This document provides an overview of schizophrenia, including its definition, types, symptoms, diagnosis, and treatment. Schizophrenia is a syndrome characterized by major disturbances in behavior, affect, and thought. There are several types of schizophrenia, including paranoid, disorganized, catatonic, undifferentiated, and residual. Symptoms can be positive, such as hallucinations and delusions, or negative, like blunted affect and apathy. Diagnosis involves examination of symptoms and medical history, while treatment includes antipsychotic medication, electroconvulsive therapy, psychotherapy, and social support.