted nostrils, high arched palate, and micrognathia). Variable additional features have been reported, including cerebellar anomalies, postaxial polydactyly, syndactyly, genital anomalies, tachypnoea. There have been no further descriptions in the literature since 1987.	Is a	True	Intellectual disability	Inferred relationship	Some
A rare genetic malformation syndrome with characteristics of microcephaly, borderline intellectual disability, hyperpigmentation of the skin, short stature, and ventricular extrasystoles. Cardiac syncope may also be associated. There have been no further descriptions in the literature since 1975.	Is a	True	Intellectual disability	Inferred relationship	Some
A rare genetic malformation syndrome with short stature characterized by postnatal microcephaly, failure to thrive, global developmental delay and intellectual disability, hypotonia, dysmorphic features (short nose, depressed nasal bridge, low set ears, short neck, clinodactyly and cutaneous syndactyly of T2-3 at birth and broad forehead, midface retrusion, epicanthal folds, laterally sparse eyebrows, short nose, long philtrum, widely spaced teeth, micrognathia and coarsening of facial features later in life). Other associated features include postnatal transient generalized edema, myopia, strabismus, hypothyroidism.	Is a	True	Intellectual disability	Inferred relationship	Some
A rare genetic syndromic intellectual disability affecting males with characteristics of short stature, mild to moderate intellectual deficits, craniofacial dysmorphism (prominent broad 'square' forehead, hypertelorism, depressed nasal bridge, broad nasal tip and anteverted nares) and early hypotonia present only until the age of 2. There have been no further descriptions in the literature since the original article in 1991 and it has been suggested that this condition represents an example of FG syndrome.	Is a	True	Intellectual disability	Inferred relationship	Some
A rare syndromic microphthalmia disorder with characteristics of microphthalmia with coloboma (which may involve the iris, ciliary body, choroid, retina and/or optic nerve), microcephaly, short stature and intellectual disability. Other eye abnormalities such as pendular nystagmus, esotropia and ptosis may also be present. Additional associated abnormalities include kyphoscoliosis, anteverted pinnae with minimal convolutions, diastema of the incisors and congenital pes varus.	Is a	True	Intellectual disability	Inferred relationship	Some
A rare genetic syndrome with characteristics of severe developmental delay, neonatal hypotonia, seizures, optic nerve hypoplasia and distinct central nervous system malformations including extensive bilateral polymicrogyria, dysplastic or absent corpus callosum and malformed brainstem with loss of demarcation of the pontomedullary junction. There is evidence this disease is caused by homozygous mutation in the TUBA8 gene on chromosome 22q11.	Is a	True	Intellectual disability	Inferred relationship	Some
A rare genetic adrenal disorder with characteristics of congenital bronzed hyperpigmentation, cutis laxa of the hands and feet, body disproportion (comprising large hands, feet, nose and ears), hirsutism and severe intellectual disability. Patients additionally present hyperadrenocorticism, cushingoid features, premature adrenarche and diabetes mellitus, as well as skeletal deformities (not present at birth and which progress with age). There have been no further descriptions in the literature since 1981.	Is a	True	Intellectual disability	Inferred relationship	Some
A rare disorder of branched-chain amino acid metabolism with characteristics of childhood-onset epilepsy, autism and intellectual disability with reduced levels of plasma branched chain aminoacids. Caused by homozygous mutation in the BCKDK gene on chromosome 16p11.	Is a	True	Intellectual disability	Inferred relationship	Some
A rare genetic multiple congenital anomalies/dysmorphic syndrome with characteristics of congenital microcephaly with facial dysmorphism (sloping forehead, prominent nose, mild retrognathia), moderate to severe, non-progressive intellectual disability and symmetrical digital malformations of variable degree, including brachydactyly of the fifth fingers with single flexion crease, clinodactyly, syndactyly, polydactyly and hallux valgus. Congenital anonychia and white cafe au lait-like spots on the skin of hands and feet are also associated. There is evidence this disease is caused by homozygous mutation in the RBBP8 gene on chromosome 18q11.2.	Is a	True	Intellectual disability	Inferred relationship	Some
A rare genetic syndromic intellectual disability characterised by mild to severe global developmental delay, intellectual disability and behavioural abnormalities, hypotonia, strabismus, optic nerve hypoplasia and mild facial dysmorphic features (down slanting palpebral fissures, frontal bossing, crowded teeth, auricular abnormalities and prominent philtral ridges). Other associated clinical features may include seizures and skeletal anomalies (kyphosis/scoliosis, pectus deformities).	Is a	False	Intellectual disability	Inferred relationship	Some
A rare neurologic disease characterized by global developmental delay, intellectual disability, multiple ischemic lesions on brain MRI, behavioral abnormalities, dystonia, choreic movements and pyramidal syndrome, facial dysmorphism (hypertelorism, arched palate, macroglossia), retinitis pigmentosa, scoliosis, seizures.	Is a	True	Intellectual disability	Inferred relationship	Some
A rare genetic syndromic intellectual disability characterized by global developmental delay and borderline to severe intellectual disability, autism spectrum disorder with obsessive behavior, hyperactivity but frequently friendly and affable personality, feeding difficulties, short stature, muscular hypotonia, microcephaly, characteristic dysmorphic features (hypertelorism, high arched eyebrows, ptosis, deep and/or broad nasal bridge, broad/prominent nasal tip, short and/or upturned philtrum, narrow mouth, and micrognathia), and skeletal anomalies (kyphosis and/or scoliosis, arthrogryposis, slender habitus and extremities). Other clinical features may include hernias, congenital heart defects, cryptorchidism and seizures. Caused by heterozygous intragenic copy number variation in the KIAA0442 gene (AUTS2) on chromosome 7q11.	Is a	True	Intellectual disability	Inferred relationship	Some
A rare partial autosomal trisomy/tetrasomy characterised by facial dysmorphism (long thin face, prominent forehead, down-slanting palpebral fissures, prominent nose with broad nasal bridge, prominent chin), pre and postnatal overgrowth, renal anomalies (for example horseshoe kidney, renal agenesis, hydronephrosis), mild to severe learning difficulties and behavioural abnormalities. Additional features may include craniosynostosis and macrocephaly.	Is a	True	Intellectual disability	Inferred relationship	Some
RAB18 deficiency causes two disorders with similar signs and symptoms; Warburg micro syndrome and Martsolf syndrome. Both of these diseases are considered to be part of the same disease spectrum because of similar features and shared genetic cause. Manifestations include eye problems from birth including cataracts, microphthalmia and microcornea, intellectual disability, delayed development hypotonia, spasticity and joint contractures. Martsolf syndrome affects the same body systems as Warburg micro syndrome but is usually less severe. RAB18 deficiency is caused by mutations in the RAB3GAP1, RAB3GAP2, RAB18, or TBC1D20 gene.	Is a	True	Intellectual disability	Inferred relationship	Some
Syndrome with manifestations of borderline normal to severe intellectual disability. Most affected individuals have autism spectrum disorder (ASD), which can occur with characteristics that are unusual in people with ASD, such as an overly friendly demeanor. Other characteristics include delayed development, microcephaly, brachycephaly, hypertelorism, midface hypoplasia, small mouth with a thin upper lip. Diaphragmatic hernia is present in some cases. Caused by mutations in the POGZ gene. POGZ gene mutations are thought to impair the ability of the POGZ protein to bind to chromatin, leading to abnormal gene expression that affects development of the brain and other body systems. May be inherited in an autosomal dominant pattern, however most cases result from de novo mutations in the gene.	Is a	True	Intellectual disability	Inferred relationship	Some
Disease with characteristics of seizures that are resistant to treatment and begin in infancy. Development is impaired most children have severe intellectual disability and little or no speech. Common features include stereotypies, bruxism, disrupted sleep, feeding difficulties and gastrointestinal problems. Some individuals have distinctive facial features including a high and broad forehead, large and deep-set eyes, a well-defined philtrum, high palate. Microcephaly, scoliosis and tapered fingers have also been reported. Caused by mutations in the CDKL5 gene, which disrupts brain development. Inherited in an X-linked dominant pattern. The CDKL5 gene is located on the X chromosome however almost all cases of this condition result from de novo mutations in the CDKL5 gene.	Is a	True	Intellectual disability	Inferred relationship	Some
A rare hereditary syndromic intellectual disability with characteristics of craniofacial and skeletal abnormalities in association with mild intellectual disability in females and early postnatal lethality in males. In addition to mild cognitive impairment, females present with microcephaly, short stature, skeletal features and extra temporal lobe gyrus. In males, intrauterine growth impairment, cardiac and urogenital anomalies have been reported.	Is a	True	Intellectual disability	Inferred relationship	Some
A rare primary bone dysplasia with characteristics of severe developmental delay and skeletal dysplasia (including short stature, premature carpal ossification, platyspondyly, longitudinal metaphyseal striations, and small epiphyses), as well as moderate to severe intellectual disability and facial dysmorphism, including prominent forehead, mild synophrys, depressed nasal bridge, prominent bulbous nasal tip and full lips. Caused by homozygous or compound heterozygous mutation in the NANS gene on chromosome 9q22.	Is a	True	Intellectual disability	Inferred relationship	Some
A rare genetic multiple congenital anomalies/dysmorphic syndrome with characteristics of occipital atretic cephalocele associated with a specific facial dysmorphism (consisting of prominent forehead, narrow palpebral fissures, midface deficiency, narrow, malformed ears, broad nose and nasal root, grooved nasal tip and columella, laterally angulated, hypoplastic nares, short philtrum, thin upper lip, clift lip/palate, severe oligodontia, prominent chin) and large feet with sandal gap. Intellectual disability, developmental delay and hypoplastic finger and toenails have also been reported.	Is a	True	Intellectual disability	Inferred relationship	Some
A rare genetic X-linked syndromic intellectual disability disorder characterized by mild to severe intellectual disability, infancy-onset seizures, post-natal microcephaly, cerebral cortical malformations, dysmorphic facial features (including long, narrow face, almond-shaped palpebral fissures, epicanthic folds, high nasal bridge, malar flattening, posteriorly rotated ears, high arched palate, crowded teeth, micrognathia) and thin body habitus. Long and slim fingers/toes, strabismus, hypotonia, spasticity, optic disc atrophy, and behavioral problems (aggression, attention deficit hyperactivity disorder and irritability) are additional features. Caused by hemizygous mutation in the NSDHL gene on chromosome Xq28.	Is a	True	Intellectual disability	Inferred relationship	Some
A rare congenital disorder of glycosylation with characteristics of moderate intellectual disability, short stature, mild skeletal changes and distinctive facial features with coarse face, synophrys and deep nasolabial ridges. Skeletal features include broad ribs, stocky long bones, and short femoral necks with coxa valga, clinodactyly and broad thumbs.	Is a	True	Intellectual disability	Inferred relationship	Some
A rare syndromic intellectual disability disorder with characteristics of moderate intellectual disability, variable hand abnormalities (including brachydactyly, cutaneous and osseous syndactyly) and facial dysmorphism that includes short palpebral fissures, bulbous nasal tip, thin upper and lower vermilion and broad, pointed chin. Other features, including obesity, microcephaly, short stature and a grimacing smile may be observed.	Is a	True	Intellectual disability	Inferred relationship	Some
A rare genetic syndromic intellectual disability disorder with a variable phenotypic presentation. Typical characteristics are microcephaly, severe feeding difficulties, failure to thrive, severe global development delay that frequently results in absent/poor speech, moderate to profound intellectual disability, hypotonia and a distinctive facies that includes prominent forehead, high-arched, thin eyebrows, hypertelorism, downslanting palpebral fissures, long, tubular nose with broad tip and prominent nasal bridge and wide mouth with full, everted lower lip. Caused by heterozygous mutation in the ASXL3 gene on chromosome 18q12.	Is a	True	Intellectual disability	Inferred relationship	Some
A rare genetic immuno-osseous dysplasia disorder with characteristics of pre and post-natal growth retardation, hypotonia, borderline to moderate intellectual disability, retinal dystrophy, spondyloepiphyseal dysplasia (epiphyseal dysplasia, epiphyses ossification delay, vertebral changes) and skeletal anomalies (brachydactyly, fifth finger clinodactyly). Also associated are humeral immunodeficiency with inability to generate specific antibodies and low circulating B-cells, craniofacial dysmorphism that typically includes microcephaly, hypertelorism, long palpebral fissures, prominent eyelashes, a narrow, tubular, upturned nose with hypoplastic alae nasi, long philtrum and thin upper lip. There is evidence the disease is caused by compound heterozygous mutation in the RNU4ATAC gene on chromosome 2q14.	Is a	True	Intellectual disability	Inferred relationship	Some
A rare genetic syndromic intellectual disability disorder characterized by moderate to severe intellectual disability and esotropia. Other associated features may include growth failure (underweight, failure to thrive, short stature), microcephaly, tone abnormalities (hypotonia, spasticity), epilepsy, behavioral problems (hyperactivity, aggressiveness), and/or abnormal brain morphology, including arachnoid cyst, cerebral atrophy, mild ventriculomegaly, and abnormal central nervous system myelination or corpus callosum agenesis. There is evidence the disease is caused by homozygous mutation in the ADAT3 gene on chromosome 19p13.	Is a	True	Intellectual disability	Inferred relationship	Some
A rare genetic syndromic intellectual disability disorder characterized by severe intellectual disability with limited or absent speech and language, short stature, acquired microcephaly, kyphoscoliosis or scoliosis, and behavioral disturbances that include hyperactivity, stereotypy and aggressiveness. Facial dysmorphism typically includes sloping forehead, mild synophrys, deep-set eyes, strabismus, anteverted large ears, prominent nose and dental malposition. Caused by homozygous mutation in the TTI2 gene on chromosome 8p12.	Is a	True	Intellectual disability	Inferred relationship	Some
A rare genetic syndromic intellectual disability characterized by mild intellectual disability, short stature with high body mass index, short neck with cervical gibbus and dysmorphic facial features. A metabolic syndrome, including type 2 diabetes, hypercholesterolemia and hypertension has also been reported.	Is a	True	Intellectual disability	Inferred relationship	Some
A rare hereditary ataxia characterised by early onset symptomatic generalised epilepsy, progressive cerebellar ataxia resulting in significant difficulties to walk or wheelchair dependency, and intellectual disability. There is evidence the disease is caused by homozygous mutation in the TDP2 gene on chromosome 6p22.	Is a	True	Intellectual disability	Inferred relationship	Some
A rare genetic multiple congenital anomalies/dysmorphic syndrome with characteristics of mild to severe global development delay, severe intellectual disability, mild hypotonia, a short ulna, hirsutism of the face and extremities, minimal scoliosis, and facial dysmorphism, notably a tall broad forehead, synophrys, hypertelorism, malar hypoplasia, broad nose with thick alae nasi, low-set, small ears, long philtrum, thin upper lip and everted lower lip vermilion.	Is a	True	Intellectual disability	Inferred relationship	Some
13q12.3 microdeletion syndrome (disorder)	Is a	True	Intellectual disability	Inferred relationship	Some
A rare syndromic intellectual disability syndrome with characteristics of cortical blindness, different types of seizures, intellectual disability with limited or absent speech and dysmorphic facial features. Brain imaging typically shows mild pontine hypoplasia, hypoplasia of the corpus callosum and atrophy in the occipital region. There is evidence the disease is caused by compound heterozygous mutation in the DOCK7 gene on chromosome 1p31.	Is a	True	Intellectual disability	Inferred relationship	Some
A rare genetic syndromic intellectual disability disorder with characteristics of severe intellectual disability with significant speech and language impairment, hypohidrosis (often resulting in hyperthermia) with normal sweat gland appearance, tooth enamel hypoplasia, palmoplantar hyperkeratosis and a high frequency of acquired microcephaly. Mild facial dysmorphism, including lateral flaring of the eyebrows, broad nasal tip, and thick vermilion border, may also be observed. There is evidence the disease is caused by homozygous mutation in the COG6 gene on chromosome 13q14.	Is a	True	Intellectual disability	Inferred relationship	Some
A rare genetic syndromic intellectual disability with characteristics of mild intellectual disability, delayed speech development, congenital heart defects, brachydactyly and dysmorphic facial features.	Is a	True	Intellectual disability	Inferred relationship	Some
A rare genetic syndromic intellectual disability disorder with characteristics of global development delay, microcephaly, moderate to severe intellectual disability and facial dysmorphism which includes tall forehead, high anterior hairline, short upslanting palpebral fissures, deep-set eyes and a long nose with a low-hanging columella. Additionally congenital renal and cardiac malformations (such as horseshoe kidney, unilateral renal agenesis atrioventricular septal defects, patent ductus arteriosus) and corpus callosum dysplasia may be associated. The disease is caused by homozygous mutation in the THOC6 gene on chromosome 16p13.	Is a	True	Intellectual disability	Inferred relationship	Some
A rare genetic syndromic intellectual disability disorder characterised by borderline to severe intellectual disability, global development delay, feeding difficulties, microcephaly, short stature and mild facial dysmorphism, including thick eyebrows, long eyelashes, prominent incisors and/or thin upper lip. Other associated features may include hypermetropia with or without esotropia, behavioural anomalies (for example autistic behaviour, sleeping disturbances), urogenital abnormalities (for example cryptorchidism, inguinal hernia), single palmar crease, fifth-finger clinodactyly and cardiac defects. There is evidence the disease is caused by heterozygous mutation in the CTCF gene on chromosome 16q22.	Is a	True	Intellectual disability	Inferred relationship	Some
A rare genetic syndromic intellectual disability disorder with characteristics of global development delay with very limited or absent speech and language, severe intellectual disability, long slender fingers, ocular abnormalities (typically strabismus or hypermetropia) and facial dysmorphism that includes a grimacing facial expression, a tubular-shaped nose with a prominent, broad base and tip and other variable features, such as broad forehead, hypertelorism, deep-set eyes, narrow palpebral fissures, short philtrum and/or broad mouth. Caused by heterozygous mutation in the GATAD2B gene on chromosome 1q21.	Is a	True	Intellectual disability	Inferred relationship	Some
Spondylocostal dysostosis, hypospadias, intellectual disability syndrome	Is a	False	Intellectual disability	Inferred relationship	Some
A rare genetic syndromic intellectual disability syndrome with characteristics of mild to moderate intellectual disability, developmental delay (with speech and language development more severely affected) and facial dysmorphism which typically includes full, arched eyebrows, hypertelorism, down-slanting palpebral fissures, long eyelashes, ptosis, low-set, simple ears, bulbous nasal tip, flat philtrum, wide mouth with downturned corners and thin upper lip and diastema of the teeth. Association with infantile hypotonia, seizures, cryptorchidism in males and congenital abnormalities, including cardiac, cerebral or ocular defects, may be observed.	Is a	True	Intellectual disability	Inferred relationship	Some
A rare genetic multiple congenital anomalies/dysmorphic syndrome with characteristics of moderate to severe intellectual disability, congenital aphonia, hearing loss, optic atrophy, retinal dystrophy, broad thumbs and duplicated halluces. Facial dysmorphism (including thick eyebrows, ptosis, long, downslanting palpebral fissures, microstomia, low-set, posteriorly rotated ears) and genital abnormalities are also associated.	Is a	True	Intellectual disability	Inferred relationship	Some
A rare hereditary syndromic intellectual disability characterized by cognitive impairment, behavioral and psychiatric problems, recurrent infections, atopic diseases and distinctive facial features in males. Females are clinically asymptomatic or mildly affected presenting mild learning difficulties and facial dysmorphism.	Is a	False	Intellectual disability	Inferred relationship	Some
A rare hereditary neurologic disease with characteristics of early-onset cognitive impairment as a sole disability. The disease may be associated with autism, epilepsy and neuromuscular deficits.	Is a	True	Intellectual disability	Inferred relationship	Some
A rare X-linked syndromic intellectual disability disorder with characteristics of profound intellectual disability, global developmental delay with absent speech, seizures, large joint contractures, abnormal position of thumbs and middle-age onset of cardiomegaly and atrioventricular valve abnormalities, resulting in subsequent congestive heart failure. Additional features include variable facial dysmorphism (notably large ears with over folded helix) and large testes. There is evidence the disease is caused by mutation in the CLIC2 gene on chromosome Xq28.	Is a	True	Intellectual disability	Inferred relationship	Some
A rare multiple congenital anomalies/dysmorphic syndrome with characteristics of craniofacial dysmorphism (brachycephaly resulting from craniosynostosis, frontal bossing, downslanting palpebral fissures, large and low-set ears, depressed nasal bridge, high-arched, wide palate, thin upper lip), impaired neurological development with intellectual disability, hypotonia, pyloric stenosis, pectus excavatum, bilateral cryptorchidism and short stature.	Is a	True	Intellectual disability	Inferred relationship	Some
A rare junctional epidermolysis bullosa subtype characterized by late-onset blistering surrounded by erythema and localized on the anterior aspect of the lower legs, associated with dystrophic toenails, tooth enamel defects and mild to severe intellectual disability. Lens subluxation and mild facial dysmorphism (with short midface, prognathism and thin upper lip vermilion) are additional reported features. There have been no further descriptions in the literature since 1992.	Is a	True	Intellectual disability	Inferred relationship	Some
Pitt Hopkins-like syndrome	Is a	False	Intellectual disability	Inferred relationship	Some
A rare genetic multiple congenital anomalies/dysmorphic syndrome with characteristics of cerebellar-like ataxia, photosensitivity (mainly of the face and trunk), short stature and intellectual disability. Additional features include clinodactyly, single palmar transverse crease, high-arched palate, pseudohypertrophy of the calves and aortic valve lesions. There have been no further descriptions in the literature since 1983.	Is a	True	Intellectual disability	Inferred relationship	Some
A group of rare genetic developmental defect during embryogenesis disorders with the association of sensorineural deafness and onychodystrophy (for example absent/hypoplastic finger and toenails) as well as brachydactyly and finger-like thumbs.	Is a	True	Intellectual disability	Inferred relationship	Some
A rare syndromic intellectual disability characterised by hypotonia, developmental delay, absent or severely delayed speech development, obstructive sleep apnoea, mild dysmorphic facial features and behavioural abnormalities. Epilepsy, ataxia and nystagmus have also been reported. Caused by heterozygous mutation in the AHDC1 gene on chromosome 1p36.	Is a	True	Intellectual disability	Inferred relationship	Some
A rare genetic syndromic intellectual disability disorder with characteristics of mild to profound intellectual disability, delayed speech, obesity, ocular anomalies (blepharophimosis, blepharoptosis, hyperopic astigmatism, decreased visual acuity, strabismus, abducens nerve palsy, and/or accommodative esotropia), and dermal manifestations, such as chronic atopic dermatitis. Associated craniofacial dysmorphism includes macrocephaly, maxillary hypoplasia, mandibular prognathism and crowding of teeth.	Is a	True	Intellectual disability	Inferred relationship	Some
A rare genetic multiple congenital anomalies/dysmorphic syndrome with characteristics of delayed motor development, intellectual disability, dysarthria, pseudobulbar signs, cryptorchidism, and syndactyly associated with a FLBN1 gene point mutation. Macular degeneration and signs of brain atrophy and spinal cord compression have also been reported.	Is a	True	Intellectual disability	Inferred relationship	Some
A rare genetic pigmentation anomaly of the skin syndrome with characteristics of ventral as well as dorsal leukoderma of the trunk and a congenital white forelock in association with cerebellar ataxia, impaired motor coordination, intellectual disability of variable severity and progressive, mild to profound, unilateral or bilateral sensorineural hearing loss. There have been no further descriptions in the literature since 1971.	Is a	True	Intellectual disability	Inferred relationship	Some
A rare genetic syndromic intellectual disability disorder with highly variable phenotype. Typical characteristics are mild to severe global development delay, severe speech and language impairment, mild to severe intellectual disability, dysphagia, hypotonia, relative to true macrocephaly and behavioral problems that may include autistic features, hyperactivity and mood lability. Facial gestalt typically features a broad, prominent forehead, hypertelorism, downslanting palpebral fissures, ptosis, short bulbous nose with broad tip, thick vermilion border, wide and open mouth with downturned corners. Brain, cardiac, urogenital and ocular malformations may be associated. Caused by heterozygous mutation in the FOXP1 gene on chromosome 3p13.	Is a	True	Intellectual disability	Inferred relationship	Some
A rare genetic dysostosis syndrome with characteristics of bilateral symmetrical preaxial brachydactyly associated with hyperphalangy, motor developmental delay and intellectual disability, growth retardation, sensorineural hearing loss, dental abnormalities (including misalignment of teeth, talon cusps, microdontia), and facial dysmorphism that includes plagiocephaly, round face, hypertelorism, malar hypoplasia, malformed ears, microstomia and micro/retrognathia. There is evidence the disease is caused by homozygous mutation in the CHSY1 gene on chromosome 15q26.	Is a	True	Intellectual disability	Inferred relationship	Some
A rare genetic multiple congenital anomalies/dysmorphic syndrome with characteristics of congenital microcephaly, severe epilepsy with hypsarrhythmia, adducted thumbs, abnormal genitalia, and normal thyroid function. Hypotonia, moderate to severe psychomotor delay, and characteristic facial dysmorphism (including round face with prominent cheeks, blepharophimosis, large, bulbous nose with wide alae nasi, posteriorly rotated ears with dysplastic conchae, narrow mouth, cleft palate, and mild micrognathia) are additional characteristic features.	Is a	False	Intellectual disability	Inferred relationship	Some
Colobomatous microphthalmia, obesity, hypogenitalism, intellectual disability syndrome	Is a	True	Intellectual disability	Inferred relationship	Some
A form of hypotonia-cystinuria type 1 syndrome with characteristics of mild to moderate intellectual disability in addition to classic hypotonia-cystinuria syndrome phenotype (cystinuria type 1, generalised hypotonia, poor feeding, growth retardation and minor facial dysmorphism).	Is a	True	Intellectual disability	Inferred relationship	Some
A neurological disorder with characteristics of moderate to severe intellectual disability that is evident in early childhood. Early manifestations include delayed development of speech and motor skills, hypotonia, developmental regression, recurrent epilepsy, hyperactivity and autism spectrum disorder. Caused by mutations in the SYNGAP1 gene preventing the production of functional SynGAP protein from one copy of the gene which results in reduced protein activity in cells. May be inherited in an autosomal dominant manner or as a new mutation in the gene.	Is a	True	Intellectual disability	Inferred relationship	Some
A rare genetic disorder of thiamine metabolism and transport characterized by infantile spasms progressing to symptomatic generalized or partial seizures, severe global developmental delay, progressive brain atrophy and bilateral thalamic and basal ganglia lesions.	Is a	True	Intellectual disability	Inferred relationship	Some
A rare hemolytic anemia characterized by a combination of neurologic features, such as psychomotor delay, seizures, variable movement disorders and hemolytic anemia with stomatocytosis, resulting in cation-leaky erythrocytes, pseudohyperkalemia, hemolytic crises and hepatosplenomegaly. Cataracts are also a presenting feature. There is evidence the disease is caused by heterozygous mutation in the SLC2A1 gene on chromosome 1p34.	Is a	True	Intellectual disability	Inferred relationship	Some
A rare fatal inborn error of metabolism disorder with characteristics of respiratory distress and severe hypotonia at birth, severe global developmental delay, early-onset intractable seizures, myopathic facies with craniofacial dysmorphism (trigonocephaly/progressive microcephaly, low anterior hairline, arched eyebrows, hypotelorism, strabismus, small nose, prominent philtrum, thin upper lip, high-arched palate, micrognathia, malocclusion), severe, congenital flexion joint contractures and elevated serum creatine kinase levels. Scoliosis, optic atrophy, mild hepatomegaly, and hypoplastic genitalia may also be associated. There is evidence the disease is caused by homozygous or compound heterozygous mutation in the DPM2 gene on chromosome 9q34.	Is a	True	Intellectual disability	Inferred relationship	Some
A rare syndromic intellectual disability characterized by intellectual disability of various severity, hypotonia, feeding difficulties, dysmorphic features, autism and behavioral issues. Growth retardation, congenital heart anomalies, gastrointestinal and genitourinary defects have been rarely associated. Caused by heterozygous mutation in the SETD5 gene on chromosome 3p25.	Is a	True	Intellectual disability	Inferred relationship	Some
A rare genetic neurometabolic disorder with characteristics of severe progressive microcephaly, severe to profound global development delay, intellectual disability, seizures (typically tonic and/or myoclonic and frequently intractable), hyperekplexia and axial hypotonia with appendicular spasticity, as well as hyperreflexia, dyskinetic quadriplegia and abnormal brain morphology (cerebral atrophy with variable additional features including ventriculomegaly, pons and/or cerebellar hypoplasia, simplified gyral pattern and delayed myelination). Cortical blindness, feeding difficulties and respiratory insufficiency may also be associated. There is evidence the disease is caused by homozygous or compound heterozygous mutation in the ASNS gene on chromosome 7q21.	Is a	True	Intellectual disability	Inferred relationship	Some
A rare genetic central nervous system malformation syndrome with characteristics of early-onset progressive severe cerebellar ataxia associated with progressive moderate to severe intellectual disability, global developmental delay, progressively coarsening facial features, relative macrocephaly and absence of seizures. Sensorineural hearing loss may be associated. Neuroimaging reveals cerebellar atrophy/hypoplasia. There is evidence the disease is caused by homozygous mutation in the SNX14 gene on chromosome 6q14.	Is a	True	Intellectual disability	Inferred relationship	Some
A rare genetic syndromic intellectual disability disorder with characteristics of congenital external nuclear ophthalmoplegia, lingua scrotalis, progressive chorioretinal sclerosis and intellectual disability. Bilateral ptosis, bilateral facial weakness, Parinaud syndrome, convergence paresis and myopia may be associated. There have been no further descriptions in the literature since 1975.	Is a	True	Intellectual disability	Inferred relationship	Some
A rare genetic myotonic syndrome characterized by childhood onset of progressive and severe myotonia (with generalized muscular hypertrophy and progressive impairment of gait) short stature, skeletal abnormalities (including pectus carinatum, short, wedge-shaped thoracolumbar vertebrae, kyphoscoliosis, genu valgum, irregular femoral epiphyses) and mild to moderate intellectual deficiency. Facial dysmorphism and joint limitation are not associated. There have been no further descriptions in the literature since 1984.	Is a	True	Intellectual disability	Inferred relationship	Some
A rare genetic syndromic intellectual disability characterised by developmental delay, hypotonia, speech delay, mild to moderate intellectual disability, abnormal behaviour (autistic, aggressive, hyperactive) and dysmorphic facial features, including synophrys or thick eyebrows, deep set eyes, bulbous nasal tip and full cheeks. Congenital heart and brain anomalies, visual and hearing impairment are also common.	Is a	False	Intellectual disability	Inferred relationship	Some
An extremely rare multiple congenital anomalies/dysmorphic syndrome with characteristics of craniofacial dysmorphism including microbrachycephaly, sloping forehead, micro/anophthalmia, large ears, prominent nasal root, mild micrognathia and cleft palate. The syndrome is associated with cerebral palsy with choreoathetoid movements, intellectual disability, dextrocardia and longitudinal folding of plantae pedis. There have been no further descriptions in the literature since 1992.	Is a	True	Intellectual disability	Inferred relationship	Some
A rare genetic neurological disease with the association of macrocephaly, dysmorphic facial features and psychomotor delay leading to intellectual disability and autism spectrum disorder. Facial dysmorphism may include frontal bossing, hypertelorism, midface hypoplasia, depressed nasal bridge, short nose and long philtrum.	Is a	True	Intellectual disability	Inferred relationship	Some
A rare genetic congenital muscular dystrophy due to dystroglycanopathy disorder. The disease has characteristics of a wide phenotypic spectrum including hypotonia and muscular weakness, which is present at birth or early infancy and delayed or arrested motor development associated with mild to severe intellectual disability and variable brain abnormalities on neuroimaging studies. Feeding difficulties, joint and spinal deformities, respiratory insufficiency and ocular anomalies (for example strabismus, retinal dystrophy, oculomotor apraxia) may be associated. Decreased or absent alpha-dystroglycan on immunohistochemical muscle staining and elevated serum creatine kinase are observed.	Is a	True	Intellectual disability	Inferred relationship	Some
A rare genetic X-linked syndromic intellectual disability disorder with characteristics of moderate to severe intellectual disability associated with epilepsy, short stature, autistic features and behavioural problems, such as self- injury and aggressive outbursts. Observed facial dysmorphism includes brachycephaly, prominent supraorbital ridges, and deep-set eyes. Additional variable manifestations include malposition of feet, asthenic habitus, hyporeflexia, bowel occlusions, hydronephrosis, horseshoe kidney, delayed motor development and disturbed sleep-wake cycle. Caused by mutation in the GRIA3 gene.	Is a	True	Intellectual disability	Inferred relationship	Some
A rare syndromic intellectual disability with characteristics of global developmental delay including severely delayed or absent speech, moderate to severe intellectual disability, behavioural issues, stereotypic behaviour, febrile seizures and epilepsy, abnormal gait, vision defects and characteristic facial features. Intrauterine growth restriction and feeding difficulties are frequently present.	Is a	False	Intellectual disability	Inferred relationship	Some
A rare genetic multiple congenital anomalies/dysmorphic syndrome with characteristics of severe white matter hypoplasia, corpus callosum agenesis or extreme hypoplasia, severe intellectual disability, failure to thrive and minor midline facial dysmorphism (including hypertelorism, broad nasal root, micrognathia). There have been no further descriptions in the literature since 1993.	Is a	True	Intellectual disability	Inferred relationship	Some
A rare genetic congenital muscular alpha-dystroglycanopathy with brain and eye anomalies. The disorder has characteristics of a severe muscle-eye-brain disease-like phenotype associated with intellectual disability, muscular dystrophy, macrocephaly and extended bilateral multicystic white matter disease. There is evidence the disease is caused by homozygous mutation in the DAG1 gene on chromosome 3p21.	Is a	True	Intellectual disability	Inferred relationship	Some
A rare X-linked syndromic intellectual disability disease with characteristics of neonatal hypertonia which evolves to hypotonia and an exaggerated startle response (to sudden visual, auditory or tactile stimuli), followed by the development of early-onset, frequently refractory, tonic or myoclonic seizures. Progressive epileptic encephalopathy, intellectual disability, and psychomotor development arrest, with subsequent decline, may be additionally associated. There is the disease is caused by mutation in the ARHGEF9 gene on chromosome Xq22.1.	Is a	True	Intellectual disability	Inferred relationship	Some
A rare genetic multiple congenital anomalies/dysmorphic syndrome with characteristics of varying degrees of intellectual disability, global developmental delay (notably with severe speech and language impairment), muscular hypotonia, and facial dysmorphism (such as broad forehead, bitemporal narrowing, upslanting palpebral fissures, low-set ears, flat nasal bridge, bulbous nose and variably macroglossia). Highly variable additional features include cardiac defects (including persistent foramen ovale, ventricular septal defects, tetralogy of Fallot), coordination problems, seizures, abnormal growth parameters (including microcephaly, low birth and postnatal weight) and brain morphology anomalies (such as ventriculomegaly and myelination defects).	Is a	True	Intellectual disability	Inferred relationship	Some
A rare genetic chromosomal anomaly syndrome resulting from a partial deletion of the long arm of chromosome 21. The disease has characteristics of pre and post-natal growth delay, short stature, intellectual disability, developmental delay with severe language impairment, thrombocytopenia and craniofacial dysmorphism which may include microcephaly, downslanted palpebral fissures, low-set ears, broad nose, thin upper vermillion and downturned corners of the mouth. Brain MRI abnormalities (such as agenesis of the corpus callosum) behavioural problems and seizures may be associated.	Is a	True	Intellectual disability	Inferred relationship	Some
A rare genetic syndromic intellectual disability disorder with characteristics of variable degrees of intellectual disability, behavioral problems (including attention deficit and hyperactivity disorder, autism spectrum disorder, and aggressiveness) an altered sleeping pattern and delayed speech and language development associated with disruption of ankyrin 3 (ANK3 gene). Additional features observed may include muscular hypotonia and spasticity. Epilepsy, chronic hunger and dysmorphic facial features have been reported.	Is a	True	Intellectual disability	Inferred relationship	Some
A rare genetic syndromic intellectual disability disease with characteristics of global developmental delay, microcephaly, mild to moderate intellectual disability, truncal ataxia, trunk and limb, or generalized, choreiform movements, and elevated serum creatine kinase levels. Variably associated features include mild cerebral atrophy, muscular weakness or hypotonia in early childhood, and/or seizures. Ocular abnormalities (for example exophoria, anisometropia, amblyopia) have been reported.	Is a	True	Intellectual disability	Inferred relationship	Some
Prune belly syndrome with pulmonic stenosis, intellectual disability and deafness (disorder)	Is a	True	Intellectual disability	Inferred relationship	Some
Syndrome with characteristics of intellectual deficit, early-onset hypotonia, ataxia, delayed motor development, hearing impairment and loss of vision due to optic atrophy. Other manifestations included floppiness, susceptibility to infections and later flaccid tetraplegia and areflexia. It is caused by missense mutations in the phosphoribosyl pyrophosphate synthetase 1 gene (PRPS1) localized to Xq22.1-q24, leading to impaired purine biosynthesis. Transmitted as an X-linked recessive trait. The disease has a fatal course during childhood (the majority of patients die before the age of 5 years) due to the high susceptibility of the patients to infections, especially of the upper respiratory tract.	Is a	True	Intellectual disability	Inferred relationship	Some
Cross syndrome	Is a	True	Intellectual disability	Inferred relationship	Some
Hennekam lymphangiectasia-lymphedema syndrome (disorder)	Is a	True	Intellectual disability	Inferred relationship	Some
A rare congenital neurological disorder with characteristics of the association of partial bilateral aniridia with non-progressive cerebellar ataxia and intellectual disability. Aniridia is visible at birth as fixed dilated pupils. Non-progressive cerebellar ataxia is associated with delayed developmental milestones and hypotonia, gait and balance disorders with incoordination, intention tremor and scanning speech. Sporadic and familial cases have been observed.	Is a	True	Intellectual disability	Inferred relationship	Some
Seckel syndrome	Is a	True	Intellectual disability	Inferred relationship	Some
Fragile X syndrome	Is a	True	Intellectual disability	Inferred relationship	Some
Angelman syndrome	Is a	True	Intellectual disability	Inferred relationship	Some
Lowe syndrome	Is a	True	Intellectual disability	Inferred relationship	Some
A rare genetic epilepsy syndrome with characteristics of congenital alopecia, early-onset epilepsy, intellectual disability and speech delay. Large stature, delayed bone development and abnormal electroencephalogram have also been associated.	Is a	True	Intellectual disability	Inferred relationship	Some
Blepharophimosis, intellectual disability syndrome (disorder)	Is a	True	Intellectual disability	Inferred relationship	Some
Woodhouse-Sakati syndrome is a multisystemic disorder with characteristics of hypogonadism, alopecia, diabetes mellitus, intellectual deficit and extrapyramidal signs with choreoathetoid movements and dystonia. The onset is usually in adolescence. Additional manifestations may include sensorineural deafness, flattened T waves on ECG, seizures, sensory polyneuropathy, dysarthria, various craniofacial abnormalities (high forehead, flat occiput, triangular face, prominent nasal root, hypertelorism, and down-slanting palpebral fissures), scoliosis, hyperreflexia, and camptodactyly. Associated with mutations in the DCAF17 gene (2q31.1), encoding a nucleolar protein of unknown function. The disease is transmitted in an autosomal recessive manner.	Is a	True	Intellectual disability	Inferred relationship	Some
Myhre syndrome	Is a	True	Intellectual disability	Inferred relationship	Some
14q32 deletion syndrome	Is a	True	Intellectual disability	Inferred relationship	Some
X-linked intellectual disability hypotonic face syndrome	Is a	True	Intellectual disability	Inferred relationship	Some
Tetrasomy 12p syndrome (disorder)	Is a	True	Intellectual disability	Inferred relationship	Some
A rare, fatal multiple congenital anomalies/dysmorphic syndrome characterized by facial dysmorphism (including dolichocephaly/scaphocephaly, high frontal hairline, laterally overlapping upper eyelids, hypertelorism, prominent eyelashes, deep-set eyes, macrocornea, nystagmus, dysplastic ears, abnormal auricles, prominent nasal bridge, dental dysplasia), visual impairment, deafness, seizures, generalized skeletal dysplasia, high fingerprint ridge count, cryptorchidism, hypospadias, spasticity and severe intellectual disability. An increased chromosome breakage and a fatal lymphoid malignancy have been reported. There has been no further description in the literature since 1974.	Is a	True	Intellectual disability	Inferred relationship	Some
A rare genetic neurological disorder characterized by a pregnancy complicated by polyhydramnios, severe intractable epilepsy presenting in infancy, severe hypotonia, decreased muscle mass, global developmental delay, craniofacial dysmorphism (long face, large forehead, peaked eyebrows, broad nasal bridge, hypertelorism, large mouth with thick lips), and macrocephaly due to megalencephaly and hydrocephalus in most patients. Additional features that have been reported include cardiac anomalies like atrial septal defects, diabetes insipidus, and nephrocalcinosis, among others.	Is a	True	Intellectual disability	Inferred relationship	Some
A rare genetic multiple congenital anomalies/dysmorphic syndrome characterized by global developmental delay and moderate to severe intellectual disability, as well as variable other manifestations, such as macro- or microcephaly, epilepsy, hypotonia, behavioral problems, stereotypic movements, and facial dysmorphism (including arched eyebrows, long palpebral fissures, prominent nasal bridge, upturned nose, dysplastic ears, and broad mouth), among others. Brain imaging may show cerebellar anomalies, hypoplastic corpus callosum, enlarged ventricles, polymicrogyria, or white matter abnormalities.	Is a	True	Intellectual disability	Inferred relationship	Some

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Id	Description	Lang	Type	Status	Case?	Module
175156010	Intellectual disability	en	Synonym (core metadata concept)	Active	Entire term case insensitive (core metadata concept)	SNOMED CT core
2715379015	Intellectual disability (disorder)	en	Fully specified name	Active	Entire term case insensitive (core metadata concept)	SNOMED CT core
3642975016	Intellectual developmental disorder	en	Synonym (core metadata concept)	Active	Entire term case insensitive (core metadata concept)	SNOMED CT core
4940531000005115	nedsat intellektuel funktion	da	Synonym (core metadata concept)	Active	Entire term case insensitive (core metadata concept)	Danish module (core metadata concept)