Transformed migraine.
Chronic tension-type headache, which is included in the International Headache Classification, is present in only a minority of patients who present with chronic daily headache. The majority have what is termed transformed migraine, with a history of distinct episodes of migraine in the initial years which progresses into chronic daily headache. These patients with transformed migraine exhibit mixed features of migraine and chronic tension-type headache. Two distinct types of transformed migraine are identifiable, namely those related to excessive intake of medications (drug-induced transformed migraine) and those unrelated to excessive use of medications. The clinical features of transformed migraine and the drug-induced variety are described. The need for revision of the International Classification to include chronic daily headache and the subtypes of transformed migraine is pointed out.
Mathew
N T
NT
Houston Headache Clinic, TX 77004.
D000328:Adult; D000700:Analgesics / Q000009:adverse effects; D004878:Ergotamine / Q000009:adverse effects; D005260:Female; D006261:Headache / Q000139:chemically induced; D006801:Humans; D008950:MMPI; D008297:Male; D008881:Migraine Disorders / Q000145:classification / Q000503:physiopathology* / Q000523:psychology; D012890:Sleep; D013375:Substance Withdrawal Syndrome
D000700:Analgesics; D004878:Ergotamine