Adrenal insufficiency Quiz: Ace Your Exams

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A 62-year-old male is evaluated post-operatively after a transsphenoidal pituitary tumor resection two days ago. He appears groggy and is unable to provide any clinical history. Past medical history is notable for Cushing disease, for which he underwent resection of the aforementioned pituitary tumor. The surgery was uncomplicated, and he is not on any medications. Temperature is 37.0°C (98.6°F), pulse is 101/min, respirations are 14/min, blood pressure is 110/60mmHg, and oxygen saturation is 97% on room air. Physical examination is notable for truncal obesity and striae. Initial laboratory findings are demonstrated below:

A table lists serum chemistry results: Sodium 137 mEq/L, Potassium 4.3 mEq/L, Chloride 99 mEq/L, Bicarbonate 22 mEq/L, Creatinine 1.2 mg/dL, Glucose 36 mg/dL.

Which of the following laboratory findings is most representative of this patient’s clinical presentation?

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