| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Generalised enamel hypoplasia associated with fluorosis | Associated morphology | False | Hypoplasia | Inferred relationship | Some | 1 | 
| Parietal foramina with clavicular hypoplasia | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 2 | 
| Pontocerebellar hypoplasia type 4 | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Agnathia, holoprosencephaly, situs inversus syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Pontocerebellar hypoplasia type 3 | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Bilateral renal hypoplasia | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Congenital cerebellar hypoplasia co-occurrent with tapetoretinal degeneration | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Lissencephaly with cerebellar hypoplasia type F | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Pontocerebellar hypoplasia type 1 | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Congenital transverse mandibular hypoplasia | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Lissencephaly with cerebellar hypoplasia type C | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Pontocerebellar hypoplasia type 8 | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Congenital micrognathism | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Congenital pontocerebellar hypoplasia | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Syndromic orbital border hypoplasia | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Lissencephaly with cerebellar hypoplasia type D | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| MORM syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Hypoplasia of corpus callosum | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Hypoplasia of right ventricular outflow tract and trabecular area | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Hypoplasia of right ventricular inflow tract | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Hypoplasia of right ventricular outflow tract | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Congenital vertical mandibular hypoplasia | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Testicular regression syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Pontocerebellar hypoplasia type 7 | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Pfeiffer Palm Teller syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Intellectual disability, hypoplastic corpus callosum, preauricular tag syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 2 | 
| Congenital pulmonary hypoplasia due to prolonged premature rupture of membranes | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Intrahepatic biliary hypoplasia | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Congenital pulmonary hypoplasia due to lung space occupying lesion | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Septo-optic dysplasia sequence | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 2 | 
| Saito Kuba Tsuruta syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Lissencephaly with cerebellar hypoplasia | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Lissencephaly with cerebellar hypoplasia type B | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Congenital hypoplasia of ulna and split foot syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 2 | 
| Pulmonary hypoplasia associated with short gestation | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Oligomeganephronic hypoplasia of kidney | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 2 | 
| Cerebro-costo-mandibular syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Congenital pontocerebellar hypoplasia type 2 | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Congenital hypoplasia of cardiac ventricle | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Pontocerebellar hypoplasia type 6 | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Congenital horizontal mandibular hypoplasia | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Diffuse hypoplasia of right ventricle | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Pontocerebellar hypoplasia type 5 | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Congenital hypoplasia of cerebrum | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Hypoplasia and coloboma of alar cartilage with telecanthus syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Saito Kuba Tsuruta syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 2 | 
| Distal limb deficiency with micrognathia syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Brachymorphism with onychodysplasia and dysphalangism syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 2 | 
| Amyotrophia congenita | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Agenesis of corpus callosum, intellectual disability, coloboma, micrognathia syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 3 | 
| Left renal agenesis co-occurrent with right renal hypoplasia | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 2 | 
| Splenogonadal fusion, limb defect, micrognathia syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Thickened earlobe with conductive deafness syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Diaphragmatic defect, limb deficiency, skull defect syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 3 | 
| Deafness, enamel hypoplasia, nail defect syndrome | Associated morphology | False | Hypoplasia | Inferred relationship | Some | 1 | 
| Limb mammary syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 2 | 
| Scimitar syndrome with additional anomalous pulmonary venous connection | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 3 | 
| Scimitar syndrome with additional anomalous pulmonary venous connection | Associated morphology | False | Hypoplasia | Inferred relationship | Some | 2 | 
| Scimitar syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 2 | 
| Scimitar syndrome | Associated morphology | False | Hypoplasia | Inferred relationship | Some | 3 | 
| Mandibular hypoplasia, deafness, progeroid syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Stabilisation of hypoplastic thumb | Direct morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Streak gonad | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Short ulna, dysmorphism, hypotonia, intellectual disability syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Hypohidrosis, enamel hypoplasia, palmoplantar keratoderma, intellectual disability syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 2 | 
| Partial corpus callosum agenesis, cerebellar vermis hypoplasia with posterior fossa cysts syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Short stature, pituitary and cerebellar defect and small sella turcica syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 2 | 
| Hypoplastic left heart syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Turner's tooth | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Vascular ring with malrotation and dextroversion of heart and hypoplasia of right lung and left arterial duct | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 2 | 
| Hypoplasia of left heart without intrinsic valve stenosis and without atresia | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Scalp, ear, nipple syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 4 | 
| Antley-Bixler syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 2 | 
| Congenital hypoplasia of eye bulge | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Hypotrichosis with keratosis pilaris and lentiginosis | Associated morphology | False | Hypoplasia | Inferred relationship | Some | 2 | 
| Hereditary hypotrichosis with recurrent skin vesicles syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Congenital hypotrichia | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Spondyloepimetaphyseal dysplasia, hypotrichosis syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Temple Baraitser syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 2 | 
| Temple Baraitser syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Hemifacial microsomia | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Mammary digital nail syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Non-eruption of teeth, maxillary hypoplasia, genu valgum syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 3 | 
| Microglossia | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Craniofacial microsomia | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Bilateral craniofacial microsomia | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Hypoplasia of uterus and cervix | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Congenital hypoplasia of ovary | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Congenital ichthyosis with hypotrichosis syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Hypoplasia of pancreas, intestinal atresia, hypoplasia of gallbladder syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 2 | 
| Hypoplasia of pancreas, intestinal atresia, hypoplasia of gallbladder syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 3 | 
| Streak ovary | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Joint contracture, webbed neck, micrognathia, hypoplastic nipple syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Joint contracture, webbed neck, micrognathia, hypoplastic nipple syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 2 | 
| Short stature, auditory canal atresia, mandibular hypoplasia, skeletal anomalies syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 3 | 
| Aase Smith type 1 syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 6 | 
| Craniosynostosis with Dandy-Walker malformation and hydrocephalus syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 5 | 
| Facial dysmorphism, macrocephaly, myopia, Dandy-Walker malformation syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 5 | 
| Dandy-Walker syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Dandy-Walker malformation with postaxial polydactyly syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 3 | 
| X-linked Dandy-Walker malformation with intellectual disability, basal ganglia disease and seizure syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 4 |