I-123 MIBG IMAGING OF METASTATIC CARCINOID-TUMOR FROM THE RECTUM

I-131 MIBG, a specific radiopharmaceutical agent for scintigraphic ima ging and treatment of pheochromocytoma and neuroblastoma may be useful for detection of apudomas. Scintigraphy with I-123 radiolabeled MIBG was performed in a patient with metastatic carcinoid tumor from the re ctum. I-123 MIBG scintigraphic findings showed multiple areas of abnor mal tumor uptake of hepatic and bone metastases from the rectal carcin oid. Bone scintigraphy demonstrated multiple metastatic lesions. Compu ted tomography revealed multiple solid tumors of the liver. This repor t describes accumulation of I-123 MIBG in the liver and bone metastase s from the rectal carcinoid. Radioiodine MIBG scintigraphy may be usef ul for detecting metastatic lesions, for evaluating postoperative recu rrence, and also for the treatment of the carcinoid tumor.