| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| X-linked Dandy-Walker malformation with intellectual disability, basal ganglia disease and seizure syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 4 | 
| Dandy-Walker syndrome with spina bifida | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Macrocephaly, short stature, paraplegia syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 4 | 
| Spinal muscular atrophy, Dandy-Walker malformation, cataract syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 3 | 
| Congenital pontocerebellar hypoplasia type 9 | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 2 | 
| Congenital pontocerebellar hypoplasia type 9 | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Foveal hypoplasia with presenile cataract syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Pancreatic hypoplasia, diabetes mellitus, congenital heart disease syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 2 | 
| [EDTA] Congenital renal hypoplasia - type unspecified associated with renal failure | Associated morphology | False | Hypoplasia | Inferred relationship | Some | 1 | 
| Leydig cell agenesis | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Ventricular imbalance with dominant left ventricle and hypoplastic right ventricle | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Ventricular imbalance with dominant right ventricle and hypoplastic left ventricle | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Achondrogenesis, type IA | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Congenital hypoganglionosis of large intestine | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Congenital hypoganglionosis of large intestine | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 2 | 
| Acrorenal mandibular syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 2 | 
| Hypotrichosis, osteolysis, periodontitis, palmoplantar keratoderma syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 3 | 
| Haspeslagh Fryns Muelenaere syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Myelatelia | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Hypotrichosis and intellectual disability syndrome Lopes type | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Oculoauriculovertebral spectrum with radial defects | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Incomplete development of membranous labyrinth | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Metaphyseal dysplasia, maxillary hypoplasia, brachydactyly syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Hypoplastic tricuspid papillary muscle | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Hypoplasia of eye | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Rudimentary tracheal bronchus | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Congenital hypoplasia of finger | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Achondrogenesis | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 2 | 
| Hirschsprung disease with nail hypoplasia and dysmorphism | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 3 | 
| Hypoplasia of right atrioventricular valve annulus in double inlet ventricle | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Achondrogenesis, type II | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Hypoplastic mitral papillary muscle | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Short stature, onychodysplasia, facial dysmorphism, hypotrichosis syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 4 | 
| Camptomelic dysplasia | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 4 | 
| Neonatal sclerosing cholangitis, ichthyosis, hypotrichosis syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 2 | 
| Severe achondrolasia with developmental delay and acanthosis nigricans | Associated morphology | False | Hypoplasia | Inferred relationship | Some | 3 | 
| Achondroplasia | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 2 | 
| Hypoplasia of left atrioventricular valve annulus in double inlet ventricle | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Hyposmia, nasal and ocular hypoplasia, hypogonadotropic hypogonadism syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Hyposmia, nasal and ocular hypoplasia, hypogonadotropic hypogonadism syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 4 | 
| Stimmler syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 2 | 
| Hypotrichosis with juvenile macular degeneration syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 3 | 
| Achondrogenesis, type IB | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Hypoplasia of left ventricular inflow tract | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Severe intellectual disability, epilepsy, anal anomaly, distal phalangeal hypoplasia syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Foveal hypoplasia, optic nerve decussation defect, anterior segment dysgenesis syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 3 | 
| Congenital pontocerebellar hypoplasia type 10 | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Congenital pontocerebellar hypoplasia type 10 | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 2 | 
| Congenital muscular dystrophy with cerebellar involvement | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 2 | 
| Cortical dysgenesis with pontocerebellar hypoplasia due to TUBB3 mutation | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 2 | 
| Lissencephaly co-occurrent with congenital cerebellar hypoplasia type E | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Lissencephaly co-occurrent with congenital cerebellar hypoplasia type A | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Severe achondrolasia with developmental delay and acanthosis nigricans | Associated morphology | False | Hypoplasia | Inferred relationship | Some | 5 | 
| Thoracomelic dysplasia | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 2 | 
| Intellectual disability, coarse face, macrocephaly, cerebellar hypotrophy syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 2 | 
| Hypoplastic chondrodystrophy | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 3 | 
| Cortical dysgenesis with pontocerebellar hypoplasia due to TUBB3 mutation | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 3 | 
| White matter hypoplasia, corpus callosum agenesis, intellectual disability syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 3 | 
| Familial adrenal hypoplasia with absent pituitary luteinising hormone | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Undergrowth of whole hand | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Right hypoplastic heart syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Marie Unna syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Intellectual disability, congenital heart disease, blepharophimosis, blepharoptosis and hypoplastic teeth | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Asymmetric crying face association | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Fryns syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 5 | 
| Fryns syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 4 | 
| Septo-optic dysplasia sequence | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Short-limb skeletal dysplasia with severe combined immunodeficiency | Associated morphology | False | Hypoplasia | Inferred relationship | Some | 2 | 
| MASA syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 2 | 
| Deficient mural leaflet of left ventricular component of common atrioventricular valve | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Hypoplasia of cranial sinus | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Congenital hypoplasia of annulus fibrosus of aorta | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Severe achondroplasia, developmental delay, acanthosis nigricans syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 4 | 
| Bilateral primary congenital hypoplasia of lung | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Bilateral primary congenital hypoplasia of lung | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 2 | 
| Leydig cell hypoplasia due to complete luteinising hormone receptor inactivation | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Leydig cell hypoplasia due to partial luteinising hormone receptor inactivation | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Hypoplasia of optic nerve due to central nervous system malformation | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Optic nerve hypoplasia due to endocrine deficiency | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Hypoplasia of right coronoid process of mandible | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Hypoplasia of left coronoid process of mandible | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Hypoplasia of right condyloid process of mandible | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Hypoplasia of left condyloid process of mandible | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Oculo-auriculo-vertebral spectrum | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 2 | 
| Bilateral secondary hypoplasia of lung | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Bilateral secondary hypoplasia of lung | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 2 | 
| X-linked complicated corpus callosum dysgenesis | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 2 | 
| Bilateral coronoid hypoplasia of mandible | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 2 | 
| Bilateral condylar hypoplasia of mandible | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 2 | 
| Microcephalus, brain defect, spasticity, hypernatraemia syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 2 | 
| Endosteal hyperostoses with cerebellar hypoplasia | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 6 | 
| Aase syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Left acquired malar hypoplasia | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Right acquired malar hypoplasia | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Bilateral acquired malar hypoplasia | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Bilateral acquired malar hypoplasia | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 2 | 
| Congenital cerebellar ataxia due to RNU12 mutation | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Repair of hypoplastic aortic arch | Direct morphology | True | Hypoplasia | Inferred relationship | Some | 859816706 | 
| Familial steroid-resistant nephrotic syndrome with adrenal insufficiency | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 1 | 
| Short stature, brachydactyly, obesity, global developmental delay syndrome | Associated morphology | True | Hypoplasia | Inferred relationship | Some | 3 | 
| MIRAGE syndrome | Associated morphology | False | Hypoplasia | Inferred relationship | Some | 539252 |