Unusual Bone Superscan, MIBG Superscan, and Ga-68 DOTATATE PET/CT in Metastatic Pheochromocytoma

摘要

A 17-year-old adolescent boy with biochemically raised 2-hour urinary metanephrine and normetanephrine as well as CT findings of retroperitoneal soft tissue mass and bony metastases was referred for further assessment. Apart from Ga-68 DOTATATE PET/CT evaluation, pretargeted systemic radionuclide therapy assessment with I-131-MIBG scintigraphy showed unusual phenomenon of MIBG superscan. Postsurgically, restaging Tc-99m-MDP bone scintigraphy showed typical bone superscan features. The MIBG superscan was better delineated on post-I-131-MIBG therapy images.