Status: current, Not sufficiently defined by necessary conditions definition status (core metadata concept). Date: 31-Jan 2002. Module: SNOMED CT core
Descriptions:
| Outbound Relationships | Type | Target | Active | Characteristic | Refinability | Group | Values |
| Chronic cluster headache evolved from episodic cluster headache | Is a | Chronic cluster headache | true | Inferred relationship | Some | ||
| Chronic cluster headache evolved from episodic cluster headache | Finding site | Brain tissue structure | true | Inferred relationship | Some | 1 | |
| Chronic cluster headache evolved from episodic cluster headache | Has definitional manifestation | Pain | false | Inferred relationship | Some | ||
| Chronic cluster headache evolved from episodic cluster headache | Has definitional manifestation | Headache | false | Inferred relationship | Some | ||
| Chronic cluster headache evolved from episodic cluster headache | Clinical course | Chronic | true | Inferred relationship | Some | 2 | |
| Chronic cluster headache evolved from episodic cluster headache | Finding site | Structure of half of head lateral to midsagittal plane (body structure) | true | Inferred relationship | Some | 3 |
| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group |
This concept is not in any reference sets