system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
A 65-year-old Caucasian woman comes to the clinic with complaints of fatigability and persistent headaches for the last month. Her headache is dull, encompassing her whole head, and has been getting worse lately. She has associated diplopia and progressively diminishing peripheral vision. She also complains of difficulty losing weight despite trying to control her diet and exercising regularly. She weighs 91 kg (200 lb) at present and reports having gained 9 kg (20 lb) in the past month. Past medical history is insignificant. Blood pressure is 110/70 mm Hg, pulse rate is 60/min, respiratory rate is 12/min, temperature is 36.5°C (97.7°F). Physical examination shows bilateral papilledema. There is some pedal edema and her deep tendon reflexes are slow. CT scan shows suprasellar calcifications. Laboratory studies show:
Na+ 140 mEq/L
K+ 3.8 mEq/L
Serum calcium 9.5 mg/dL
TSH 0.05 U/mL
Free T4 0.2 ng/mL
Which of the following is the most probable diagnosis?
assistant
Craniopharyngioma