| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Sacralisation of fifth lumbar vertebra | Associated morphology | False | Congenital abnormal fusion | Inferred relationship | Some | 5 | 
| Lumbarised first sacral vertebra | Associated morphology | False | Congenital abnormal fusion | Inferred relationship | Some | 4 | 
| Congenital partial fusion of spine with hemivertebra - balanced | Associated morphology | False | Congenital abnormal fusion | Inferred relationship | Some | 4 | 
| Complex tarsal coalition | Associated morphology | False | Congenital abnormal fusion | Inferred relationship | Some | 4 | 
| Congenital fusion of ribs | Associated morphology | False | Congenital abnormal fusion | Inferred relationship | Some | 3 | 
| Sacralisation of fifth lumbar vertebra | Associated morphology | False | Congenital abnormal fusion | Inferred relationship | Some | 6 | 
| Imperfect fusion of skull | Associated morphology | True | Congenital abnormal fusion | Inferred relationship | Some | 1 | 
| Horseshoe kidney | Associated morphology | False | Congenital abnormal fusion | Inferred relationship | Some | 3 | 
| Assimilation pelvis | Associated morphology | True | Congenital abnormal fusion | Inferred relationship | Some | 1 | 
| Splenogonadal fusion | Associated morphology | True | Congenital abnormal fusion | Inferred relationship | Some | 2 | 
| Pygopagus | Associated morphology | False | Congenital abnormal fusion | Inferred relationship | Some | 3 | 
| Omphalopagus | Associated morphology | False | Congenital abnormal fusion | Inferred relationship | Some | 3 | 
| Lumbarised first sacral vertebra | Associated morphology | False | Congenital abnormal fusion | Inferred relationship | Some | 1 | 
| Congenital fusion of pulmonary valve segment | Associated morphology | True | Congenital abnormal fusion | Inferred relationship | Some | 1 | 
| Simple syndactyly of toes | Associated morphology | True | Congenital abnormal fusion | Inferred relationship | Some | 1 | 
| Osseous syndactyly lesser toes | Associated morphology | False | Congenital abnormal fusion | Inferred relationship | Some | 2 | 
| Lunate-triquetrum synostosis | Associated morphology | True | Congenital abnormal fusion | Inferred relationship | Some | 2 | 
| Capitate-hamate synostosis | Associated morphology | True | Congenital abnormal fusion | Inferred relationship | Some | 2 | 
| Scaphoid-lunate synostosis | Associated morphology | True | Congenital abnormal fusion | Inferred relationship | Some | 2 | 
| Humeroulnar synostosis | Associated morphology | True | Congenital abnormal fusion | Inferred relationship | Some | 2 | 
| Congenital synostosis of lower limb bones | Associated morphology | True | Congenital abnormal fusion | Inferred relationship | Some | 1 | 
| Congenital complete fusion of spine | Associated morphology | False | Congenital abnormal fusion | Inferred relationship | Some | 2 | 
| Commissural fusion of pulmonary valve | Associated morphology | True | Congenital abnormal fusion | Inferred relationship | Some | 1 | 
| Commissural fusion of aortic valve | Associated morphology | True | Congenital abnormal fusion | Inferred relationship | Some | 1 | 
| Acrosyndactyly of the fingers | Associated morphology | True | Congenital abnormal fusion | Inferred relationship | Some | 1 | 
| Carpal synostosis | Associated morphology | False | Congenital abnormal fusion | Inferred relationship | Some | 1 | 
| Brachysyndactyly of thumb | Associated morphology | True | Congenital abnormal fusion | Inferred relationship | Some | 2 | 
| Osseous syndactyly of toes second to fourth web | Associated morphology | False | Congenital abnormal fusion | Inferred relationship | Some | 2 | 
| Syndactyly of thumb | Associated morphology | True | Congenital abnormal fusion | Inferred relationship | Some | 1 | 
| Congenital fusion of labia | Associated morphology | True | Congenital abnormal fusion | Inferred relationship | Some | 1 | 
| Supernumerary fused sternebra | Associated morphology | True | Congenital abnormal fusion | Inferred relationship | Some | 2 | 
| Coloboma of choroid | Associated morphology | False | Congenital abnormal fusion | Inferred relationship | Some | 7 | 
| Cake kidney | Associated morphology | False | Congenital abnormal fusion | Inferred relationship | Some | 3 | 
| Craniopagus parietalis | Associated morphology | False | Congenital abnormal fusion | Inferred relationship | Some | 4 | 
| Craniopagus | Associated morphology | False | Congenital abnormal fusion | Inferred relationship | Some | 4 | 
| Craniopagus occipitalis | Associated morphology | False | Congenital abnormal fusion | Inferred relationship | Some | 4 | 
| Craniopagus frontalis | Associated morphology | False | Congenital abnormal fusion | Inferred relationship | Some | 4 | 
| Craniopagus parasiticus | Associated morphology | False | Congenital abnormal fusion | Inferred relationship | Some | 4 | 
| Splenogonadal fusion | Associated morphology | False | Congenital abnormal fusion | Inferred relationship | Some | 3 | 
| Fundus coloboma | Associated morphology | False | Congenital abnormal fusion | Inferred relationship | Some | 4 | 
| Syndactyly of fingers type 8 | Associated morphology | True | Congenital abnormal fusion | Inferred relationship | Some | 1 | 
| Mirror hands and feet co-occurrent with nasal defect | Associated morphology | False | Congenital abnormal fusion | Inferred relationship | Some | 2 | 
| Syndactyly type 1 | Associated morphology | True | Congenital abnormal fusion | Inferred relationship | Some | 1 | 
| Syndactyly type 3 | Associated morphology | True | Congenital abnormal fusion | Inferred relationship | Some | 1 | 
| Syndactyly type 2 | Associated morphology | True | Congenital abnormal fusion | Inferred relationship | Some | 2 | 
| Microcephaly with cervical spine fusion anomaly | Associated morphology | False | Congenital abnormal fusion | Inferred relationship | Some | 3 | 
| Syndactyly type 4 | Associated morphology | True | Congenital abnormal fusion | Inferred relationship | Some | 1 | 
| Syndactyly type 5 | Associated morphology | True | Congenital abnormal fusion | Inferred relationship | Some | 1 | 
| Radioulnar synostosis with microcephaly and scoliosis syndrome | Associated morphology | False | Congenital abnormal fusion | Inferred relationship | Some | 5 | 
| Progressive non-infectious anterior vertebral fusion | Associated morphology | False | Congenital abnormal fusion | Inferred relationship | Some | 3 | 
| Cleft palate with stapes fixation and oligodontia syndrome | Associated morphology | False | Congenital abnormal fusion | Inferred relationship | Some | 4 | 
| Triphalangeal thumb and polysyndactyly syndrome | Associated morphology | True | Congenital abnormal fusion | Inferred relationship | Some | 2 | 
| Acropectoral syndrome | Associated morphology | False | Congenital abnormal fusion | Inferred relationship | Some | 2 | 
| Brachydactyly with syndactyly Zhao type | Associated morphology | False | Congenital abnormal fusion | Inferred relationship | Some | 3 | 
| Cenani Lenz syndrome | Associated morphology | True | Congenital abnormal fusion | Inferred relationship | Some | 1 | 
| Aphalangy and syndactyly with microcephaly syndrome | Associated morphology | False | Congenital abnormal fusion | Inferred relationship | Some | 4 | 
| Brachydactyly with syndactyly Zhao type | Associated morphology | True | Congenital abnormal fusion | Inferred relationship | Some | 2 | 
| Craniosynostosis Philadelphia type | Associated morphology | False | Congenital abnormal fusion | Inferred relationship | Some | 4 | 
| Curry Jones syndrome | Associated morphology | False | Congenital abnormal fusion | Inferred relationship | Some | 6 | 
| Craniosynostosis, hydrocephalus, Arnold-Chiari malformation type I, radioulnar synostosis syndrome | Associated morphology | False | Congenital abnormal fusion | Inferred relationship | Some | 8 | 
| Filippi syndrome | Associated morphology | False | Congenital abnormal fusion | Inferred relationship | Some | 6 | 
| Craniofrontonasal dysplasia with Poland anomaly syndrome | Associated morphology | False | Congenital abnormal fusion | Inferred relationship | Some | 5 | 
| Cloverleaf skull with multiple congenital anomalies syndrome | Associated morphology | False | Congenital abnormal fusion | Inferred relationship | Some | 8 | 
| Cloverleaf skull with multiple congenital anomalies syndrome | Associated morphology | False | Congenital abnormal fusion | Inferred relationship | Some | 9 | 
| Filippi syndrome | Associated morphology | True | Congenital abnormal fusion | Inferred relationship | Some | 4 | 
| Cloverleaf skull with multiple congenital anomalies syndrome | Associated morphology | False | Congenital abnormal fusion | Inferred relationship | Some | 7 | 
| Schilbach Rott syndrome | Associated morphology | False | Congenital abnormal fusion | Inferred relationship | Some | 3 | 
| Radioulnar synostosis with developmental delay and hypotonia syndrome | Associated morphology | True | Congenital abnormal fusion | Inferred relationship | Some | 3 | 
| Blepharophimosis, ptosis, esotropia, syndactyly, short stature syndrome | Associated morphology | False | Congenital abnormal fusion | Inferred relationship | Some | 5 | 
| Radioulnar synostosis with amegakaryocytic thrombocytopenia syndrome | Associated morphology | False | Congenital abnormal fusion | Inferred relationship | Some | 5 | 
| Bilateral congenital chorioretinal coloboma of eyes | Associated morphology | False | Congenital abnormal fusion | Inferred relationship | Some | 4 | 
| Faciocardiorenal syndrome | Associated morphology | False | Congenital abnormal fusion | Inferred relationship | Some | 5 | 
| Syndactyly, telecanthus, anogenital and renal malformation syndrome | Associated morphology | False | Congenital abnormal fusion | Inferred relationship | Some | 7 | 
| Saethre-Chotzen syndrome | Associated morphology | False | Congenital abnormal fusion | Inferred relationship | Some | 1 | 
| Hypotrichosis and intellectual disability syndrome Lopes type | Associated morphology | False | Congenital abnormal fusion | Inferred relationship | Some | 3 | 
| Syndactyly, telecanthus, anogenital and renal malformation syndrome | Associated morphology | True | Congenital abnormal fusion | Inferred relationship | Some | 4 | 
| Acardiacus anceps | Associated morphology | False | Congenital abnormal fusion | Inferred relationship | Some | 1 | 
| Cryptodidymus | Associated morphology | False | Congenital abnormal fusion | Inferred relationship | Some | 2 | 
| Parasitic twin of asymmetrical conjoined twins | Associated morphology | True | Congenital abnormal fusion | Inferred relationship | Some | 2 | 
| Acardius | Associated morphology | False | Congenital abnormal fusion | Inferred relationship | Some | 1 | 
| Gastrothoracopagus dipygus | Associated morphology | False | Congenital abnormal fusion | Inferred relationship | Some | 3 | 
| Sirenomelus | Associated morphology | False | Congenital abnormal fusion | Inferred relationship | Some | 3 | 
| Mesoaxial synostotic syndactyly with phalangeal reduction syndrome | Associated morphology | True | Congenital abnormal fusion | Inferred relationship | Some | 1 | 
| Thoracodidymus | Associated morphology | False | Congenital abnormal fusion | Inferred relationship | Some | 3 | 
| Monocephalus tripus dibrachius | Associated morphology | False | Congenital abnormal fusion | Inferred relationship | Some | 3 | 
| Syncephalus | Associated morphology | False | Congenital abnormal fusion | Inferred relationship | Some | 3 | 
| Katadidymus | Associated morphology | False | Congenital abnormal fusion | Inferred relationship | Some | 3 | 
| Heterodymus | Associated morphology | False | Congenital abnormal fusion | Inferred relationship | Some | 3 | 
| Cephalothoracopagus | Associated morphology | False | Congenital abnormal fusion | Inferred relationship | Some | 3 | 
| Deradelphus | Associated morphology | False | Congenital abnormal fusion | Inferred relationship | Some | 3 | 
| Monocephalus | Associated morphology | False | Congenital abnormal fusion | Inferred relationship | Some | 3 | 
| Cryptodidymus | Associated morphology | False | Congenital abnormal fusion | Inferred relationship | Some | 3 | 
| Parasitic twin of asymmetrical conjoined twins | Associated morphology | False | Congenital abnormal fusion | Inferred relationship | Some | 3 | 
| Anakatadidymus | Associated morphology | False | Congenital abnormal fusion | Inferred relationship | Some | 3 | 
| Omphaloangiopagus | Associated morphology | False | Congenital abnormal fusion | Inferred relationship | Some | 3 | 
| Pygomelus | Associated morphology | False | Congenital abnormal fusion | Inferred relationship | Some | 3 | 
| Gastrothoracopagus | Associated morphology | False | Congenital abnormal fusion | Inferred relationship | Some | 3 | 
| Monocephalus tetrapus dibrachius | Associated morphology | False | Congenital abnormal fusion | Inferred relationship | Some | 3 | 
| Thoracoparacephalus | Associated morphology | False | Congenital abnormal fusion | Inferred relationship | Some | 3 | 
| Pygodidymus | Associated morphology | False | Congenital abnormal fusion | Inferred relationship | Some | 3 | 
| Autositic twin of asymmetrical conjoined twins | Associated morphology | False | Congenital abnormal fusion | Inferred relationship | Some | 3 |