| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Congenitally small punctum lacrimale | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 4 | 
| Microspherophakia | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 4 | 
| Fetal microcephaly | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 2 | 
| Congenital bilateral perisylvian syndrome | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 3 | 
| Thrombocytopathy, asplenia and miosis | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 3 | 
| Neu-Laxova syndrome | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 3 | 
| Benign autosomal dominant microcephaly | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 2 | 
| Primary microcephaly | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 2 | 
| Microcephalic osteodysplastic dysplasia | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 1 | 
| Microcephalus | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 2 | 
| Secondary microcephaly | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 2 | 
| Microcephaly-capillary malformation syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Existential restriction modifier | 1 | 
| Amish lethal microcephaly | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 2 | 
| Osteogenesis imperfecta, recessive perinatal lethal, with microcephaly AND cataracts | Associated morphology | True | Congenital smallness | Inferred relationship | Existential restriction modifier | 1 | 
| Microcephaly, microphthalmia, ectrodactyly of lower limbs and prognathism syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Existential restriction modifier | 4 | 
| Microcephaly, microphthalmia, ectrodactyly of lower limbs and prognathism syndrome | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 6 | 
| Prominent glabella with microcephaly and hypogenitalism syndrome | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 3 | 
| Microphthalmos co-occurrent with congenital ocular coloboma | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 3 | 
| Microcephalus co-occurrent with cervical spine fusion anomaly | Associated morphology | True | Congenital smallness | Inferred relationship | Existential restriction modifier | 2 | 
| Microcephalic primordial dwarfism of Toriello type | Associated morphology | True | Congenital smallness | Inferred relationship | Existential restriction modifier | 1 | 
| SOX2 anophthalmia syndrome | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 2 | 
| Microcephalus microcornea syndrome of Seemanova type | Associated morphology | True | Congenital smallness | Inferred relationship | Existential restriction modifier | 2 | 
| Microcephalus microcornea syndrome of Seemanova type | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 3 | 
| Micromelic spondyloepimetaphyseal dysplasia | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 4 | 
| Oculocerebral dysplasia syndrome | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 2 | 
| Nanophthalmia | Associated morphology | True | Congenital smallness | Inferred relationship | Existential restriction modifier | 1 | 
| Microcephaly with deafness and intellectual disability syndrome | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 5 | 
| Microcornea with glaucoma and absent frontal sinus syndrome | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 2 | 
| Microphthalmia with ankyloblepharon and intellectual disability syndrome | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 2 | 
| Aphalangy and syndactyly with microcephaly syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Existential restriction modifier | 3 | 
| Autosomal recessive primary microcephaly | Associated morphology | True | Congenital smallness | Inferred relationship | Existential restriction modifier | 1 | 
| Unilateral polymicrogyria | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 2 | 
| Micromelia | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 4 | 
| Achalasia microcephaly syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Existential restriction modifier | 2 | 
| Syndromic microphthalmia due to orthodenticle homeobox 2 mutation | Associated morphology | True | Congenital smallness | Inferred relationship | Existential restriction modifier | 1 | 
| Radioulnar synostosis with microcephaly and scoliosis syndrome | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 6 | 
| Microcephalus with cardiac defect and lung malsegmentation syndrome | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 5 | 
| Microcephalus cardiomyopathy syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Existential restriction modifier | 2 | 
| Microcephalus with cardiac defect and lung malsegmentation syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Existential restriction modifier | 3 | 
| Microcephalus and intellectual disability with phalangeal and neurological anomaly syndrome | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 5 | 
| Microcephalus with brachydactyly and kyphoscoliosis syndrome | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 8 | 
| Microcephalus cleft palate syndrome | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 4 | 
| Microcephalus with albinism and digital anomaly syndrome | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 12 | 
| Microcornea with corectopia and macular hypoplasia syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Existential restriction modifier | 1 | 
| Microcephalus facio-cardio-skeletal syndrome Hadziselimovic type | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 7 | 
| Microphthalmia with brain atrophy syndrome | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 2 | 
| Anonychia with microcephaly syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Existential restriction modifier | 2 | 
| Aphalangy and syndactyly with microcephaly syndrome | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 5 | 
| Anonychia with microcephaly syndrome | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 3 | 
| Arrhinia with choanal atresia and microphthalmia syndrome | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 5 | 
| Filippi syndrome | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 5 | 
| Hall Riggs syndrome | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 6 | 
| Short stature, pituitary and cerebellar defect and small sella turcica syndrome | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 3 | 
| Microphthalmia with linear skin defect syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Existential restriction modifier | 2 | 
| Congenital microgastria with limb reduction defect syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Existential restriction modifier | 2 | 
| Microtia | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 3 | 
| Bilateral microtia with deafness and cleft palate syndrome | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 7 | 
| Microcephaly, hypogammaglobulinemia, abnormal immunity syndrome | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 3 | 
| Bilateral microtia with deafness and cleft palate syndrome | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 6 | 
| Microphthalmia with linear skin defect syndrome | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 3 | 
| Lowry MacLean syndrome | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 5 | 
| Unilateral polymicrogyria | Associated morphology | True | Congenital smallness | Inferred relationship | Existential restriction modifier | 1 | 
| Epiphyseal dysplasia, microcephalus, nystagmus syndrome | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 3 | 
| Isotretinoin embryopathy-like syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Existential restriction modifier | 4 | 
| Megalencephaly, polymicrogyria, postaxial polydactyly, hydrocephalus syndrome | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 5 | 
| Hypertelorism with microtia and facial clefting syndrome | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 6 | 
| Megalencephaly, polymicrogyria, postaxial polydactyly, hydrocephalus syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Existential restriction modifier | 3 | 
| Oculocerebrofacial syndrome Kaufman type | Associated morphology | True | Congenital smallness | Inferred relationship | Existential restriction modifier | 3 | 
| Congenital intrauterine infection-like syndrome | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 3 | 
| Oculopalatocerebral syndrome | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 4 | 
| Cataract and microcornea syndrome | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 2 | 
| Congenital intrauterine infection-like syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Existential restriction modifier | 2 | 
| Intellectual disability, hypoplastic corpus callosum, preauricular tag syndrome | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 3 | 
| Juvenile cataract, microcornea, renal glucosuria syndrome | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 3 | 
| Agammaglobulinemia, microcephaly, craniosynostosis, severe dermatitis syndrome | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 6 | 
| Cutaneous mastocytosis, short stature, hearing loss syndrome | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 9 | 
| Glaucoma, ectopia, microspherophakia, stiff joint, short stature syndrome | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 6 | 
| Thickened earlobe with conductive deafness syndrome | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 5 | 
| Goldberg Shprintzen megacolon syndrome | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 7 | 
| Severe X-linked intellectual disability Gustavson type | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 4 | 
| Microcephaly, seizure, intellectual disability, heart disease syndrome | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 4 | 
| Microlissencephaly micromelia syndrome | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 7 | 
| Microcephalic osteodysplastic dysplasia Saul Wilson type | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 4 | 
| Renier Gabreels Jasper syndrome | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 2 | 
| Retinal degeneration, nanophthalmos, glaucoma syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Existential restriction modifier | 2 | 
| Renier Gabreels Jasper syndrome | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 3 | 
| Retinal degeneration, nanophthalmos, glaucoma syndrome | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 3 | 
| Microcephalic primordial dwarfism of Toriello type | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 2 | 
| Microtia, eye coloboma, imperforation of nasolacrimal duct syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Existential restriction modifier | 3 | 
| Microcephalic primordial dwarfism due to zinc finger protein 335 deficiency | Associated morphology | True | Congenital smallness | Inferred relationship | Existential restriction modifier | 1 | 
| Hyposmia, nasal and ocular hypoplasia, hypogonadotropic hypogonadism syndrome | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 6 | 
| Microspherophakia with metaphyseal dysplasia syndrome | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 3 | 
| Glaucoma, ectopia, microspherophakia, stiff joint, short stature syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Existential restriction modifier | 1 | 
| Microtia, eye coloboma, imperforation of nasolacrimal duct syndrome | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 4 | 
| Hyposmia, nasal and ocular hypoplasia, hypogonadotropic hypogonadism syndrome | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 5 | 
| Microcephalic osteodysplastic primordial dwarfism types I and III | Associated morphology | True | Congenital smallness | Inferred relationship | Existential restriction modifier | 2 | 
| Short rib polydactyly syndrome type I | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 5 | 
| Coxoauricular syndrome | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 4 | 
| Epilepsy, microcephaly, skeletal dysplasia syndrome | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 5 | 
| Alaninuria, microcephaly, dwarfism, enamel hypoplasia, diabetes mellitus syndrome | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 5 | 
| Alaninuria, microcephaly, dwarfism, enamel hypoplasia, diabetes mellitus syndrome | Associated morphology | False | Congenital smallness | Inferred relationship | Existential restriction modifier | 3 |