A 35-year-old previously healthy woman was given a 10-day course of erythromycin for a nonproductive cough, diffuse interstitial infiltrates, and a presumptive di- agnosis of mycoplasma pneumonia. She now has a well- demarcated rash on her fingers (Plate M). She also has fever and severe erosions on the buccal mucous mem- branes. The most likely diagnosis is 

A 70-year-old woman with a history of diabetes, hypertension, and recurrent urinary tract infections is ad- mitted with fever and pyuria. Her urine output is poor. Antibiotics and dopamine are administered; the dopamine dose is progressively titrated from 3 ’g/kg to 30 ’g/kg. The patient complains of chest discomfort. An electro- cardiogram discloses changes compatible with ischemia in the anterior precordial leads. What is the likely cause for these electrocardiographic changes? 

A patient who is being screened for vitamin B12 de- ficiency undergoes a Schilling test, 1 mg of cobalamin administered intramuscularly 1 h after the administration of radiolabeled cobalamin. A normal Schilling test, ex- cretion of 10% of the labeled cobalamin in a 24-h urine specimen, would be most likely in which of the following situations? 

A 23-year-old woman presents for a routine physical examination. The patient gives a history of trying to diet, but she also admits to binge intake and extensive use of laxatives. The physical examination discloses a woman of normal height and weight and is unremarkable except for chipping and erosion of the front teeth. This patient is likely to 

Which of the following personality traits is most likely to describe a young woman with anorexia nervosa?