68Ga-DOTA-FAPI-04 Uptake of Accessory Breast in a Patient With Breast Cancer

68Ga-DOTA-FAPI-04 is a promising PET agent for tumor imaging. However, some nonneoplastic lesions can also show increased FAPI uptake. Herein, we presented a case of a patient with left breast cancer who showed a right accessory breast with increased tracer uptake on 68Ga-DOTA-FAPI-04 PET/CT. Final histopathology confirmed there were no malignant components in the accessory breast.