schizophrenia undifferentiated schizophrenia At the DSM-5, the DSM-IV subtypes of schizophrenia (i.e., paranoid, disorganized, catatonic, undifferentiated, and residual types) are eliminated due to their limited diagnostic stability, low reliability, and poor validity. These subtypes also have not been shown to exhibit distinctive patterns of treatment response or longitudinal course. (Highlights of Changes from DSM-IV-TR to DSM-5, American Psychiatric Publishing) This form of schizophrenia is diagnosed when the person’s behaviour shows prominent psychotic symptoms that do not meet the criteria for the paranoid, disorganized or catatonic categories. These symptoms may include thought disturbances, delusions, hallucinations, incoherence, and severely impaired behaviour. Some time undifferentiated schizophrenia turns out to be an early stage of another subtype. "Understanding abnormal behavior". David Sue, Derald Wing Sue, Stanley Sue. F20.3x 295.90 esquizofrenia tipo indiferenciado