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Figure 17a. Adrenal pheochromocytomas in MEN 2. (a) US image obtained in a patient with MEN 2A demonstrates a heterogeneous right-sided suprarenal mass, a finding that is consistent with a pheochromocytoma. (b) Contrast-enhanced CT scan obtained in a patient with MEN 2B shows bilateral, partially cystic adrenal masses. At surgery, the masses were confirmed to represent pheochromocytomas. Pheochromocytomas in MEN patients are much more likely to be bilateral (50% of cases) compared with sporadic, nonsyndromal pheochromocytoma (bilateral tumors in 10% of cases).
