obsolete_headache disorder true true headache disorder COHD:375527 Various conditions with the symptom of headache. Headache disorders are classified into major groups, such as primary headache disorders (based on characteristics of their headache symptoms) and secondary headache disorders (based on their etiologies). (International Classification of Headache Disorders, 2nd ed. Cephalalgia 2004: suppl 1) http://purl.obolibrary.org/obo/MONDO_0021146 ICD10:G44 MONDO:0021146 SCTID:230461009 Replaced by Mondo term MONDO_0021146, with which this term was previously merged. Use: http://purl.obolibrary.org/obo/MONDO_0021146 3.88.0 MESH:D020773