Table 1.

ICSD-3 criteria for Kleine–Levin Syndrome.

A  ≥2 recurrent episodes of hypersomnia, each persisting for 2 days to 5 weeks B  Episodes recur at least 1 every 18 months C  There is normal sleep, cognition, behavior, and mood between episodes In addition, the patient should have at least one of the following: (1)Hyperphagia (2)Hypersexuality (3)Abnormal behavior such as irritability, aggression (4)Cognitive dysfunction such as confusion, derealisation, hallucinations