Status: current, Sufficiently defined by necessary conditions definition status (core metadata concept). Date: 31-Jul 2005. Module: SNOMED CT core
Descriptions:
| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group |
| Congenital stenosis of aqueduct of Sylvius | Is a | True | Aqueduct of Sylvius anomaly | Inferred relationship | Some | |
| Hydrocephalus with anomaly of aqueduct of Sylvius | Is a | True | Aqueduct of Sylvius anomaly | Inferred relationship | Some | |
| Aqueduct of Sylvius anomaly NOS | Is a | False | Aqueduct of Sylvius anomaly | Inferred relationship | Some | |
| Congenital obstruction of aqueduct of Sylvius | Is a | True | Aqueduct of Sylvius anomaly | Inferred relationship | Some | |
| Atresia of aqueduct of Sylvius NEC | Is a | False | Aqueduct of Sylvius anomaly | Inferred relationship | Some | |
| Aqueduct of Sylvius septum NEC | Is a | False | Aqueduct of Sylvius anomaly | Inferred relationship | Some | |
| Hydrocephalus with anomaly of aqueduct of Sylvius | Due to | True | Aqueduct of Sylvius anomaly | Inferred relationship | Some | 2 |
| Atresia of aqueduct of Sylvius | Is a | True | Aqueduct of Sylvius anomaly | Inferred relationship | Some |
This concept is not in any reference sets