Ovarian Cancer: Many Diseases Under One Name.

In the United States, ovarian cancer is the second most common form of gynecologic cancer and the second leading cause of gynecologic cancer death. It is a heterogeneous disease with many different types and subtypes. The most common variety (70%-80%) is the high-grade serous epithelial tumor. A positive family history and/or the presence of susceptibility genes (BRCA1, BRCA2, and mismatch repair genes) increase the risk for developing the disease. Due to the lack of effective screening tools, even in those with known increased risk, most ovarian cancers are diagnosed at advanced stages. Diagnosis and accurate staging usually require tissue sampling and extensive debulking surgery performed by a surgeon who specializes in gynecologic oncology. Combination chemotherapy, before or after surgery, or as primary treatment for advanced disease is commonly needed. Mortality rates vary by stage, grade, and type of tumor. For the most common histotypes, due to the presence of advanced disease at presentation in most individuals, overall death rates remain high. Survival is better with some of the less common subtypes including sex cord stromal, germ cell and borderline epithelial ovarian tumors.