A 49-year-old man was noted to have a 4.7-cm right adrenal mass on two-dimensional source CT images from a virtual colonoscopy. A history was obtained of a few years of hypertension, fatigue and heat intolerance. Serum metanephrine and normetanephrine levels were 5 and 10 times normal levels respectively and 24-hour urine catecholamines were similarly elevated. Serum aldosterone was normal as were thyroid function and imaging studies.