A. Schizophrenia. Hallucinations and formal thought disorder are not seen in personality disorders. Patients with schizoid personality disorder may have good work histories, whereas schizophrenic patients usually have poor work histories.
B. Schizotypal Personality Disorder. Eccentricities and oddities of perception, behavior and speech are not seen in schizoid personality disorder.
C. Avoidant Personality Disorder. Social isolation is subjectively unpleasant (ego-dystonic) for avoidant patients. Unlike schizoid patients, avoidant patients are hypersensitive to the thoughts and feelings of others.
D. Paranoid Personality Disorder. Although they are also frequently emotionally constricted, paranoid patients are able to express strong emotion when they feel persecuted.
E. Personality Change Due to a General Medical Condition and Substance-Related Disorder. Acute symptoms are temporally related to a medication, drugs or a medical condition. The longstanding patterns of behavior required for a personality disorder are not present.
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