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Schizophrenia is a serious and surprisingly common brain disease -- worldwide, more people suffer from schizophrenia than from type 1 diabetes, Alzheimer's disease, or multiple sclerosis. Each person's experience is unique, but most schizophrenics suffer distorted thinking, hallucinations, and a reduced ability to feel normal emotions. Such symptoms usually can be controlled with medical treatment, but at present there is no known cause or cure.

MEDICAL REVIEW: Reviewed by Charlotte Grayson, MD, May 2004

SOURCE DOCUMENTATION: The Merck Manual, 17th edition.

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