900000000000509007: United States of America English language reference set (foundation metadata concept)

SNOMED CT Concept\SNOMED CT Model Component\Foundation metadata concept (foundation metadata concept)\Reference set\Language type reference set (foundation metadata concept)\English [International Organization for Standardization 639-1 code en] language reference set (foundation metadata concept)\US English

Status: current, Not sufficiently defined by necessary conditions definition status (core metadata concept). Date: 31-Jan 2002. Module: SNOMED CT model component module (core metadata concept)

Descriptions:

Expanded Value Set

Outbound Relationships	Type	Target	Active	Characteristic	Refinability	Group	Values
US English	Is a	English [International Organization for Standardization 639-1 code en] language reference set (foundation metadata concept)	true	Inferred relationship	Some

Members	acceptabilityId
A rare autosomal dominant cerebellar ataxia with characteristics of slowly progressive late-onset gait and limb ataxia, dysarthria and variable nystagmus. Brain imaging reveals cerebellar atrophy.	Preferred (foundation metadata concept)
A rare autosomal dominant condition characterized by variable expression of microcephaly, ocular disorders including chorioretinopathy, congenital lymphedema of the lower limbs and mild to moderate intellectual disability. The exact prevalence is not known but the disorder is thought to be rare. The microcephaly is primary, and the severity is variable even within families. Mild to moderate learning difficulties are common. A characteristic facial phenotype including up slanting palpebral fissures, broad nose with rounded tip, anteverted nares, long philtrum with thin upper lip, and prominent chin and ears is well recognized. There is likely to be genetic heterogeneity. However, a significant proportion of cases are caused by mutations in the kinesin family member 11 (KIF11) gene (10q24.1). Inheritance is autosomal dominant with variable expression and reduced penetrance.	Preferred (foundation metadata concept)
A rare autosomal dominant congenital non-dystrophic myopathy characterized by neonatal or infantile-onset hypotonia and mild to severe generalized muscle weakness. Causative gene mutation is ACTA1 (1q42.13).	Preferred (foundation metadata concept)
A rare autosomal dominant congenital non-dystrophic myopathy characterized by neonatal or infantile-onset hypotonia and mild to severe generalized muscle weakness. Causative gene mutation is TPM3 (1q21.3).	Preferred (foundation metadata concept)
A rare autosomal dominant congenital non-dystrophic myopathy characterized by neonatal or infantile-onset hypotonia and mild to severe generalized muscle weakness. Caused by SELENON (1p36.11) gene mutation.	Preferred (foundation metadata concept)
A rare autosomal dominant disorder characterized by a generalized enlargement of the gingiva occurring at birth or during childhood that is associated with generalized hypertrichosis developing at birth, during the first years of life, or at puberty and predominantly affecting the face, upper limbs, and midback.	Preferred (foundation metadata concept)
A rare autosomal dominant disorder with features of aplasia, atresia or hypoplasia of the lacrimal and salivary glands leading to varying manifestations from infancy such as recurrent eye infections, irritable eyes, epiphora, xerostomia, dental caries, dental erosion and oral inflammation.	Preferred (foundation metadata concept)
A rare autosomal dominant distal hereditary motor neuropathy disease with characteristics of muscle weakness and wasting predominantly affecting the hands, in particular the thenar and first dorsal interosseus muscles, and/or marked foot deformity and gait disturbance. Sensation is normal, although reduced response to vibration has been described. The disease is slowly progressive with an age of onset within the first few decades of life.	Preferred (foundation metadata concept)
A rare autosomal dominant distal hereditary motor neuropathy with characteristics of onset of slowly progressive distal limb weakness and atrophy between the second and fifth decades of life. Sensory involvement is typically less pronounced or absent. The severity of the condition is variable and both lower and upper extremities may be involved.	Preferred (foundation metadata concept)
A rare autosomal dominant form of heart-hand syndrome, first described in members of a Slovenian family. The syndrome has characteristics of adult onset, progressive cardiac conduction disease, tachyarrhythmias that can lead to sudden death, dilated cardiomyopathy and brachydactyly, with the hands less severely affected than the feet. Muscle weakness and/or myopathic electromyographic findings have been observed in some cases.	Preferred (foundation metadata concept)
A rare autosomal dominant hereditary axonal motor and sensory neuropathy characterized by early onset of generalized hypotonia and weakness, or later onset of distal lower limb muscle weakness and atrophy, cramps and sensory impairment. Weakness and atrophy progress in an asymmetric fashion to also involve the proximal and upper limbs in the course of the disease. Additional features are pyramidal signs like increased muscle tone and extensor plantar reflexes as well as learning difficulties.	Preferred (foundation metadata concept)
A rare autosomal dominant hereditary axonal motor and sensory neuropathy with characteristics of adult onset of slowly progressive distal muscle weakness and atrophy, sensory impairment, and hyporeflexia beginning in the lower limbs. Progressive gait disturbance may lead to loss of independent ambulation in some patients at a higher age.	Preferred (foundation metadata concept)
A rare autosomal dominant hereditary axonal motor and sensory neuropathy with characteristics of childhood onset of slowly progressive distal muscle weakness and atrophy primarily affecting the lower limbs, associated with sensory impairment and ataxia presenting with an unsteady, broad-based gait and frequent falls. Additional signs include decreased deep tendon reflexes and hand tremor.	Preferred (foundation metadata concept)
A rare autosomal dominant hereditary demyelinating motor and sensory neuropathy with characteristics of progressive distal muscle weakness and atrophy, distal sensory impairment and decreased or absent reflexes in the affected limbs with an onset in the first or second decade of life. Median motor nerve conduction velocities are typically less than 38 m/s. Patients often have foot deformities. Sural nerve biopsy shows decrease in myelinated fibers, myelin abnormalities, and onion bulb formation. Fatty replacement of muscle tissue predominantly affects the anterior and lateral compartment of the lower legs.	Preferred (foundation metadata concept)
A rare autosomal dominant inherited chorioretinal degenerative disease presenting at birth or during infancy. The disease has characteristics of progressive bilateral retinal and choroidal atrophy which appears as lesions on the optic nerve and peripheral ocular fundus and leads to loss of central vision. Congenital anterior polar cataracts are sometimes associated with this disease. There is evidence this disease is caused by heterozygous mutation in the TEA domain family member-1 gene (TEAD1) on chromosome 11p15.	Preferred (foundation metadata concept)
A rare autosomal dominant limb girdle muscular dystrophy with characteristics of adult onset of proximal muscle weakness, pain and wasting predominantly affecting the proximal leg, lumbar paraspinal and medial gastrocnemius muscles. Upper limb involvement may also be observed in some cases. Serum creatine kinase is often but not always elevated and muscle biopsy shows non-specific myopathic changes. The severity of the disease is variable although most patients remain ambulatory.	Preferred (foundation metadata concept)
A rare autosomal dominant neurological disorder with characteristics of early onset cerebellar ataxia, associated with areflexia, progressive optic atrophy, sensorineural deafness, a pes cavus deformity and abnormal eye movements.	Preferred (foundation metadata concept)
A rare autosomal dominantly inherited disease of childhood characterized by hypoproliferative anemia, hyperuricemia and slowly progressing kidney failure due to dysregulation of the renin-angiotensin system.	Preferred (foundation metadata concept)
A rare autosomal ichthyosis syndrome with prominent neurologic signs and the association of congenital ichthyosis with global developmental delay, intellectual disability, infantile-onset seizures and spastic tetraplegia. Brain imaging may show delayed myelination and cerebral atrophy. Marked intrafamilial variability has been reported.	Preferred (foundation metadata concept)
A rare autosomal ichthyosis syndrome with prominent neurologic signs and the association of congenital ichthyosis with severe developmental delay, microcephaly, spastic tetraplegia, sensorineural hearing impairment, athetosis, and myoclonus. Marked epileptic discharges with occurrence of tonic spasms have also been reported. Cerebral MRI shows diffuse cortical atrophy.	Preferred (foundation metadata concept)
A rare autosomal recessive axonal hereditary motor and sensory neuropathy with characteristics of adolescent or adult onset of slowly progressive muscle weakness and atrophy of the distal lower limbs progressing to involve also the upper limbs and proximal muscles and sensory impairment. Patients present gait disturbances and loss of reflexes, at later stages loss of ambulation, dysarthria, dysphagia, facial weakness and impairment of respiratory muscles requiring assisted ventilation.	Preferred (foundation metadata concept)
A rare autosomal recessive axonal hereditary motor and sensory neuropathy with characteristics of adult onset of slowly progressive distal muscle weakness and atrophy, sensory impairment and decreased or absent deep tendon reflexes predominantly in the lower extremities. Patients present gait disturbances but remain ambulatory. Mild involvement of the upper limbs may be seen.	Preferred (foundation metadata concept)
A rare autosomal recessive axonal hereditary motor and sensory neuropathy with characteristics of childhood to adult onset of slowly progressive, sometimes asymmetric distal muscle weakness and atrophy, as well as sensory impairment, predominantly of the lower limbs. Additional common features include pes cavus, kyphoscoliosis, ankle contractures, tremor or urogenital dysfunction. Fasciculations and proximal involvement may be seen in some cases. Patients usually remain ambulatory.	Preferred (foundation metadata concept)
A rare autosomal recessive axonal hereditary motor and sensory neuropathy with characteristics of infantile onset of recurrent episodes of acute liver failure (resulting in chronic liver fibrosis and hepatosplenomegaly), delayed motor development, cerebellar dysfunction presenting as gait disturbances and intention tremor, neurogenic stuttering and motor and sensory neuropathy with muscle weakness especially in the lower legs, and numbness. Mild intellectual disability was reported in some patients. MRI of the brain shows non-progressive atrophy of the cerebellar vermis and thinning of the optic nerve.	Preferred (foundation metadata concept)
A rare autosomal recessive axonal hereditary motor and sensory neuropathy with characteristics of motor-predominant axonal polyneuropathy due to a defect in copper metabolism. Patients become symptomatic in infancy or childhood with subtle motor delay or regression, manifesting with progressive weakness, muscle wasting and absent reflexes in the lower and upper extremities. In addition, vibratory sensation is mildly diminished. Involvement of the face with weakness and fasciculation of facial muscles has also been described.	Preferred (foundation metadata concept)
A rare autosomal recessive cerebellar ataxia characterized by progressive cerebellar ataxia associated with oculomotor apraxia, severe neuropathy, and hypoalbuminemia. Cerebellar ataxia is the first manifestation of AOA1 with progressive gait imbalance followed by dysarthria, and limb dysmetria. Later, peripheral axonal motor neuropathy dominates the clinical picture. Oculomotor apraxia is present in almost all individuals with AOA1. Chorea is present at onset in 80% of patients and upper limb dystonia occurs in about 50% of individuals. Additional features include square wave jerks, saccadic pursuit and gaze-evoked nystagmus, areflexia followed by severe peripheral neuropathy. Variable intellectual disability is observed.	Preferred (foundation metadata concept)
A rare autosomal recessive cerebellar ataxia with characteristics of early onset of slowly progressive cerebellar atrophy, clinically manifesting with extremity and truncal ataxia, global developmental delay, intellectual impairment, nystagmus, dysarthria, intention tremor and pyramidal signs among others.	Preferred (foundation metadata concept)
A rare autosomal recessive cerebellar ataxia with characteristics of onset of dystonia and other extrapyramidal signs, ataxia, oculomotor apraxia and progressive sensorimotor polyneuropathy in the first decade of life. Patients present distal muscle weakness and atrophy, decreased vibratory sensation and areflexia, and usually become wheelchair-bound by the third decade. Variable cognitive impairment may also be seen.	Preferred (foundation metadata concept)
A rare autosomal recessive cerebellar ataxia with characteristics of progressive cerebellar ataxia associated with frequent oculomotor apraxia, severe neuropathy and an elevated serum alpha-fetoprotein (AFP) level. This disease is mostly an adolescent onset disorder. Caused by mutations in SETX gene (9q34), encoding senataxin protein, a DNA/RNA helicase in nucleus which is implicated in DNA break repair. Mutations in the gene PIK3R5 (17p13.1) have also been implicated in the pathogenesis of this disease. Transmission is autosomal recessive.	Preferred (foundation metadata concept)
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. Caused by homozygous mutation in the WWOX gene on chromosome 16q23.	Preferred (foundation metadata concept)
A rare autosomal recessive complex spastic paraplegia with characteristics of mostly adult-onset progressive spasticity and weakness predominantly affecting the lower limbs, axonal motor and sensory neuropathy and cerebellar symptoms like ataxia, dysarthria and oculomotor abnormalities. Variable degrees of cognitive impairment may also be present. Subtle extrapyramidal involvement and supranuclear gaze palsy were reported in some cases. Features on brain imaging include cerebral and cerebellar atrophy and sometimes abnormalities of the corpus callosum or basal ganglia.	Preferred (foundation metadata concept)
A rare autosomal recessive congenital non-dystrophic myopathy characterized by neonatal or infantile-onset hypotonia and mild to severe generalized muscle weakness. Causative gene mutation is ACTA1 (1q42.13).	Preferred (foundation metadata concept)
A rare autosomal recessive congenital non-dystrophic myopathy characterized by neonatal or infantile-onset hypotonia and mild to severe generalized muscle weakness. Causative gene mutation is TPM3 (1q21.3).	Preferred (foundation metadata concept)
A rare autosomal recessive congenital non-dystrophic myopathy characterized by neonatal or infantile-onset hypotonia and mild to severe generalized muscle weakness. Caused by SELENON (1p36.11) gene mutation.	Preferred (foundation metadata concept)
A rare autosomal recessive disorder characterized by very early-onset and severe hypertension, low renin levels, low aldosterone, metabolic alkalosis, hypernatremia, and hypokalemia.	Preferred (foundation metadata concept)
A rare autosomal recessive distal hereditary motor neuropathy with characteristics of slowly progressive muscular weakness, hypotonia and atrophy of the lower limbs, more pronounced distally, leading to paralysis, and loss of tendon reflexes. Additional features may include pes cavus and mild dysphonia. The upper limbs are relatively spared. There is evidence this disease is caused by homozygous mutation in the DNAJB2 gene on chromosome 2q35.	Preferred (foundation metadata concept)
A rare autosomal recessive distal myopathy with characteristics of early adult-onset slowly progressive often asymmetrical lower limb muscle weakness initially affecting the calves (with relative anterior muscle sparing) and later proximal muscle involvement, as well as highly elevated creatine kinase (CK) serum levels. Age at onset ranges from 20 to 50 years. Clinical manifestations can be mild or subjectively nonexistent in spite of presenting clear changes on muscle imaging. Caused by loss of function mutations in the gene ANO5 (11p14.3) which encodes a protein highly expressed in skeletal and cardiac muscle, as well as bone.	Preferred (foundation metadata concept)
A rare autosomal recessive distal myopathy with characteristics of slowly progressive diffuse muscle weakness in childhood, followed by predominantly distal muscle weakness in adolescence and quadriceps muscle weakness in the fourth decade. Facial muscle weakness is commonly reported. Muscle biopsy shows fiber size variation, increased internal nuclei, fiber splitting, rimmed vacuoles and focal endomysial fibrosis.	Preferred (foundation metadata concept)
A rare autosomal recessive hereditary sensory and autonomic neuropathy characterized by congenital impaired sensation of acute or inflammatory pain in combination with an inability to identify noxious heat or cold, leading to numerous painless mutilating lesions and injuries. Further manifestations are absence of corneal reflexes resulting in corneal scarring, reduced sweating and tearing and recurrent skin infections. Large-fiber sensory modalities such as light touch, vibration and proprioception are normal.	Preferred (foundation metadata concept)
A rare autosomal recessive hereditary sensory and autonomic neuropathy characterized by the complete absence of pain perception from birth, an unresponsiveness to soft touch, severe non-progressive cognitive delay and normal motor movement/behavior and strength. Affected cases retain hot and cold perception.	Preferred (foundation metadata concept)
A rare autosomal recessive inherited disorder caused by mutations in the SERAC1 gene. Multiple body systems are affected with manifestations including 3-methylglutaconic aciduria, deafness, encephalopathy and Leigh-like disease.	Preferred (foundation metadata concept)
A rare autosomal recessive iron metabolism disorder characterized by iron deficiency anemia (hypochromic, microcytic) that is often unresponsive to oral iron intake and partially responsive to parenteral iron treatment. 50 patients from 32 families of different ethnic origin have been described to date; however, it is likely that this condition is underdiagnosed. Most IRIDA patients have no major clinical signs, except for pallor, and have normal growth and development. IRIDA syndrome is due to mutations the TMPRSS6 gene encoding Matriptase 2, a transmembrane serine protease that plays an essential role in down-regulating hepcidin, the key regulator of iron homeostasis. Transmission is autosomal recessive.	Preferred (foundation metadata concept)
A rare autosomal recessive limb girdle muscular dystrophy with characteristics of childhood to adult onset of slowly progressive limb girdle muscular weakness often accompanied by calf hypertrophy and moderately elevated creatine kinase levels. Patients remain ambulatory but may variably present mild intellectual disability, seizures, migraine or cardiopulmonary involvement. Occurrence of dilated cardiomyopathy has been reported. Brain MRI typically shows hyperintensity in T2-weighted sequences. Muscle biopsy commonly reveals dystrophic features.	Preferred (foundation metadata concept)
A rare autosomal recessive limb girdle muscular dystrophy with characteristics of infantile to adolescent onset of a milder form of limb-girdle muscular dystrophy with or without intellectual disability. Patients present variable proximal limb muscular weakness with calf hypertrophy and elevated serum creatine kinase.	Preferred (foundation metadata concept)
A rare autosomal recessive limb-girdle muscular dystrophy with characteristics of adult onset of progressive muscle weakness and atrophy in the proximal upper and lower limbs, leading to scapular winging and loss of independent ambulation. Respiratory function may become impaired in the course of the disease. Fatty degeneration of internal regions of thigh muscles sparing external areas has been reported, as well as a reduction of alpha-dystroglycan in muscle biopsies.	Preferred (foundation metadata concept)
A rare autosomal recessive microcephalic primordial dwarfism with characteristics of congenital microcephaly and craniofacial features associated with a spectrum of limb abnormalities ranging from mild to severe. Short stature is frequently observed and often is severe. The disorder is due to bi-allelic mutations in the downstream neighbor of SON, DONSON (21q22.11), a replisome component that stabilizes forks during genome replication.	Preferred (foundation metadata concept)
A rare autosomal recessive multiple congenital anomalies/dysmorphic syndrome with characteristics of developmental delay, variable intellectual disability, microcephaly, cerebellar hypoplasia, dysmorphic features (central incisors macrodontia and slender fingers), short stature and variable congenital anomalies. The disorder is due to biallelic variants in the BRF1 (14q32.33) gene; the pathogenic variants reported are missense variants, with only one frameshift mutation identified. All variants affect protein residues located within the cyclin 2 protein domain.	Preferred (foundation metadata concept)
A rare autosomal recessive primary immunodeficiency characterized by infancy onset of severe inflammatory bowel disease with life-threatening diarrhea and failure to thrive, oral aphthous ulcers, and recurrent severe upper and lower respiratory tract infections with finger clubbing. Laboratory examination reveals increased IgE and decreased IgG levels, as well as reduced numbers of circulating CD19+ B-cells including IgM+ naive and class-switched IgG memory B-cells, with a concomitant increase in transitional B-cells, while T-cell numbers and function are normal.	Preferred (foundation metadata concept)
A rare autosomal recessive primary immunodeficiency characterized by susceptibility to Epstein-Barr virus (EBV)-associated lymphoproliferative disorders such as malignant B-cell proliferation, Hodgkin lymphoma, B-cell lymphoma, lymphoid granulomatosis, hemophagocytic lymphohistiocytosis and smooth muscle tumor. Patients present with persistent symptoms of infectious mononucleosis including recurrent febrile episodes, lymphadenopathy and hepatosplenomegaly accompanied by a high EBV viral load in the blood. Additional manifestations are autoimmune diseases like hemolytic anemia or renal disease.	Preferred (foundation metadata concept)
A rare autosomal recessive primary immunodeficiency characterized by susceptibility to Epstein-Barr virus (EBV)-related disorders (B-cell lymphoproliferative disorders including Hodgkin lymphoma) as well as dysgammaglobulinemia and recurrent infections. Patients can present with recurrent fever, lymphadenopathy, hepatosplenomegaly, Behçet-like stomatitis, pharyngitis, tonsillitis, adenitis and viral encephalitis.	Preferred (foundation metadata concept)
A rare autosomal recessive syndromic cerebellar ataxia with the association of early-onset cerebellar ataxia, hearing loss and blindness. Patients may also present demyelinating peripheral motor neuropathy. Cerebral MRI shows alterations of the cerebellar white matter without cerebellar atrophy.	Preferred (foundation metadata concept)
A rare autosomal recessive urea cycle defect characterized biologically by hyperammonemia and clinically by progressive lethargy, poor feeding and vomiting. There is evidence that this disease is caused by homozygous or compound heterozygous mutation in the ASS1 gene on chromosome 9q34.	Preferred (foundation metadata concept)
A rare autosomal recessively inherited disorder of ketone body metabolism, characterized clinically by episodes of decompensation (often associated with gastroenteritis or fasting) that present with vomiting, lethargy, hepatomegaly, non ketotic hypoglycemia and in rare cases coma. Patients are mostly asymptomatic between acute episodes. This disease requires an early diagnosis in order to avoid hypoglycemic crisis that can lead to permanent brain damage or death. Caused by homozygous or compound heterozygous mutation in the HMGCS2 gene on chromosome 1p12.	Preferred (foundation metadata concept)
A rare autosomal trisomy with characteristics of reduced fetal movements and intrauterine growth retardation, low birth weight and multiple congenital anomalies. The latter include amongst others facial dysmorphism (hypertelorism, cleft lip/palate, micrognathia, low hairline, and small low-set and posteriorly rotated ears), head circumference below average, deformities of the hands (camptodactyly) and feet, marked hypertrichosis and anomalies of the brain, heart, and lungs. Lethality appears to depend on the degree of mosaicism.	Preferred (foundation metadata concept)
A rare axonal hereditary motor and sensory neuropathy characterized by adult onset of recurrent pain in legs with or without cramps, progressive loss of deep tendon reflexes and vibration sense, paresthesia in the feet and later in the hands. Patients often experience sleep disturbances and mild sensory ataxia.	Preferred (foundation metadata concept)
A rare axonal hereditary motor and sensory neuropathy characterized by progressive distal muscle weakness and atrophy of variable onset and severity. Patients present with postural instability, gait and running difficulties, decreased deep tendon reflexes, foot deformities, fine motor impairment and distal sensory impairment. Dysarthria, dysphagia and mild cognitive and behavioral abnormalities have also been reported.	Preferred (foundation metadata concept)
A rare axonal hereditary motor and sensory neuropathy with characteristics of adult onset of slowly progressive distal muscle weakness and atrophy, decreased deep tendon reflexes of lower limbs and mild distal sensory loss leading to gait difficulties in most patients.	Preferred (foundation metadata concept)
A rare axonal hereditary motor and sensory neuropathy with characteristics of infantile onset of slowly progressive distal motor weakness and atrophy (more severe in legs and moderate in arms) with mildly delayed motor development, hypotonia, and distal sensory impairment of all sensory modalities.	Preferred (foundation metadata concept)
A rare axonal hereditary motor and sensory neuropathy with characteristics of progressive axonal neuropathy with limb weakness and severe distal sensory loss in all limbs and acrodystrophic changes leading to painless non-healing ulcers, osteomyelitis, contractures and mutilating lesions with loss of terminal phalanges. One family with three affected siblings is described and there have been no further descriptions in the literature since 1999.	Preferred (foundation metadata concept)
A rare axonal hereditary motor and sensory neuropathy with characteristics of slowly progressive distal muscle weakness and atrophy with or without sensory loss resulting in difficulty in walking, foot drop and pes cavus, that may be associated with pyramidal signs (extensor plantar responses, mild increase in tone, brisk tendon reflexes), muscle cramps, pain and spasticity.	Preferred (foundation metadata concept)
A rare axonal hereditary motor and sensory neuropathy with early onset (less than 10 years) progressive distal muscle weakness and wasting of the lower limbs and later, to a lesser extent the upper limbs resulting in foot and wrist drop, areflexia, skeletal deformities (kyphoscoliosis, pes cavus with flattening, joint contractures), mild sensory impairment with vibration sense reduced to a greater extent than pain, optic atrophy and hearing loss. Wheelchair dependence by adolescence is usual and respiratory impairment with diaphragmatic paralysis may develop.	Preferred (foundation metadata concept)
A rare bacterial infectious disease caused by extraintestinal infection of non-typhoidal serotypes of Salmonella enterica in patients with underlying HIV infection, malaria or malignancy. It has a high mortality rate and patients typically present with fever, pallor and respiratory signs (cough, tachypnea, pneumonia). Gastrointestinal manifestations (diarrhea, vomiting, abdominal pain) are not common. Occasionally, organ abscesses, septic shock and meningitis may be observed.	Preferred (foundation metadata concept)
A rare bacterial pulmonary infectious disease caused by a Panton-Valentine leukocidin-producing Staphylococcus aureus strain, characterized by severe respiratory failure, extensive, rapidly progressing pneumonia and hemorrhagic lung necrosis. Patients typically present with influenza-like symptoms, such as fever, cough, and chest pain, as well as hemoptysis, hypotension, leukopenia, and severe respiratory symptoms that rapidly evolve to acute respiratory distress syndrome and septic shock. High mortality is associated.	Preferred (foundation metadata concept)
A rare balance disorder with characteristic of auditory and/or vestibular symptoms. This condition is caused by an opening (dehiscence) in the bone that overlays the superior semicircular canal within the inner ear.	Preferred (foundation metadata concept)
A rare benign autosomal dominant disorder of fat tissue proliferation with characteristic of presence of multiple small lipomas of 2 to 5 cm in diameter in the middle third of the body (i.e. the forearms, trunk, and upper thighs), and which are generally painless and can be easily removed provided that they are not too numerous or confluent. There have been no further descriptions in the literature since 1984.	Preferred (foundation metadata concept)
A rare benign congenital genetic skin disorder with characteristics of permanent and asymptomatic erythema of the palmar and less frequently the solar surfaces. In most cases, it presents with sharply demarcated redness of the thenar and hypothenar eminences, as well as the palmar aspect of the phalanges, with scattered telangiectasia spots that do not cause any discomfort (pain, itching or burning) to the patient.	Preferred (foundation metadata concept)
A rare benign congenital malformation of the lymphatic system with a polypoidal, variable-sized, soft tissue mass located in the larynx. Most lesions manifest by the second year of life and depending on the size, patients may present with changes in voice, dysphagia, stridor, airway obstruction and/or respiratory distress. Cystic hygroma of the neck is frequently associated.	Preferred (foundation metadata concept)
A rare benign cutaneous neoplasm containing keratinized epithelium and dermal derivatives, such as hair follicles, sweat and sebaceous glands, smooth muscle or fibroadipose tissue which usually manifests as a slow-growing, painless mass in the submandibular or sublingual space. Depending on the location, and especially after sudden enlargement, it can cause dyspnea, dysphagia or dysphonia.	Preferred (foundation metadata concept)
A rare benign cutaneous neoplasm containing keratinized epithelium and dermal derivatives, such as hair follicles, sweat and sebaceous glands, smooth muscle or fibroadipose tissue, which usually manifests as a firm, nonpulsatile mass, often with a sinus opening or a hair-bearing punctum, most commonly located in the periorbital and nasal area.	Preferred (foundation metadata concept)
A rare benign eye tumor characterized by the presence of glial cells, vascular tissue and sheets of pigment epithelial cells lacking the distribution and organization of the normal retina and retinal pigment epithelium. The lesion is most commonly found unilaterally as a slightly elevated mass in a peripapillary location but can also occur in the macula or the retinal periphery. It is sometimes associated with neurofibromatosis type 1 or 2, nevoid basal cell carcinoma syndrome, or branchio-oculo-facial syndrome. Patients may be asymptomatic or present with progressive loss of vision.	Preferred (foundation metadata concept)
A rare benign genetic skin disease with characteristics of numerous, painless, encapsulated lipomas located in the subcutaneous adipose tissue of the trunk and extremities, with relative sparing of the neck and shoulders. Association with gastroduodenal lipomatosis, brain anomalies or lipomatosis, and refractory epilepsy has been reported.	Preferred (foundation metadata concept)
A rare benign highly vascularized tumor of the central nervous system most often located in the cerebellum or spinal cord. The disease presents in adulthood and manifests with dizziness, nausea, malaise, headache, bladder or bowel dysfunction, numbness, weakness and pain in the upper or lower extremities, and is often associated with von Hippel-Lindau disease. Exceptional cases of hemangioblastoma arising outside of the central nervous system have been reported.	Preferred (foundation metadata concept)
A rare benign liver tumor of childhood that usually presents before the age of 2. The tumor is of mesenchymal origin and has a variable clinical presentation.	Preferred (foundation metadata concept)
A rare benign nail tumor originating in the nail matrix characterized by localized or diffuse thickening of the nail plate, increased transverse or longitudinal overcurvature, a yellow longitudinal band of variable width, swelling of the proximal nail fold, multiple splinter hemorrhages and the presence of honeycomb-like cavities in the distal margin of the nail plate. Nail dystrophy and dorsal pterygium may be associated. Occasionally a pigmented lesion has been reported.	Preferred (foundation metadata concept)
A rare benign nail tumor originating in the nail matrix characterized by localized pachyonychia and variable degrees of pigmentation: pigmented, melanocytic (common, longitudinal melanonychia that may simulate a foreign body) or hypopigmented. Histopathology demonstrates a purely epithelial tumor with endo-keratinization in the deep portion and concentrically arranged nests of pre-keratogenous and keratogenous cells.	Preferred (foundation metadata concept)
A rare benign neoplasm of the central nervous system characterized by the development of multiple or rarely solitary meningioma in two or more blood relatives without other apparent syndromic manifestations. Depending on the localization, growth rate and size of the tumors, patients can present with subtle, gradually worsening or abrupt and severe neurological compromise or can be completely asymptomatic.	Preferred (foundation metadata concept)
A rare benign neoplasm of the liver. Mean age at diagnosis is 34 years and the disease rarely occurs in children. Most patients are asymptomatic and lesions are found incidentally during laparotomy or radiologic studies performed for other reasons. In most cases, adenomas develop for unclear reasons in an otherwise healthy liver. Some predisposing conditions have been identified: prolonged oral contraceptive use, glycogenosis type III and IV, congenital portocaval shunt and, in males, use of anabolic steroids. Malignant transformation is rare and the long-term prognosis is good.	Preferred (foundation metadata concept)
A rare benign non-Langerhans cell histiocytosis characterized by childhood or adolescence onset of multiple, small, asymptomatic, slowly progressing, skin-colored to red-brown papules with predilection for the face, dorsal hands, forearms and legs, without associated mucosal or visceral involvement. Histologically, papules are well-circumscribed, unencapsulated, nodular aggregates of histiocytes with abundant mucin in the upper and mid dermis.	Preferred (foundation metadata concept)
A rare benign ovarian stromal tumor characterized by a stromal neoplasm with variable microcystic morphology, low mitotic activity and diffuse nuclear beta-catenin and cyclin D1 immunoreactivity, while inhibin and calretinin are not expressed. Patients most commonly present with symptoms of a unilateral pelvic mass. Hormonal manifestations are usually absent. The tumor may be associated with familial adenomatous polyposis.	Preferred (foundation metadata concept)
A rare benign ovarian tumor characterized by a benign pelvic mass associated with right-sided pleural effusion, but without ascites. The pleural effusion resolves after resection of the tumor.	Preferred (foundation metadata concept)
A rare benign peripheral nerve sheath tumor disorder characterized by multiple painful mucin-rich plexiform neurofibromas located in the orbits, cranium, large spinal nerves and mucosa. Also associated with a marfanoid habitus, enlarged corneal nerves, congenital neuronal migration anomalies and facial dysmorphism which includes ptosis, proptosis, prominent nose, full lips, gingival hyperplasia and multiple subcutaneous and submucosal nodules in the lips and sublingual zone.	Preferred (foundation metadata concept)
A rare benign pseudocyst found on the floor of the mouth that is associated with mucus extravasation that can occur spontaneously or as the result of trauma or obstruction to the salivary gland excretory duct and spillage of mucin into the surrounding soft tissues.	Preferred (foundation metadata concept)
A rare benign pseudocyst that extends into the submandibular space and is associated with mucus extravasation that can occur spontaneously or as the result of trauma or obstruction to the salivary gland excretory duct and spillage of mucin into the surrounding soft tissues.	Preferred (foundation metadata concept)
A rare benign retinal vascular disease characterized by solitary or multiple, unilateral or bilateral, intra-retinal tumor(s), usually located in the peripheral infero-temporal quadrant, and often associated with sub and intraretinal exudates, epiretinal membranes, exudative retinal detachment and cystoid macular edema, as well as, occasionally, retinal and vitreous hemorrhage. Patients may present with visual loss, floaters, and/or photopsia. Association with various conditions, such as retinitis pigmentosa, congenital retinal toxoplasmosis, retinopathy of prematurity or coloboma has been reported.	Preferred (foundation metadata concept)
A rare benign sex cord-stromal neoplasm with a typically unilateral location in the ovary. The disease has characteristics of mixed features of both fibroma and thecoma. Patients may be asymptomatic or may present with pelvic/abdominal pain and/or distension and occasionally, with post-menopausal bleeding. Large neoplasms of greater than 10cm are often associated with pleural effusion and ascites (Meig syndrome triad).	Preferred (foundation metadata concept)
A rare benign skin tumor disorder characterized by the presence of congenital, large (few centimeters), elevated, well-circumscribed, pink-tan, multinodular, non-ulcerative, bosselated-surface skin lesions located on the neck, scalp or hand and which enlarge with time. Histologically, hamartomatous proliferation containing irregularly arranged, malformed hair follicles in various stages of development, surrounded by fibrous tissue and densely distributed within the dermis is observed.	Preferred (foundation metadata concept)
A rare benign tumor characterized by the formation of intra-abdominal multilocular cystic masses. It occurs more frequently in women of child-bearing age. In women, the masses are generally located on the peritoneal surface of the uterus and rectum, while in men they are generally located on the peritoneal surface of the bladder and rectum. The tumor can also spread into the upper portions of the peritoneal cavity. Appears to originate from the peritoneal mesothelium.There is no relation with asbestos exposure. Invasive or malignant progression has been described.	Preferred (foundation metadata concept)
A rare benign tumor-like lesion. Approximately 140 cases have been reported worldwide, with a higher prevalence for male adults of Asian origin and subjects affected by systemic diseases such as rheumatoid arthritis. There are two clinical presentations. The active form most commonly manifests with abdominal pain, fever and loss of body weight. The second form is usually clinically silent. The etiopathogenesis remains unclear.	Preferred (foundation metadata concept)
A rare biliary tract disease with characteristics of loss of interlobular bile ducts resulting in chronic cholestasis, without any known cause. Loss of less than 50% of interlobular bile ducts is associated with a mild disease course, while loss of the majority of ducts results in a severe form, potentially leading to cirrhosis and liver failure. Patients typically present as young or middle-aged adults with episodic jaundice, pruritus and elevated liver enzymes.	Preferred (foundation metadata concept)
A rare biliary tract disease with characteristics of stone formation within the intrahepatic bile ducts without any known cause, leading to bile stasis and repeated cholangitic episodes. The condition is rare in the Western world but frequent in eastern Asia. Patients usually present before the age of forty with right upper quadrant pain, jaundice, and/or fever. Stones are typically calcium bilirubinate (pigment) stones and bacteria are present in the bile in almost all cases. Complications are biliary strictures, liver abscess, liver fibrosis and secondary biliary cirrhosis. Association with cholangiocarcinoma has also been reported.	Preferred (foundation metadata concept)
A rare biological anomaly defined as high serum ferritin levels without elevations of transferrin saturation, tissue or serum iron and with characteristics of an apparently asymptomatic clinical phenotype.	Preferred (foundation metadata concept)
A rare bone development disorder with characteristics of intellectual disability, short stature, turribrachycephaly, facial dysmorphism (severe hypertelorism, hypoplasia of supraorbital ridges, abnormal ears, and micrognathia), bony defects of the occiput, and digital anomalies (including syndactyly, oligodactyly, and/or brachydactyly). Urethral atresia has also been reported. There have been no further descriptions in the literature since 1987.	Preferred (foundation metadata concept)
A rare bone developmental disorder belonging to a group of oromandibular limb hypogenesis syndromes. The major anomalies occurring commonly in this group are hypoplasia of the mandible, syndactyly and ectrodactyly, small mouth, cleft palate, hypodontia and facial paralysis. Patients with Charlie M syndrome also present with hypertelorism, absent or conically crowned incisors and variable degrees of hypodactyly of the hands and feet. There have been no further descriptions in the literature since 1976.	Preferred (foundation metadata concept)
A rare bone disease and a form of microcephalic primordial dwarfism with characteristics of severe pre and postnatal growth retardation, with marked microcephaly in proportion to body size, skeletal dysplasia, abnormal dentition, insulin resistance and increased risk for cerebrovascular disease. Caused by mutations in PCNT (21q22.3), encoding pericentrin, which anchors a wide range of centrosomal proteins and protein complexes during cell division. Disruption of pericentrin is thought to cause mitotic spindle defects, and impaired cell proliferation. Transmission is autosomal recessive.	Preferred (foundation metadata concept)
A rare bone disease characterized by secondary hyperparathyroidism in patients with chronic renal failure, caused by improper treatment in the early stages of the disease with retention of phosphorus, vitamin D deficiency and disturbed calcium-phosphorus metabolism, which result in increased parathyroid hormone levels. Patients present with short stature, severe changes of the skull and jaws as well as other skeletal deformities, dental anomalies, brown tumors in the mouth, hearing loss, and neuropsychiatric disorders.	Preferred (foundation metadata concept)
A rare bone disease with anomaly of both index fingers (accessory ossicle at the metacarpophalangeal joint with resulting ulnar deviation) and typically in association with Pierre Robin sequence comprising micrognathia, cleft palate and glossoptosis. In 80% of cases, the digital abnormality is associated with Pierre Robin sequence. Additional frequently reported congenital malformations include cardiac defects such as ventricular septal defect and interatrial communication. Homozygous and compound heterozygous mutations in TGDS (13q32.1) have been implicated as causal in this syndrome. Transmission is autosomal recessive. Genetic counseling is recommended.	Preferred (foundation metadata concept)
A rare bone disease with characteristics of bone resorption affecting the distal phalanx, most commonly the terminal tuft, in the absence of a known cause. Patients present with shortening of the affected fingers or toes, associated with nail abnormalities (dystrophic or hypertrophic nails) and skin changes (such as ulceration or pigment anomalies).	Preferred (foundation metadata concept)
A rare bone disease with characteristics of spontaneous adult-onset tarsal navicular osteonecrosis. Patients present with chronic mid and hindfoot pain, swelling and tenderness over the dorsomedial aspect of the midfoot, flattening of the medial longitudinal arch, and pes planovarus. Radiographic findings include comma-shaped deformity due to collapse of the lateral part of the navicular bone and medial or dorsal protrusion of a portion or the entire bone. The condition may be bilateral or asymmetric and associated with pathological fractures.	Preferred (foundation metadata concept)
A rare brain inflammatory disease with characteristics of thickening of the dura mater of the cranium or spine with at least two histopathological features of IgG4 (immunoglobulin G4) related disease: dense lymphoplasmacytic infiltrate, storiform fibrosis, and/or obliterative phlebitis. Patients typically have non-specific cerebrospinal fluid findings, and might be without systemic involvement or serum IgG4 elevation. Clinical manifestations are caused by mechanical compression of nerve or vascular structure, leading to functional deficit, most commonly headache, cranial nerve palsies, vision problems and motor weakness.	Preferred (foundation metadata concept)
A rare branchial arches and limb primordia development disorder with characteristics of variable degrees of uni or bilateral craniofacial malformation and radial defects that result in extremely variable phenotypic manifestations. Characteristic features include low postnatal weight, short stature, vertebral defects, hearing loss, and facial dysmorphism (including facial asymmetry, external, middle and inner ear malformations, orofacial clefts, and mandibular hypoplasia). These features are invariably associated with radial defects, such as preaxial polydactyly, thumb and/or radius hypoplasia/agenesis, or triphalangeal thumb. Cardiac, pulmonary, renal, and central nervous system involvement has also been reported.	Preferred (foundation metadata concept)
A rare breast malformation disorder characterized by unilateral or bilateral, symmetrical or asymmetrical, uncontrolled, rapid and massive enlargement of the breast(s) in peripubertal females, occurring in various members of a family. Additional associated manifestations may include skin hyperemia, dilated subcutaneous veins, skin necrosis, kyphosis, lordosis and anonychia. Growth and development are otherwise normal.	Preferred (foundation metadata concept)

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Reference Sets

Reference set descriptor

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Id	Description	Lang	Type	Status	Case?	Module
900000000001115012	United States of America English language reference set	en	Synonym (core metadata concept)	Active	Entire term case sensitive (core metadata concept)	SNOMED CT model component module (core metadata concept)
900000000001116013	US English	en	Synonym (core metadata concept)	Active	Entire term case sensitive (core metadata concept)	SNOMED CT model component module (core metadata concept)
900000000001117016	United States of America English language reference set (foundation metadata concept)	en	Fully specified name	Active	Entire term case sensitive (core metadata concept)	SNOMED CT model component module (core metadata concept)