Psychosis has many causes. Psychiatrists typically receive a thorough training in its diagnosis, but the diagnosis of psychosis secondary to non-psychiatric conditions is often not emphasized. An understanding of the underlying cause is important so that effective management programs can be implemented. The Diagnosis of Psychosis bridges the gap between psychiatry and medicine, providing a comprehensive review of primary and secondary causes of psychosis. It covers both common and rare causes in a clinically focused guide. Useful for both teaching and reference, the text covers physical and mental state examination, describes key investigations, and summarises the non-psychiatric features of medical conditions causing psychosis. Particularly relevant for psychiatrists and trainees in psychiatry, this volume will also assist neurologists and general physicians who encounter psychosis in their practice.