| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Microlissencephaly | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| Microphthalmos due to Fryns syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| Microphthalmos due to Delleman syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| Micromelic dwarfism Fryn type | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| Congenital microcephaly | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| Stimmler syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| Jawad syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| Congenital microencephaly | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| Lissencephaly type 3 familial fetal akinesia sequence syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| Mikati Najjar Sahli syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| TELO2-related intellectual disability, neurodevelopmental disorder | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| Severe growth deficiency, strabismus, extensive dermal melanocytosis, intellectual disability syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| Colobomatous macrophthalmia with microcornea syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 3 | 
| Microcephalic cortical malformations, short stature due to RTTN deficiency | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| Macrocephaly, intellectual disability, neurodevelopmental disorder, small thorax syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| Reconstruction of microtia with free flap and microvascular anastomosis | Direct morphology | True | Congenital smallness | Inferred relationship | Some | 3 | 
| X-linked microcephaly, growth retardation, prognathism, cryptorchidism syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 2 | 
| Microcephalic osteodysplastic primordial dwarfism type II | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 2 | 
| Severe intellectual disability, agenesis of corpus callosum, facial dysmorphism, cerebellar ataxia syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| Microcephalic primordial dwarfism, insulin resistance syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| RNF13-related severe early-onset epileptic encephalopathy | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| 19p13.3 microduplication syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 3 | 
| Autosomal dominant myopia, midfacial retrusion, sensorineural hearing loss, rhizomelic dysplasia syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 2 | 
| Isolated microspherophakia | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 2 | 
| Microphthalmia, microtia, fetal akinesia syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 2 | 
| Microphthalmia, microtia, fetal akinesia syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 3 | 
| Microphthalmia, microtia, fetal akinesia syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 4 | 
| Syndromic nanophthalmos due to Kenny-Caffey syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| DONSON-related microcephaly, short stature, limb abnormalities spectrum | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 2 | 
| NDE1-related microhydranencephaly | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| Cerebellar-facial-dental syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 4 | 
| Microcephaly, intellectual disability, sensorineural hearing loss, epilepsy, abnormal muscle tone syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| Microspherophakia | Associated morphology | False | Congenital smallness | Inferred relationship | Some | 1 | 
| Congenital microhepatia | Associated morphology | False | Congenital smallness | Inferred relationship | Some | 3 | 
| Simple microphthalmos | Associated morphology | False | Congenital smallness | Inferred relationship | Some | 1 | 
| Congenital microcheilia | Associated morphology | False | Congenital smallness | Inferred relationship | Some | 1 | 
| Microgenia | Associated morphology | False | Congenital smallness | Inferred relationship | Some | 1 | 
| Congenital thread-like tail | Associated morphology | False | Congenital smallness | Inferred relationship | Some | 1 | 
| Unspecified microphthalmos NOS | Associated morphology | False | Congenital smallness | Inferred relationship | Some | 1 | 
| Microgyria | Associated morphology | False | Congenital smallness | Inferred relationship | Some | 1 | 
| Microphthalmos with other eye anomaly | Associated morphology | False | Congenital smallness | Inferred relationship | Some | 1 | 
| Microphthalmos | Associated morphology | False | Congenital smallness | Inferred relationship | Some | 1 | 
| Congenitally small punctum lacrimale | Associated morphology | False | Congenital smallness | Inferred relationship | Some | 1 | 
| Microphakia | Associated morphology | False | Congenital smallness | Inferred relationship | Some | 1 | 
| Microphthalmos associated with other anomalies of eye AND/OR adnexa | Associated morphology | False | Congenital smallness | Inferred relationship | Some | 1 | 
| Congenital small anus | Associated morphology | False | Congenital smallness | Inferred relationship | Some | 1 | 
| Congenital narrowed tail | Associated morphology | False | Congenital smallness | Inferred relationship | Some | 1 | 
| Hypoplasia of eye | Associated morphology | False | Congenital smallness | Inferred relationship | Some | 1 | 
| Microphthalmos, unspecified | Associated morphology | False | Congenital smallness | Inferred relationship | Some | 1 | 
| Microphthalmos NOS | Associated morphology | False | Congenital smallness | Inferred relationship | Some | 1 | 
| Congenital microgastria | Associated morphology | False | Congenital smallness | Inferred relationship | Some | 3 | 
| Microcolon | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| Microcornea | Associated morphology | False | Congenital smallness | Inferred relationship | Some | 1 | 
| Jeune thoracic dystrophy | Associated morphology | False | Congenital smallness | Inferred relationship | Some | 2 | 
| Lenz microphthalmia syndrome | Associated morphology | False | Congenital smallness | Inferred relationship | Some | 1 | 
| Congenital bilateral perisylvian syndrome | Associated morphology | False | Congenital smallness | Inferred relationship | Some | 1 | 
| Congenital bilateral perisylvian syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| Lenz microphthalmia syndrome | Associated morphology | False | Congenital smallness | Inferred relationship | Some | 1 | 
| Micromelia | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| Microgenia | Associated morphology | False | Congenital smallness | Inferred relationship | Some | 3 | 
| Osteogenesis imperfecta, recessive perinatal lethal, with microcephaly AND cataracts | Associated morphology | False | Congenital smallness | Inferred relationship | Some | 4 | 
| Cross syndrome | Associated morphology | False | Congenital smallness | Inferred relationship | Some | 4 | 
| Microcephalus | Associated morphology | False | Congenital smallness | Inferred relationship | Some | 1 | 
| Dysplasia of eye | Associated morphology | False | Congenital smallness | Inferred relationship | Some | 3 | 
| Simple microphthalmos | Associated morphology | False | Congenital smallness | Inferred relationship | Some | 2 | 
| Benign autosomal dominant microcephaly | Associated morphology | False | Congenital smallness | Inferred relationship | Some | 1 | 
| Secondary microcephaly | Associated morphology | False | Congenital smallness | Inferred relationship | Some | 1 | 
| Primary microcephaly | Associated morphology | False | Congenital smallness | Inferred relationship | Some | 1 | 
| Microphthalmos associated with other anomalies of eye AND/OR adnexa | Associated morphology | False | Congenital smallness | Inferred relationship | Some | 2 | 
| Microcephalic osteodysplastic dysplasia | Associated morphology | False | Congenital smallness | Inferred relationship | Some | 2 | 
| Fetal microcephaly | Associated morphology | False | Congenital smallness | Inferred relationship | Some | 1 | 
| Lenz microphthalmia syndrome | Associated morphology | False | Congenital smallness | Inferred relationship | Some | 2 | 
| Microphthalmos | Associated morphology | False | Congenital smallness | Inferred relationship | Some | 2 | 
| Neu-Laxova syndrome | Associated morphology | False | Congenital smallness | Inferred relationship | Some | 1 | 
| Hydromicrocephaly | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 2 | 
| Hypoplasia of eye | Associated morphology | False | Congenital smallness | Inferred relationship | Some | 2 | 
| Microgenia | Associated morphology | False | Congenital smallness | Inferred relationship | Some | 1 | 
| Amish lethal microcephaly | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| Lenz microphthalmia syndrome | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| Simple microphthalmos | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| Dysplasia of eye | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 2 | 
| Microphthalmos | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| Cross syndrome | Associated morphology | False | Congenital smallness | Inferred relationship | Some | 2 | 
| Hypoplasia of eye | Associated morphology | False | Congenital smallness | Inferred relationship | Some | 1 | 
| Microphthalmos associated with other anomalies of eye AND/OR adnexa | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| Congenital microcheilia | Associated morphology | False | Congenital smallness | Inferred relationship | Some | 2 | 
| Congenital small anus | Associated morphology | False | Congenital smallness | Inferred relationship | Some | 3 | 
| Uterus parvicollis | Associated morphology | False | Congenital smallness | Inferred relationship | Some | 2 | 
| Jeune thoracic dystrophy | Associated morphology | False | Congenital smallness | Inferred relationship | Some | 3 | 
| Microcephaly-capillary malformation syndrome | Associated morphology | False | Congenital smallness | Inferred relationship | Some | 2 | 
| Microphthalmos associated with other anomalies of eye AND/OR adnexa | Associated morphology | False | Congenital smallness | Inferred relationship | Some | 1 | 
| Benign autosomal dominant microcephaly | Associated morphology | False | Congenital smallness | Inferred relationship | Some |  | 
| Secondary microcephaly | Associated morphology | False | Congenital smallness | Inferred relationship | Some |  | 
| Congenital microcheilia | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| Uterus parvicollis | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| Microcornea | Associated morphology | False | Congenital smallness | Inferred relationship | Some | 3 | 
| Microgyria | Associated morphology | False | Congenital smallness | Inferred relationship | Some | 3 | 
| Microphakia | Associated morphology | False | Congenital smallness | Inferred relationship | Some | 3 | 
| Primary microcephaly | Associated morphology | False | Congenital smallness | Inferred relationship | Some |  | 
| Congenital microhepatia | Associated morphology | True | Congenital smallness | Inferred relationship | Some | 1 | 
| Congenital microcheilia | Associated morphology | False | Congenital smallness | Inferred relationship | Some | 1 |