Status: current, Sufficiently defined by necessary conditions definition status (core metadata concept). Date: 31-Jan 2002. Module: SNOMED CT core
Descriptions:
| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Congenital absence of exoccipital bone | Is a | True | Congenital anomaly of exoccipital bone | Inferred relationship | Some | |
| Congenital abnormal fusion of exoccipital bone | Is a | True | Congenital anomaly of exoccipital bone | Inferred relationship | Some | |
| Congenital abnormal shape of exoccipital bone | Is a | True | Congenital anomaly of exoccipital bone | Inferred relationship | Some | |
| Congenital fenestration of exoccipital bone | Is a | True | Congenital anomaly of exoccipital bone | Inferred relationship | Some | |
| Congenital hypoplasia of exoccipital bone | Is a | True | Congenital anomaly of exoccipital bone | Inferred relationship | Some | |
| Incomplete ossification of exoccipital bone | Is a | True | Congenital anomaly of exoccipital bone | Inferred relationship | Some | |
| Lack of ossification of exoccipital bone | Is a | True | Congenital anomaly of exoccipital bone | Inferred relationship | Some | 
This concept is not in any reference sets