Understanding the Link Between Endometriosis and Ovarian Cancer

By: Stephanie Delgado, MD, OB-GYN

Endometriosis is a gynecological condition where tissue grows outside of the uterus, leading to pain, inflammation, and, in some cases, infertility. Researchers are investigating the potential link between endometriosis and ovarian cancer, raising important questions about whether women with endometriosis are at increased risk for developing the disease.

Endometriosis and Its Complications

Endometriosis symptoms include pelvic pain, painful periods, and pain during intercourse. The condition’s severity can vary from mild to severe, with the disease occasionally spreading to other organs. The exact cause of endometriosis remains unclear, but theories suggest a combination of genetic, immunological, and hormonal factors.

The Evidence: Studies and Findings

Studies have explored the relationship between endometriosis and ovarian cancer, with varying results. For example, a study conducted by the Ovarian Cancer Association Consortium found that women with a history of endometriosis had a higher risk of developing ovarian cancer, specifically the endometrioid and clear cell subtypes. However, the study noted that the overall risk of ovarian cancer in women with endometriosis remained relatively low.

What Causes Increased Risk?

One prominent theory surrounding the increased risk of ovarian cancer in endometriosis patients involves chronic inflammation. Endometriosis causes constant swelling in the pelvic region, which can lead to DNA damage and mutations over time. The inflammation may help to transform endometriotic cells into cancerous ones.

Hormonal factors also play a big role. Estrogen, a hormone that promotes the growth of endometrial tissue, is known to stimulate both endometriotic and ovarian cells. Lengthy exposure to high levels of estrogen can increase the likelihood of cells becoming cancerous. Genetic factors are another important consideration. Research has identified several genetic mutations associated with both endometriosis and ovarian cancer, suggesting a shared genetic tendency.

Balancing the Risks

While the evidence points to an increased risk of specific types of ovarian cancer in women with endometriosis, it’s important to put this risk into perspective. Ovarian cancer remains relatively rare, and the risk for any woman with endometriosis is still low. Most women with the condition won’t develop ovarian cancer. Endometriosis patients should focus on regular monitoring and early detection. Frequent pelvic exams, imaging studies, or even the use of biomarkers to monitor for potential cancer are all ways to keep track of this disease.

Also, women with endometriosis should know the symptoms of ovarian cancer, such as persistent bloating, pelvic pain, and changes in bowel or bladder habits, to help with early diagnosis and treatment, if needed.

The connection between endometriosis and ovarian cancer is complex. Awareness is key to managing the risk well. By staying informed and proactive, endometriosis patients can take steps to protect their health and well-being.