preliminary clinical studies with 131i-meta-iodobenzylguanidine , a newly synthesized radiopharmaceutical and guanethidine analog capable of imaging the adrenal medulla , have led to the identification of a case of disseminated malignant pheochromocytoma with the localization of brain and bone metastases .
C0001629
adrenal medulla
C0334419
malignant pheochromocytoma