Remarkable Improvement of Myocardial Metaiodobenzylguanidine Uptake After Surgery in a Patient with Pheochromocytoma

Abstract

A patient with pheochromocytoma showed remarkable improvement of myocardial metaiodobenzylguanidine (MIBG) uptake within a short time after surgical resection of the tumor. Myocardial MIBG findings in this case may contribute to an interpretation of the kinetics of MIBG in the human heart.

Diagnosis of pheochromocytoma in the setting of Parkinson disease

“…the decreased 123 i-miBG uptake in such cases could result from competition between increased levels of circu lating catecholamines and 123 i-miBG. 16 medications such as tricyclic anti depressants, specific calcium antagonists and labetalol can also interfere with uptake of 123 i-miBG. 17 if 123 i-miBG scanning is unavailable or produces negative results, Pet scanning with 18 F-fluorodopa, 18 F-fluorodopamine or 18 F-FDG can be used as an alternative.…”