An interesting case of thirst and polyuria

Answers on p 251. A 24 year old woman presented with a three week history of weight loss, thirst, polyuria, sweating, and nausea. For three days before admission she had abdominal pains and vomiting after meals. Past medical history included acromegaly treated by trans-sphenoidal resection of a pituitary macroadenoma at the age of 19 years. Postoperatively, she did not have diabetes insipidus; however, she developed anterior hypopituitarism replaced with hydrocortisone 10 mg twice daily, thyroxine 100 μg daily, and ethinyloestradiol and desogestrel for three weeks …