Eating disorder out prior to a diagnosis of an eating disorder or any other psychiatric disorder. In the past 30 years eating disorders have become increasingly conspicuous and it is uncertain whether the changes in presentation reflect a true increase. Anorexia nervosa and bulimia nervosa are the most clearly defined subgroups of a wider range of eating disorders. Many patients present with subthreshold expressions of the two main diagnoses: others with different patterns and symptoms. The diagnostic workup typically includes complete medical and psychosocial history and follows a rational and formulaic approach to the diagnosis. Neuroimaging using fMRI, MRI, PET and SPECT
Other specified feeding or eating disorder in the literature, as it was perceived to be uncommon compared to the other defined eating disorders. In "DSM-III-R", published in 1987, the Atypical Eating Disorder category became known as Eating Disorder Not Otherwise Specified (EDNOS). "DSM-III-R" included examples of individuals who would meet criteria for EDNOS, in part to acknowledge the increasingly recognized heterogeneity of individuals within the diagnostic category. In 1994, "DSM-IV" was published and expanded EDNOS to include six clinical presentations. These presentations included individuals who: A disadvantage of "DSM-IV"'s broad EDNOS category was that people with very different symptoms were still classified as having the same