Predicting Malignancy in Adnexal Tumors With FAPI PET/CT and FDG PET/CT: A Case Report on a Borderline Ovarian Tumor.

Umachanger, Janani Kantharooban; Zacho, Helle Damgaard; Sylvest, Camilla; Frandsen, Anna Poulsgaard; Bentestuen, Morten · Clin Nucl Med · 2025

case_report · Level V

Where this comes from

Abstract

A 54-year-old woman presented with a 55 × 64-mm tumor in the ovary with high [ 18 F]FDG uptake on [ 18 F]FDG PET/CT highly suggestive of ovarian cancer. Prior to surgery, the patient underwent [ 68 Ga]-Ga- fibroblast activation protein inhibitor (FAPI)-46 PET/CT, which revealed low [ 68 Ga]-Ga-FAPI-46 tumor uptake. Histopathology revealed a borderline ovarian tumor, which has low malignant potential and a 10-year survival rate greater than 93%. High [ 18 F]FDG uptake is considered a fair predictor of malignancy in adnexal tumors. The present case demonstrates the potential superiority of [ 68 Ga]-Ga-FAPI-46 PET/CT over [ 18 F]-FDG PET/CT in differentiating malignant adnexal tumors from borderline ovarian tumors.

Medical subject headings