Status: current, Sufficiently defined by necessary conditions definition status (core metadata concept). Date: 31-Jul 2004. Module: SNOMED CT core
Descriptions:
| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group |
| No history of migraine | est un(e) (attribut) | True | No headache | Inferred relationship | Some | |
| Pinna non-tender (situation) | est un(e) (attribut) | False | No headache | Inferred relationship | Some | |
| No tenderness in ear canal (situation) | est un(e) (attribut) | False | No headache | Inferred relationship | Some | |
| Larynx non-tender (situation) | est un(e) (attribut) | False | No headache | Inferred relationship | Some | |
| O/E - ear not painful | est un(e) (attribut) | False | No headache | Inferred relationship | Some | |
| No earache | est un(e) (attribut) | False | No headache | Inferred relationship | Some |
This concept is not in any reference sets