In DSM-III, this category is called Atypical Somatoform Disorder
This is a residual category to be used when the predominant disturbance is the presentation of physical symptoms or complaints not explainable on the basis of demonstrable organic findings or a known pathophysiological mechanism and apparently linked to psychological factors.
An example of cases that can be classified here include those of individuals who are preoccupied with some imagined defect in physical appearance that is out of proportion to any actual physical abnormality that may exist. This syndrome has sometimes been termed "Dysmorphophobia."
In DSM-IV, this category is called Somatoform Disorder Not Otherwise Specified
This category includes disorders with somatoform symptoms that do not meet the criteria for any specific Somatoform Disorder. Examples include
- Pseudocyesis: a false belief of being pregnant that is associated with objective signs of pregnancy, which may include abdominal enlargement (although the umbilicus does not become everted), reduced menstrual flow, amenorrhea, subjective sensation of fetal movement, nausea, breast engorgement and secretions, and labor pains at the expected date of delivery. Endocrine changes may be present, but the syndrome cannot be explained by a general medical condition that causes endocrine changes (e.g., a hormone-secreting tumor).
- A disorder involving nonpsychotic hypochondriacal symptoms of less than 6 months; duration.
- A disorder involving unexplained physical complaints (e.g., fatigue or body weakness) of less than 5 months' duration that are not due to another mental disorder.
This category applies to presentations in which symptoms characteristic of a somatic symptom and related disorder that cause clinically significant distress or impairment in social, occupational, or other important areas of functioning predominate but do not meet the full criteria for any of the disorders in the somatic symptom and related disorders diagnostic class. The unspecified somatic symptom and related disorder category should not be used unless there are decidedly unusual situations where there is insufficient information to make a more specific diagnosis.