Emergence of Koro After Abrupt Cessation of Olanzapine

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Sir: Koro is a Malay term meaning “head of a turtle.” First reported by Dutch physicians working in western Sulawesi, the condition has also been observed among ethnic Chinese, where it has been known as suoyang (suo: retract; yang: penis). Koro has been described as the intense fear that one’s genitals are shrinking into the body and may recede into the abdomen, possibly causing death.

J Clin Psychiatry 1998;59(2):86-87