68 Ga-DOTA-FAPI-46 PET/CT Imaging for Restaging in a Patient With Metastatic Pheochromocytoma : Comparison With 68 Ga-DOTA-TATE PET/CT.

Pheochromocytomas (PHEOs) are neural crest-derived tumors originating from the chromaffin cells of the adrenal medulla and were recognized as one of the subtypes of paragangliomas by the World Health Organization in 2022. 68 Ga-labeled somatostatin analog ( 68 Ga-DOTA-NOC, 68 Ga-DOTA-TOC, and 68 Ga-DOTA-TATE) PET imaging has shown significant performance compared with 123 MIBG scintigraphy in the diagnosis of paragangliomas. It is now known that fibroblast activation protein (FAP) is overexpressed by various cancer-associated fibroblasts, including PHEOs. We would like to present the findings of 68 Ga-DOTA-FAPI-46 PET/CT and 68 Ga-DOTA-TATE PET/CT imaging performed for restaging on a 42-year-old man diagnosed with metastatic PHEO.