Snapshot A 16-year-old girl is brought to the pediatrician by her parents, who are concerned that their daughter has been refusing to eat dinner at home and has been appearing more "frail" than usual. The patient admits that she has been "terrified" of gaining more weight and feels that she is too fat. She is enrolled in several advanced classes at school and feels significant stress from her participation in the ballet club, as she is preparing to audition for a lead role. Upon further questioning, the patient reports that she has not had a menstrual period in 3 months. Introduction Overview login to view 1 more bullet Epidemiology login to view 11 more bullets Pathophysiology login to view 1 more bullet Prognosis login to view 3 more bullets Presentation Symptoms login to view 10 more bullets Physical exam login to view 8 more bullets Studies Serum labs login to view 4 more bullets EKG login to view 2 more bullets Differential Hyperthyroidism login to view 2 more bullets Celiac disease login to view 2 more bullets Treatment Lifestyle login to view 8 more bullets Medical login to view 7 more bullets Complications Malnutrition Delayed puberty Amenorrhea Arrested growth Osteoporosis Electrolyte imbalances Cardiovascular effects login to view 3 more bullets