Definitions for kleine-levin syndrome

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  1. Kleine-Levin Syndrome

    A rare condition characterized by recurrent hypersomnias associated with hyperphagia, occurring primarily in males in the second to third decade of life. Clinical features include mental confusion, excessive sleep requirements (approximately 18 hours per day), restlessness, and in some cases hallucinations. Episodes have a duration of days to weeks, and may recur several times per year. This condition may resolve spontaneously over several years. (From Adams, et al., Principles of Neurology, 6th ed, p569)

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  1. Kleine–Levin syndrome

    Kleine-Levin syndrome also known as "Sleeping Beauty syndrome" is a rare sleep disorder characterized by persistent episodic hypersomnia and cognitive or mood changes. Many patients also experience hyperphagia, hypersexuality and other symptoms. Patients generally experience recurrent episodes of the condition for more than a decade. Individual episodes generally last more than a week but less than a month. The condition greatly affects the personal, professional, and social lives of sufferers, but symptoms spontaneously resolve and seldom cause permanent issues. The severity of symptoms and the course of the disease vary between sufferers. Patients commonly have about 20 episodes over about a decade. Several months generally elapse between episodes. The onset of the condition usually follows a viral infection; several different viruses have been observed to trigger KLS. It is generally only diagnosed after similar conditions have been excluded; MRI, CT scans, lumbar puncture, and toxicology tests are used to rule out other possibilities. The disease's mechanism is not known, but the thalamus is thought to possibly play a role.

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