| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Cloverleaf skull with multiple congenital anomalies syndrome | Associated morphology | False | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 6 | 
| Cloverleaf skull with multiple congenital anomalies syndrome | Associated morphology | False | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 10 | 
| Hunter McAlpine craniosynostosis syndrome | Associated morphology | False | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 2 | 
| Lowry MacLean syndrome | Associated morphology | False | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 7 | 
| Agammaglobulinemia, microcephaly, craniosynostosis, severe dermatitis syndrome | Associated morphology | False | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 7 | 
| Obesity, colitis, hypothyroidism, cardiac hypertrophy, developmental delay syndrome | Associated morphology | False | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 6 | 
| Scaphycephaly | Associated morphology | False | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 3 | 
| Familial scaphocephaly syndrome McGillivray type | Associated morphology | False | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 3 | 
| Craniomicromelic syndrome | Associated morphology | False | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 5 | 
| Craniosynostosis fibular aplasia syndrome | Associated morphology | False | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 2 | 
| Trigonocephaly, short stature, developmental delay syndrome | Associated morphology | False | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 2 | 
| Acrocephalopolysyndactyly type IV | Associated morphology | False | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 3 | 
| Summitt syndrome | Associated morphology | False | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 3 | 
| Skeletal abnormality, cutis laxa, craniostenosis, ambiguous genitalia, retardation, facial abnormality syndrome | Associated morphology | False | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 6 | 
| Solitary median maxillary central incisor syndrome | Associated morphology | True | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 3 | 
| Craniosynostosis Herrmann Opitz type | Associated morphology | True | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 1 | 
| Familial lambdoid synostosis | Associated morphology | False | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 2 | 
| Hunter McAlpine craniosynostosis syndrome | Associated morphology | True | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 1 | 
| Cardiocranial syndrome Pfeiffer type | Associated morphology | True | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 1 | 
| Shprintzen Goldberg craniosynostosis syndrome | Associated morphology | True | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 1 | 
| Summitt syndrome | Associated morphology | True | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 1 | 
| Saethre-Chotzen syndrome | Associated morphology | True | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 1 | 
| Crouzon syndrome | Associated morphology | True | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 2 | 
| Pseudoaminopterin syndrome | Associated morphology | True | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 3 | 
| Craniosynostosis fibular aplasia syndrome | Associated morphology | True | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 1 | 
| Holoprosencephaly craniosynostosis syndrome | Associated morphology | True | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 1 | 
| Acrocephalosyndactyly type I | Associated morphology | True | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 1 | 
| Crouzon syndrome with acanthosis nigricans | Associated morphology | True | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 3 | 
| Craniosynostosis and intracranial calcification syndrome | Associated morphology | True | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 2 | 
| Closed ductus venosus | Associated morphology | True | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 1 | 
| Vomero-premaxillary faciosynostosis | Associated morphology | True | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 1 | 
| Spondyloepiphyseal dysplasia, craniosynostosis, cleft palate, cataract and intellectual disability syndrome | Associated morphology | True | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 4 | 
| Agammaglobulinemia, microcephaly, craniosynostosis, severe dermatitis syndrome | Associated morphology | True | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 3 | 
| Baller-Gerold syndrome | Associated morphology | True | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 2 | 
| Craniomicromelic syndrome | Associated morphology | True | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 1 | 
| Complete perimaxillary faciosynostosis | Associated morphology | True | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 1 | 
| Trigonocephaly C syndrome | Associated morphology | True | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 1 | 
| Trigonocephaly, short stature, developmental delay syndrome | Associated morphology | True | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 1 | 
| Trigonocephaly with bifid nose and acral anomaly syndrome | Associated morphology | True | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 2 | 
| Acrocephalopolysyndactyly type IV | Associated morphology | True | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 2 | 
| Obesity, colitis, hypothyroidism, cardiac hypertrophy, developmental delay syndrome | Associated morphology | True | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 2 | 
| Craniofrontonasal dysplasia with Poland anomaly syndrome | Associated morphology | True | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 1 | 
| Trigonocephaly with broad thumb syndrome | Associated morphology | True | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 2 | 
| Familial scaphocephaly syndrome McGillivray type | Associated morphology | True | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 1 | 
| Craniosynostosis with Dandy-Walker malformation and hydrocephalus syndrome | Associated morphology | True | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 1 | 
| Craniosynostosis with facial dysmorphism and brachydactyly syndrome | Associated morphology | False | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 2 | 
| Capra DeMarco syndrome | Associated morphology | True | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 4 | 
| Craniosynostosis Boston type | Associated morphology | True | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 3 | 
| Jackson-Weiss syndrome | Associated morphology | True | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 2 | 
| Skeletal abnormality, cutis laxa, craniostenosis, ambiguous genitalia, retardation, facial abnormality syndrome | Associated morphology | True | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 4 | 
| Lowry MacLean syndrome | Associated morphology | True | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 2 | 
| Craniosynostosis and dental anomalies syndrome | Associated morphology | True | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 2 | 
| Lethal occipital encephalocele, skeletal dysplasia syndrome | Associated morphology | True | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 2 | 
| Fibroblast growth factor receptor 2-related bent bone dysplasia | Associated morphology | True | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 2 | 
| Cloverleaf skull, asphyxiating thoracic dysplasia syndrome | Associated morphology | False | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 5 | 
| Craniorhiny | Associated morphology | True | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 3 | 
| Muenke syndrome | Associated morphology | True | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 1 | 
| Posterior perimaxillary faciosynostosis | Associated morphology | True | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 1 | 
| Dolichocephalic dwarfism | Associated morphology | True | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 1 | 
| Long narrow head | Associated morphology | True | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 1 | 
| Antley-Bixler syndrome | Associated morphology | True | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 1 | 
| Antley-Bixler syndrome | Associated morphology | True | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 3 | 
| Parieto-occipital craniosynostosis | Associated morphology | True | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 1 | 
| Familial lambdoid synostosis | Associated morphology | False | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 1 | 
| Spheno-fronto-parietal craniofaciosynostosis | Associated morphology | True | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 1 | 
| Spheno-fronto-parietal craniofaciosynostosis | Associated morphology | True | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 2 | 
| Fronto-malar faciosynostosis | Associated morphology | True | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 1 | 
| Cloverleaf skull with multiple congenital anomalies syndrome | Associated morphology | True | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 1 | 
| Cloverleaf skull with multiple congenital anomalies syndrome | Associated morphology | True | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 4 | 
| Cloverleaf skull with multiple congenital anomalies syndrome | Associated morphology | True | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 5 | 
| Cloverleaf skull syndrome | Associated morphology | True | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 1 | 
| Cloverleaf skull syndrome | Associated morphology | True | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 3 | 
| Cloverleaf skull, asphyxiating thoracic dysplasia syndrome | Associated morphology | True | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 2 | 
| Cloverleaf skull, asphyxiating thoracic dysplasia syndrome | Associated morphology | True | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 3 | 
| Cloverleaf skull, asphyxiating thoracic dysplasia syndrome | Associated morphology | True | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 4 | 
| Pfeiffer syndrome type 1 | Associated morphology | True | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 2 | 
| Pfeiffer syndrome type 2 | Associated morphology | True | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 2 | 
| Pfeiffer syndrome type 3 | Associated morphology | True | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 2 | 
| Metopic ridging, ptosis, facial dysmorphism syndrome | Associated morphology | True | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 2 | 
| Non-syndromic metopic craniosynostosis | Associated morphology | True | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 2 | 
| Mid-facial hypoplasia | Associated morphology | True | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 1 | 
| Muenke syndrome | Associated morphology | False | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 1 | 
| Lambdoid synostosis | Associated morphology | True | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 1 | 
| Pansynostosis | Associated morphology | True | Congenital premature fusion | Inferred relationship | Existential restriction modifier | 1 |