| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Birth head circumference equal to or greater than 97th centile (finding) | Interprets | True | Birth head circumference | Inferred relationship | Some | 2 | 
| Congenital microcephaly (disorder) | Interprets | True | Birth head circumference | Inferred relationship | Some | 2 | 
| Osteogenesis imperfecta, recessive perinatal lethal, with microcephaly AND cataracts | Interprets | True | Birth head circumference | Inferred relationship | Some | 5 | 
| Amish lethal microcephaly (disorder) | Interprets | True | Birth head circumference | Inferred relationship | Some | 3 | 
| Achalasia microcephaly syndrome (disorder) | Interprets | True | Birth head circumference | Inferred relationship | Some | 4 | 
| Agammaglobulinemia, microcephaly, craniosynostosis, severe dermatitis syndrome (disorder) | Interprets | True | Birth head circumference | Inferred relationship | Some | 5 | 
| Stimmler syndrome | Interprets | True | Birth head circumference | Inferred relationship | Some | 6 | 
| 3-phosphoglycerate dehydrogenase deficiency infantile form (disorder) | Interprets | True | Birth head circumference | Inferred relationship | Some | 2 | 
| Autosomal recessive chorioretinopathy and microcephaly syndrome (disorder) | Interprets | True | Birth head circumference | Inferred relationship | Some | 4 | 
| Anonychia with microcephaly syndrome (disorder) | Interprets | True | Birth head circumference | Inferred relationship | Some | 3 | 
| Aphalangy and syndactyly with microcephaly syndrome (disorder) | Interprets | True | Birth head circumference | Inferred relationship | Some | 4 | 
| Autosomal dominant primary microcephaly | Interprets | True | Birth head circumference | Inferred relationship | Some | 2 | 
| Cleft palate, large ears, small head syndrome | Interprets | True | Birth head circumference | Inferred relationship | Some | 4 | 
| Congenital intrauterine infection-like syndrome (disorder) | Interprets | True | Birth head circumference | Inferred relationship | Some | 3 | 
| Cutaneous mastocytosis, short stature, hearing loss syndrome (disorder) | Interprets | True | Birth head circumference | Inferred relationship | Some | 6 | 
| Autosomal recessive primary microcephaly (disorder) | Interprets | True | Birth head circumference | Inferred relationship | Some | 2 | 
| Congenital microcephaly, severe encephalopathy, progressive cerebral atrophy syndrome | Interprets | True | Birth head circumference | Inferred relationship | Some | 3 | 
| Epilepsy, microcephaly, skeletal dysplasia syndrome (disorder) | Interprets | True | Birth head circumference | Inferred relationship | Some | 5 | 
| Diffuse cerebral and cerebellar atrophy, intractable seizures, progressive microcephaly syndrome | Interprets | True | Birth head circumference | Inferred relationship | Some | 4 | 
| Extrasystoles, short stature, hyperpigmentation, microcephaly syndrome (disorder) | Interprets | True | Birth head circumference | Inferred relationship | Some | 5 | 
| Epiphyseal dysplasia, microcephalus, nystagmus syndrome (disorder) | Interprets | True | Birth head circumference | Inferred relationship | Some | 5 | 
| Goldberg Shprintzen megacolon syndrome (disorder) | Interprets | True | Birth head circumference | Inferred relationship | Some | 7 | 
| Filippi syndrome (disorder) | Interprets | True | Birth head circumference | Inferred relationship | Some | 5 | 
| Hydromicrocephaly | Interprets | True | Birth head circumference | Inferred relationship | Some | 3 | 
| Hypogonadotropic hypogonadism, severe microcephaly, sensorineural hearing loss, dysmorphism syndrome (disorder) | Interprets | True | Birth head circumference | Inferred relationship | Some | 8 | 
| Hall Riggs syndrome (disorder) | Interprets | True | Birth head circumference | Inferred relationship | Some | 4 | 
| Jawad syndrome | Interprets | True | Birth head circumference | Inferred relationship | Some | 3 | 
| Intellectual disability, feeding difficulties, developmental delay, microcephaly syndrome | Interprets | True | Birth head circumference | Inferred relationship | Some | 4 | 
| Intellectual disability, hypoplastic corpus callosum, preauricular tag syndrome (disorder) | Interprets | True | Birth head circumference | Inferred relationship | Some | 4 | 
| Microcephalic primordial dwarfism Alazami type (disorder) | Interprets | True | Birth head circumference | Inferred relationship | Some | 4 | 
| Microcephalic primordial dwarfism Dauber type | Interprets | True | Birth head circumference | Inferred relationship | Some | 4 | 
| Lowry MacLean syndrome (disorder) | Interprets | True | Birth head circumference | Inferred relationship | Some | 5 | 
| Microcephalic osteodysplastic dysplasia Saul Wilson type (disorder) | Interprets | True | Birth head circumference | Inferred relationship | Some | 5 | 
| Microcephalic osteodysplastic primordial dwarfism types I and III (disorder) | Interprets | True | Birth head circumference | Inferred relationship | Some | 4 | 
| Microcephalic primordial dwarfism Montreal type | Interprets | True | Birth head circumference | Inferred relationship | Some | 4 | 
| Microcephalus cardiomyopathy syndrome (disorder) | Interprets | True | Birth head circumference | Inferred relationship | Some | 3 | 
| Microcephalus cleft palate syndrome (disorder) | Interprets | True | Birth head circumference | Inferred relationship | Some | 4 | 
| Microcephalic primordial dwarfism of Toriello type (disorder) | Interprets | True | Birth head circumference | Inferred relationship | Some | 3 | 
| Hadziselimovic syndrome | Interprets | True | Birth head circumference | Inferred relationship | Some | 6 | 
| Microcephalus co-occurrent with cervical spine fusion anomaly (disorder) | Interprets | True | Birth head circumference | Inferred relationship | Some | 4 | 
| Microcephalus microcornea syndrome of Seemanova type (disorder) | Interprets | True | Birth head circumference | Inferred relationship | Some | 1 | 
| Microcephalus with albinism and digital anomaly syndrome (disorder) | Interprets | True | Birth head circumference | Inferred relationship | Some | 7 | 
| Microcephalus with brachydactyly and kyphoscoliosis syndrome (disorder) | Interprets | True | Birth head circumference | Inferred relationship | Some | 6 | 
| Microcephalus with cardiac defect and lung malsegmentation syndrome (disorder) | Interprets | True | Birth head circumference | Inferred relationship | Some | 4 | 
| Microcephalus, brain defect, spasticity, hypernatremia syndrome (disorder) | Interprets | True | Birth head circumference | Inferred relationship | Some | 4 | 
| Microcephalus, complex motor and sensory axonal neuropathy syndrome | Interprets | True | Birth head circumference | Inferred relationship | Some | 2 | 
| Microcephalus, cerebellar hypoplasia, cardiac conduction defect syndrome | Interprets | True | Birth head circumference | Inferred relationship | Some | 6 | 
| Microcephalus, hypergonadotropic hypogonadism, short stature syndrome (disorder) | Interprets | True | Birth head circumference | Inferred relationship | Some | 2 | 
| Microcephalus, glomerulonephritis, marfanoid habitus syndrome (disorder) | Interprets | True | Birth head circumference | Inferred relationship | Some | 4 | 
| Microcephaly, hypogammaglobulinemia, abnormal immunity syndrome (disorder) | Interprets | True | Birth head circumference | Inferred relationship | Some | 4 | 
| Microcephaly with deafness and intellectual disability syndrome (disorder) | Interprets | True | Birth head circumference | Inferred relationship | Some | 5 | 
| Microcephalus, lymphedema, chorioretinopathy syndrome | Interprets | True | Birth head circumference | Inferred relationship | Some | 2 | 
| Microcephaly with simplified gyral pattern | Interprets | True | Birth head circumference | Inferred relationship | Some | 3 | 
| Microcephaly, seizure, intellectual disability, heart disease syndrome (disorder) | Interprets | True | Birth head circumference | Inferred relationship | Some | 3 | 
| Microcephaly, microphthalmia, ectrodactyly of lower limbs and prognathism syndrome (disorder) | Interprets | True | Birth head circumference | Inferred relationship | Some | 1 | 
| Microcephaly-capillary malformation syndrome | Interprets | True | Birth head circumference | Inferred relationship | Some | 3 | 
| Neu-Laxova syndrome | Interprets | True | Birth head circumference | Inferred relationship | Some | 5 | 
| Nijmegen breakage syndrome-like disorder (disorder) | Interprets | True | Birth head circumference | Inferred relationship | Some | 4 | 
| Microcephaly, polymicrogyria, corpus callosum agenesis syndrome (disorder) | Interprets | True | Birth head circumference | Inferred relationship | Some | 3 | 
| Oculocerebrofacial syndrome Kaufman type (disorder) | Interprets | True | Birth head circumference | Inferred relationship | Some | 4 | 
| Oro-facial digital syndrome type 14 | Interprets | True | Birth head circumference | Inferred relationship | Some | 7 | 
| Oculopalatocerebral syndrome (disorder) | Interprets | True | Birth head circumference | Inferred relationship | Some | 4 | 
| Prominent glabella with microcephaly and hypogenitalism syndrome (disorder) | Interprets | True | Birth head circumference | Inferred relationship | Some | 4 | 
| Primary microcephaly, mild intellectual disability, young-onset diabetes syndrome (disorder) | Interprets | True | Birth head circumference | Inferred relationship | Some | 3 | 
| Primary microcephaly, epilepsy, permanent neonatal diabetes syndrome | Interprets | True | Birth head circumference | Inferred relationship | Some | 4 | 
| Seckel syndrome | Interprets | True | Birth head circumference | Inferred relationship | Some | 4 | 
| Radioulnar synostosis with microcephaly and scoliosis syndrome (disorder) | Interprets | True | Birth head circumference | Inferred relationship | Some | 6 | 
| Pseudoprogeria syndrome (disorder) | Interprets | True | Birth head circumference | Inferred relationship | Some | 3 | 
| X-linked colobomatous microphthalmia, microcephaly, intellectual disability, short stature syndrome (disorder) | Interprets | True | Birth head circumference | Inferred relationship | Some | 2 | 
| THOC6-related developmental delay-microcephaly-facial dysmorphism syndrome | Interprets | True | Birth head circumference | Inferred relationship | Some | 3 | 
| Severe X-linked intellectual disability Gustavson type (disorder) | Interprets | True | Birth head circumference | Inferred relationship | Some | 5 | 
| Telomere maintenance 2-related intellectual disability, neurodevelopmental disorder (disorder) | Interprets | True | Birth head circumference | Inferred relationship | Some | 3 | 
| Severe growth deficiency, strabismus, extensive dermal melanocytosis, intellectual disability syndrome | Interprets | True | Birth head circumference | Inferred relationship | Some | 5 | 
| Microcephalic cortical malformations, short stature due to rotatin deficiency (disorder) | Interprets | True | Birth head circumference | Inferred relationship | Some | 3 | 
| X-linked microcephaly, growth retardation, prognathism, cryptorchidism syndrome (disorder) | Interprets | True | Birth head circumference | Inferred relationship | Some | 4 | 
| Microcephalic osteodysplastic primordial dwarfism type II | Interprets | True | Birth head circumference | Inferred relationship | Some | 3 | 
| Severe intellectual disability, agenesis of corpus callosum, facial dysmorphism, cerebellar ataxia syndrome (disorder) | Interprets | True | Birth head circumference | Inferred relationship | Some | 5 | 
| Microcephalic primordial dwarfism, insulin resistance syndrome (disorder) | Interprets | True | Birth head circumference | Inferred relationship | Some | 3 | 
| Ring finger protein 13-related severe early-onset epileptic encephalopathy (disorder) | Interprets | True | Birth head circumference | Inferred relationship | Some | 2 | 
| 19p13.3 microduplication syndrome (disorder) | Interprets | True | Birth head circumference | Inferred relationship | Some | 4 | 
| DNA replication fork stabilization factor DONSON-related microcephaly, short stature, limb abnormalities spectrum (disorder) | Interprets | True | Birth head circumference | Inferred relationship | Some | 3 | 
| NDE1-related microhydranencephaly | Interprets | True | Birth head circumference | Inferred relationship | Some | 5 | 
| Cerebellar-facial-dental syndrome (disorder) | Interprets | True | Birth head circumference | Inferred relationship | Some | 5 | 
| Microcephaly, intellectual disability, sensorineural hearing loss, epilepsy, abnormal muscle tone syndrome (disorder) | Interprets | True | Birth head circumference | Inferred relationship | Some | 8 | 
| Microcephaly, facial dysmorphism, ocular anomalies, multiple congenital anomalies syndrome (disorder) | Interprets | True | Birth head circumference | Inferred relationship | Some | 4 | 
| Short stature, skeletal dysplasia, retinal degeneration, intellectual disability, sensorineural hearing loss syndrome | Interprets | True | Birth head circumference | Inferred relationship | Some | 9 |