Imaging of medullary thyroid carcinoma and hyperfunctioning adrenal medulla using iodine-131 metaiodobenzylguanidine.

Scintigraphy with radiolabeled metaiodobenzylguanidine was performed in a patient with MEN Type IIa having a pheochromocytoma of the right adrenal gland, adrenomedullary hyperplasia of the left adrenal gland and a primary medullary thyroid carcinoma. The scintigraphic findings demonstrate visualization of all the above mentioned pathologies.