Mental Disorders due to a General Medical Condition

This category includes conditions whose cause is a diagnosable mental problem. There must be evidence for the medical condition, the disturbance must not be better accounted for by another mental disorder, and the problem must not occur only when the person is delirious. Examples of medical conditions that may cause mental problems are head trauma, some metabolic imbalances, and encephalitis. DSM-IV lists three subtypes of this category (see below). 

Catatonic Disorder
Personality Change
Mental Disorder not otherwise specified