Status: current, Not sufficiently defined by necessary conditions definition status. Date: 31-Jan 2002. Module: SNOMED CT core module
Descriptions:
| Id | Description | Lang | Type | Status | Case? | Module | 
| 19550019 | Circle of Willis | en | Synonym | Active | Only initial character case insensitive | SNOMED CT core module | 
| 19551015 | Circle of Willis, NOS | en | Synonym | Inactive | Only initial character case insensitive | SNOMED CT core module | 
| 376715014 | Structure of circle of Willis | en | Synonym | Active | Only initial character case insensitive | SNOMED CT core module | 
| 643634013 | Structure of circle of Willis (body structure) | en | Fully specified name | Active | Only initial character case insensitive | SNOMED CT core module | 
| 3717732018 | Circulus arteriosus cerebri | en | Synonym | Active | Entire term case insensitive | SNOMED CT core module | 
| Outbound Relationships | Type | Target | Active | Characteristic | Refinability | Group | Values | 
| Structure of circle of Willis | Is a | Arterial system structure | false | Inferred relationship | Existential restriction modifier | ||
| Structure of circle of Willis | Part of | Entire thorax | false | Additional relationship | Existential restriction modifier | ||
| Structure of circle of Willis | Part of | Entire cerebrovascular system | false | Additional relationship | Existential restriction modifier | ||
| Structure of circle of Willis | Part of | Entire arterial system | false | Additional relationship | Existential restriction modifier | ||
| Structure of circle of Willis | Is a | Structure of branch of posterior cerebral artery | false | Inferred relationship | Existential restriction modifier | ||
| Structure of circle of Willis | Is a | Structure of branch of middle cerebral artery | false | Inferred relationship | Existential restriction modifier | ||
| Structure of circle of Willis | Is a | Structure of intracranial artery | true | Inferred relationship | Existential restriction modifier | 
This concept is not in any reference sets