Surgery Incidental adrenal masses: A May be seen in as many as 10% of abdominal CT studies. B Most commonly represent pheochromocytoma; adrenocoical adenoma, adrenocoical carcinoma, and metastases from other primary cancers occur less frequently. C May represent adrenocoical carcinoma if greater than 6 cm. in diameter. D Should be routinely evaluated by measurement of 24-hour urine levels of catecholamines and their metabolites, coisol, and aldosterone plus fine-needle aspiration. 💡 Explanation Incidental adrenal masses: ✓ Correct Answer: C. May represent adrenocoical carcinoma if greater than 6 cm. in diameter.