title: [Mitochondrial disorder underlying headache symptoms].
abstract: MERRF (myoclonic epilepsy with ragged red fibers) is a rare mitochondrial disorder affecting the function of several distinct organs. Diagnosis of the syndrome has conventionally been made on the basis of the patient's myoclonic epilepsy and the so-called ragged red fibers observed in the patient's muscle biopsy. The diagnosis is confirmed by mutation analysis. Symptoms and findings vary from patient to patient even within one family. A strain-associated headache episode and bout of nausea with deficiency symptoms occurs as the most severe symptom in the young boy of our case report.
authors.affiliation: TYKS:n lastenklinikka, perinnöllisyyspoliklinikka, PL 52, 20521 Turku.
authors.forename: Hannele
authors.initials: H
authors.lastname: Koillinen
authors.forename: Satu
authors.initials: S
authors.lastname: Jääskeläinen
authors.forename: Kari
authors.initials: K
authors.lastname: Koski