Case ReportsSuccessful ECT in a Case of Leonhard's Cycloid PsychosisLittle, John D. F.R.A.N.Z.C.P*; Ungvari, Gabor S. M.D., Ph.D†; McFarlane, Joanne R.N* Author Information *Grampians Psychiatric Services, Ballarat, Victoria, Australia; and †Department of Psychiatry, Chinese University of Hong Kong, Hong Kong, China Received June 8, 1998; accepted January 13, 1999. Address correspondence and reprint requests to Dr. J. D. Little, Grampians Psychiatric Services, P.O. Box 577, Ballarat, Victoria, 3353 Australia. The Journal of ECT 16(1):p 62-67, March 2000. Buy Abstract In Leonhard's nosological system, acute, episodic psychoses with good short-term and long-term prognoses, characterized by mixed affective and schizophrenic features, confusion, and alternating psychomotor retardation and excitement are called cycloid psychoses. According to clinical lore, patients with cycloid psychoses show an excellent and prompt response to electroconvulsive therapy (ECT). We describe a patient with typical motility psychosis, a subtype of cycloid psychoses, who failed to respond to a combination of antipsychotic and benzodiazepine medication but quickly recovered after the administration of ECT. © 2000 Lippincott Williams & Wilkins, Inc.