Which imaging modality is commonly used to localize pheochromocytoma after biochemical confirmation?

Which imaging modality is commonly used to localize pheochromocytoma after biochemical confirmation?

• A. Chest X-ray
• B. Brain MRI
• C. Ultrasound of the abdomen
• D. Abdominal CT or MRI

Answer: (D)

After biochemical confirmation, the goal is to locate the tumor, which most commonly sits in the adrenal glands. The imaging test routinely used to localize pheochromocytoma is a contrast-enhanced study of the abdomen—either CT or MRI of the adrenals. CT is fast, widely available, and excellent for identifying adrenal masses and detailing their size and relation to surrounding vessels. MRI provides superb soft-tissue contrast and is preferred when avoiding radiation is important or when characterizing complex lesions. Together, they help determine laterality, size, and operability, which are essential for planning adrenalectomy. Other options like chest X-ray or brain MRI aren’t used to locate the adrenal tumor, and ultrasound of the abdomen, while useful in some settings, is less sensitive and operator-dependent compared with CT or MRI.

After biochemical confirmation, the goal is to locate the tumor, which most commonly sits in the adrenal glands. The imaging test routinely used to localize pheochromocytoma is a contrast-enhanced study of the abdomen—either CT or MRI of the adrenals.

CT is fast, widely available, and excellent for identifying adrenal masses and detailing their size and relation to surrounding vessels. MRI provides superb soft-tissue contrast and is preferred when avoiding radiation is important or when characterizing complex lesions. Together, they help determine laterality, size, and operability, which are essential for planning adrenalectomy.

Other options like chest X-ray or brain MRI aren’t used to locate the adrenal tumor, and ultrasound of the abdomen, while useful in some settings, is less sensitive and operator-dependent compared with CT or MRI.