Tubo-ovarian high-grade serous carcinomas commonly express CA19.9

Tubo-ovarian high-grade serous carcinoma (HGSC) is one of the leading causes of cancer death in women worldwide and frequently presents at advanced stage (1). Many cases are unresectable at diagnosis due to extensive disease affecting multiple sites and in such cases when a disseminated tubo-ovarian HGSC is suspected, a percutaneous core biopsy is often undertaken prior to neoadjuvant chemotherapy being administered (2).