| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Fetal macrocephaly | Finding site | False | Entire head | Inferred relationship | Existential restriction modifier | 2 | 
| Fetal macrocephaly | Finding site | True | Entire head | Inferred relationship | Existential restriction modifier | 1 | 
| Bannayan syndrome | Finding site | False | Entire head | Inferred relationship | Existential restriction modifier | 1 | 
| Macrocephaly | Finding site | False | Entire head | Inferred relationship | Existential restriction modifier | 1 | 
| Relative macrocephaly | Finding site | False | Entire head | Inferred relationship | Existential restriction modifier | 1 | 
| Macrocephaly with spastic paraplegia and dysmorphism syndrome | Finding site | False | Entire head | Inferred relationship | Existential restriction modifier | 4 | 
| Osteoporosis and macrocephaly with blindness and joint hypermobility syndrome | Finding site | False | Entire head | Inferred relationship | Existential restriction modifier | 3 | 
| X-linked intellectual disability Atkin type | Finding site | False | Entire head | Inferred relationship | Existential restriction modifier | 1 | 
| X-linked recessive intellectual disability and macrocephaly with ciliary dysfunction syndrome | Finding site | False | Entire head | Inferred relationship | Existential restriction modifier | 1 | 
| X-linked intellectual disability, macrocephaly, macroorchidism syndrome | Finding site | False | Entire head | Inferred relationship | Existential restriction modifier | 1 | 
| Decapitation | Finding site | False | Entire head | Inferred relationship | Existential restriction modifier | 2 | 
| Overgrowth, macrocephaly, facial dysmorphism syndrome | Finding site | False | Entire head | Inferred relationship | Existential restriction modifier | 3 | 
| Overgrowth, macrocephaly, facial dysmorphism syndrome | Finding site | False | Entire head | Inferred relationship | Existential restriction modifier | 2 | 
| Macrocephaly, short stature, paraplegia syndrome | Finding site | False | Entire head | Inferred relationship | Existential restriction modifier | 8 | 
| Acephaly | Finding site | True | Entire head | Inferred relationship | Existential restriction modifier | 1 | 
| Macrocephaly, obesity, mental disability, ocular abnormality syndrome | Finding site | False | Entire head | Inferred relationship | Existential restriction modifier | 3 | 
| Facial dysmorphism, macrocephaly, myopia, Dandy-Walker malformation syndrome | Finding site | False | Entire head | Inferred relationship | Existential restriction modifier | 11 | 
| Macrocephaly and developmental delay syndrome | Finding site | False | Entire head | Inferred relationship | Existential restriction modifier | 2 | 
| Malan overgrowth syndrome | Finding site | False | Entire head | Inferred relationship | Existential restriction modifier | 1 | 
| Macrocephaly and developmental delay syndrome | Finding site | False | Entire head | Inferred relationship | Existential restriction modifier | 1 | 
| Pectus excavatum, macrocephaly, dysplastic nails syndrome | Finding site | False | Entire head | Inferred relationship | Existential restriction modifier | 3 | 
| Pectus excavatum, macrocephaly, dysplastic nails syndrome | Finding site | False | Entire head | Inferred relationship | Existential restriction modifier | 2 | 
| Intellectual disability, seizures, macrocephaly, obesity syndrome | Finding site | False | Entire head | Inferred relationship | Existential restriction modifier | 1 | 
| Macrocephaly, obesity, mental disability, ocular abnormality syndrome | Finding site | False | Entire head | Inferred relationship | Existential restriction modifier | 2 | 
| Macrocephaly with spastic paraplegia and dysmorphism syndrome | Finding site | False | Entire head | Inferred relationship | Existential restriction modifier | 2 | 
| Facial dysmorphism, macrocephaly, myopia, Dandy-Walker malformation syndrome | Finding site | False | Entire head | Inferred relationship | Existential restriction modifier | 1 | 
| Macrocephaly, short stature, paraplegia syndrome | Finding site | False | Entire head | Inferred relationship | Existential restriction modifier | 2 | 
| Osteoporosis and macrocephaly with blindness and joint hypermobility syndrome | Finding site | False | Entire head | Inferred relationship | Existential restriction modifier | 1 | 
| Acephalothorax | Finding site | False | Entire head | Inferred relationship | Existential restriction modifier | 1 | 
| Macrocephaly, intellectual disability, autism syndrome | Finding site | False | Entire head | Inferred relationship | Existential restriction modifier | 1 | 
| Decapitation | Finding site | True | Entire head | Inferred relationship | Existential restriction modifier | 1 | 
| [SO]Head region NEC | Is a | False | Entire head | Inferred relationship | Existential restriction modifier |  | 
| [SO]Nasal sinus NEC | Part of | False | Entire head | Additional relationship | Existential restriction modifier |  | 
| [SO]Specified nose NEC | Part of | False | Entire head | Additional relationship | Existential restriction modifier |  | 
| [SO]Specified part of ear NEC | Part of | False | Entire head | Additional relationship | Existential restriction modifier |  | 
| [SO]Specified nasal sinus NEC | Part of | False | Entire head | Additional relationship | Existential restriction modifier |  | 
| [SO]Face region NEC | Part of | False | Entire head | Additional relationship | Existential restriction modifier |  | 
| Head region NEC | Is a | False | Entire head | Inferred relationship | Existential restriction modifier |  |