PMC3420517_01
CT scan showing heterogeneous vascular right adrenal mass, suggestive of a pheochromocytoma.
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fig1
Computed tomography scan of the abdomen, performed to exclude renal abscess, showed a heterogeneous vascular right adrenal mass measuring 6.5 x 3.3 cm that enhanced with contrast, reported as being suggestive of pheochromocytoma (Figure 1). 24-hour urine catecholamine and metanephrine levels on the 5th day of admission were measured: urine adrenaline 28 nmol/day (NR 9.3-122), urine noradrenaline 396 nmol/day (NR 72-505), urine metanephrine 3411 nmol/day (NR 264-1729), urine normetanephrine 5141 nmol/day (NR 480-2424).
131I-MIBG scan showing increased uptake in the right suprarenal region, consistent with adrenal pheochromocytoma.
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fig2
A 131I-metaiodobenzylguanidine (MIBG) scan demonstrated an MIBG-avid mass in the right suprarenal region, consistent with pheochromocytoma (Figure 2), with no evidence of distant metastases. 24-hour urine-free cortisol and plasma renin and aldosterone were normal.