The authors describe the Kline-Levin Syndrome (KLS) and point out the difficulties regarding its diagnosis. A clinical case of a 16-year-old boy diagnosed and followed by the authors is presented. Although having the classic trilogy (hypersomnolence; hyperphagia; hypersexuality), this is an illustrative case of such difficulties under several distinct clinical forms. Causes and consequences raised by diagnostic difficulties are discussed, with special attention to aspects concerning differential diagnosis.
Kleine-Levin syndrome; hypersomnolence; hyperphagia; hypersexuality; clinical case; differential diagnosis
