Whole-body FDG PET/CT in diagnosis of internal mammary nodal metastasis of ovarian carcinosarcoma.

Internal mammary lymph node is rare metastatic site in ovarian neoplasm. In this study, we report an ovarian carcinosarcoma with peritoneal carcinomatosis initially. Annually, whole-body FDG PET/CT is indicated during 4 years. Tiny peritoneal nodules are found on the first-time FDG PET/CT imaging. A high grade of FDG-avid internal mammary nodal activity is shown on the secondary time of FDG PET/CT imaging. Pathologic result of excision biopsy demonstrates carcinoma metastasis. On the recent imaging, significant FDG-avid peritoneal and subphrenic carcinomatosis has happened again. After surgery and chemotherapy, the patient is still followed up in clinic.