Malignant intra-mesosalpinx extra-ovarian sex-cord like tumor: a case report

Uterine sex cord-like tumor (USCLTs) is a type of very rare cancer. It’s originally divided into two subtypes: type I and type II, and it is very similar with real sex cord tumor. A 47-year-old Chinese woman; 7 years after total hysterectomy, pelvic masses had been found for 6 years. Transabdominal bilateral adnexa resection, greater omentum resection and pelvic lymph node dissection were performed simultaneously. In the follow up visit, no trend of tumor recurrence showed, according to all previous gynecologic examinations. Eleven months later, abdominal radical right hemicolectomy was performed because of ‘stool characters have changed for several years’. Immunohistochemical staining and hematoxylin and eosin (H&E) staining were performed for pathological study. This type of tumor is not a result of primary ovarian sex cord stromal tumor’s metastasizing inside the mesosalpinx, neither Wolffian adnexal tumor, but an extra-ovarian sex-cord like stromal tumor that generated in mesosalpinx, which is reported here for the first time.