Evaluation of an adrenal mass in a patient with progressive prostate cancer reveals pheochromocytoma.

Adrenal masses in cancer patients pose diagnostic problems. We report the case of a 59 years old male with a history of prostate cancer who presented to us with serially rising prostate specific antigen. On imaging studies he had bone lesions and in addition had a 1.7 cm left adrenal mass. Since metastasis to the adrenal gland has rarely been reported in prostate cancer, and since the radiological criteria in our case favored malignancy, we proceeded with hormonal evaluation and fine needle aspiration biopsy of the adrenal mass which proved it to be pheochromocytoma. This was followed by an uneventful adrenalectomy.