| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Severe neonatal onset encephalopathy with microcephaly | Associated morphology | False | Congenital smallness | Inferred relationship | Some | 1 | 
| MacDermot Winter syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 2 | 
| Hall Riggs syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 2 | 
| Microtia | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| Microcephalus and intellectual disability with phalangeal and neurological anomaly syndrome | Associated morphology | False | Congenital smallness | Inferred relationship | Some | 1 | 
| SOX2 anophthalmia syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| Microcephalus, glomerulonephritis, marfanoid habitus syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| Goldberg Shprintzen megacolon syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 3 | 
| MMEP syndrome | Associated morphology | False | Congenital smallness | Inferred relationship | Some | 1 | 
| Microspherophakia with metaphyseal dysplasia syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| Oculo-palato-cerebral syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| Hennekam Beemer syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 2 | 
| Microlissencephaly micromelia syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| Jawad syndrome | Associated morphology | False | Congenital smallness | Inferred relationship | Some | 2 | 
| Bilateral microtia with deafness and cleft palate syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 3 | 
| Juvenile cataract, microcornea, renal glucosuria syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| Short stature, pituitary and cerebellar defect and small sella turcica syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| Microcephaly with deafness and intellectual disability syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| Microspherophakia | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 2 | 
| Microphthalmia with brain atrophy syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| Say Barber Miller syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 2 | 
| Coxoauricular syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| Lowry Wood syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| Seemanova Lesny syndrome | Associated morphology | False | Congenital smallness | Inferred relationship | Some | 1 | 
| Thrombocytopathy, asplenia and miosis | Associated morphology | False | Congenital smallness | Inferred relationship | Some | 2 | 
| Arrhinia with choanal atresia and microphthalmia syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 2 | 
| Microcephaly with brachydactyly and kyphoscoliosis syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 2 | 
| Pseudoprogeria syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 4 | 
| Microcephaly with albinism and digital anomaly syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 2 | 
| Microcephalic osteodysplastic dysplasia Saul Wilson type | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 2 | 
| Microcephaly cardiomyopathy syndrome | Associated morphology | False | Congenital smallness | Inferred relationship | Some | 1 | 
| Bilateral microtia with deafness and cleft palate syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| Microcornea with glaucoma and absent frontal sinus syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| Cataract and microcornea syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| Intellectual disability, hypoplastic corpus callosum, preauricular tag syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| Hypertelorism with microtia and facial clefting syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| Epilepsy, microcephaly, skeletal dysplasia syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 3 | 
| Radioulnar synostosis with microcephaly and scoliosis syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| Microcephaly cleft palate syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 2 | 
| Microcephalus facio-cardio-skeletal syndrome Hadziselimovic type | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 3 | 
| Severe X-linked intellectual disability Gustavson type | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 2 | 
| Thickened earlobe with conductive deafness syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 2 | 
| Micromelic dwarfism Fryns type | Associated morphology | False | Congenital smallness | Inferred relationship | Some | 2 | 
| Microcephaly, seizure, intellectual disability, heart disease syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| Microphthalmia with ankyloblepharon and intellectual disability syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| Filippi syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 2 | 
| Mikati Najjar Sahli syndrome | Associated morphology | False | Congenital smallness | Inferred relationship | Some | 2 | 
| Lowry MacLean syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 4 | 
| Agammaglobulinaemia, microcephaly, craniosynostosis, severe dermatitis syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| Short rib polydactyly syndrome Saldino Noonan type | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 2 | 
| Microcephalus NOS | Associated morphology | False | Congenital smallness | Inferred relationship | Some |  | 
| Microphthalmos, unspecified | Associated morphology | False | Congenital smallness | Inferred relationship | Some | 1 | 
| Unspecified microphthalmos NOS | Associated morphology | False | Congenital smallness | Inferred relationship | Some | 1 | 
| Microphthalmos with other eye anomaly | Associated morphology | False | Congenital smallness | Inferred relationship | Some | 1 | 
| Microphthalmos NOS | Associated morphology | False | Congenital smallness | Inferred relationship | Some | 1 | 
| Microcephaly, polymicrogyria, corpus callosum agenesis syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| Macrosomia, microphthalmia, cleft palate syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| THO complex 6-related developmental delay, microcephaly, facial dysmorphism syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| Intellectual disability, feeding difficulties, developmental delay, microcephaly syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| Hypogonadotropic hypogonadism, severe microcephaly, sensorineural hearing loss, dysmorphism syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| Flat face, microstomia, ear anomaly syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 3 | 
| Microcornea, posterior megalolenticonus, persistent fetal vasculature, coloboma syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 2 | 
| Frontonasal dysplasia, severe microphthalmia, severe facial clefting syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 3 | 
| Autosomal dominant primary microcephaly | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| Microphthalmia, retinitis pigmentosa, foveoschisis, optic disc drusen syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 2 | 
| Colobomatous microphthalmia, obesity, hypogenitalism, intellectual disability syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 2 | 
| Microcornea, myopic chorioretinal atrophy, telecanthus syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| Primary microcephaly, mild intellectual disability, young-onset diabetes syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| Primary microcephaly, epilepsy, permanent neonatal diabetes syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| Reconstruction of microtia with microvascular anastomosis | Direct morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| Reconstruction of microtia with flap | Direct morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| Microphthalmos of right eye | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| Microphthalmos of left eye | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| Reconstruction of microtia with graft | Direct morphology | True | Congenital smallness | Inferred relationship | Some | 2 | 
| Diffuse cerebral and cerebellar atrophy, intractable seizures, progressive microcephaly syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 3 | 
| Occipital pachygyria and polymicrogyria | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| Congenital microcephaly, severe encephalopathy, progressive cerebral atrophy syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 2 | 
| Ichthyosis, short stature, brachydactyly, microspherophakia syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 4 | 
| Reduction anomaly of hypothalamus | Associated morphology | False | Congenital smallness | Inferred relationship | Some | 1 | 
| Megacystis, microcolon, hypoperistalsis syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 2 | 
| Seckel syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 2 | 
| Diastrophic dysplasia | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 2 | 
| Thrombocytopathy, asplenia and miosis | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 5 | 
| Neu-Laxova syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 2 | 
| Barber-Say syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 3 | 
| Bilateral microphthalmos with congenital coloboma | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 3 | 
| Bilateral microphthalmos with congenital coloboma | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 4 | 
| Microcornea of bilateral eyes | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| Microcornea of bilateral eyes | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 2 | 
| Bilateral microphthalmos | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| Bilateral microphthalmos | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 2 | 
| Common atrioventricular valve with unbalanced commitment of valve to right ventricle | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| Bilateral frontal polymicrogyria | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| Bilateral frontoparietal polymicrogyria | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| Bilateral generalised polymicrogyria | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| Bilateral parasagittal parieto-occipital polymicrogyria | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| Bilateral frontoparietal polymicrogyria | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 2 | 
| Bilateral parasagittal parieto-occipital polymicrogyria | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 2 | 
| Microcephaly with simplified gyral pattern | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| Microphthalmos due to branchio-oculo-facial syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| Microlissencephaly | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 |