Breast Metastasis of Primary Peritoneal Carcinoma Demonstrated on FDG PET/CT

Primary serous peritoneal carcinomas (PSPCs) are rare, and dissemination other than intraperitoneal implantation is even rarer. Breast is an extremely unusual location of metastasis for PSPC. The distinction of breast metastasis of PSPC from primary breast cancer is crucial because the treatment and the prognosis are entirely different. Here we present a case of breast and axillary lymph node metastases from PSPC that were identified on staging FGD PET/CT.