<unk>  <unk>  is a persistent unilateral headache that responds to indomethacin. It is usually unremitting, but rare cases of remission have been documented.<unk>  is considered a primary headache disorder, meaning that it is not caused by another condition.
Hemicrania continua
Arachnoid cyst
Meningohydroencephalocoele
Periventricular leukomalacia
Hydrocephalus
Subdural hygroma
Intraventricular hemorrhage
Cerebrospinal fluid leak