Medical Definition of Psychosis, schizophrenia

  • Medical Author:
    William C. Shiel Jr., MD, FACP, FACR

    Dr. Shiel received a Bachelor of Science degree with honors from the University of Notre Dame. There he was involved in research in radiation biology and received the Huisking Scholarship. After graduating from St. Louis University School of Medicine, he completed his Internal Medicine residency and Rheumatology fellowship at the University of California, Irvine. He is board-certified in Internal Medicine and Rheumatology.

Psychosis, schizophrenia: The most chronic and disabling of the major mental illnesses. Schizophrenia may be one disorder, or it may be many disorders, with different causes. Because of the disorder's complexity, few generalizations hold true for all people who are diagnosed as schizophrenic.

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Last Editorial Review: 1/24/2017

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