Kleine-Levin Syndrome Accompanied With Complex Headache:Report of One Case.

Kleine-Levin syndrome is an extremely rare sleep disorder.In addition to recurrent daytime sleepiness,symptoms such as overeating,hypersexuality,cognitive impairment,and mental and behavioral abnormalities usually occur.Hypothalamic dysfunction may be the underlying pathogenesis.Cases with headache are rare.We reported a case of Kleine-Levin syndrome with headache symptoms during narcolepsy,and his headache was characterized by both migraine and cluster headache.It is hypothesized that Kleine-Levin syndrome may have a potential common pathogenesis with functional headaches such as migraine or cluster headache,which may be related to hypothalamic dysfunction.