Atypical Anorexia Nervosa
Atypical anorexia nervosa is defined in the Diagnostic and Statistical Manual of Mental Disorders (Fifth Edition) as a disorder that shares the same diagnostic criteria as anorexia nervosa (AN), including dysmorphic body image, intense fear of weight gain, and restriction of energy intake, with the exception that patients with atypical AN present at a weight that is at or above the normal range despite a significant weight loss. Patients with atypical AN share many of the same medical and psychological complications and comorbidities as those with AN but with some differences in the way they are manifested. Treatment for these patients includes medical, nutritional, and psychological aspects of care, but choosing the appropriate goal weight and understanding the expected prognosis for these patients remain areas of research and discussion.