Which are the causes of Ovarian cancer?

Ovarian cancer is a complex disease primarily caused by uncontrolled cell growth in the ovaries or fallopian tubes, often triggered by a combination of genetic predispositions and hormonal factors. While the exact cause remains under intense scientific study, researchers have identified specific genetic mutations and lifetime ovulation cycles as the most significant contributors to the development of ovarian cancer.

What causes ovarian cancer?

In medical terms, we distinguish between causes—the direct biological events that initiate the disease—and risk factors, which are circumstances that increase the likelihood of these events occurring. Ovarian cancer often begins with DNA damage in the epithelial cells of the ovaries or the fimbriae of the fallopian tubes. This damage causes cells to replicate uncontrollably, forming a tumor. While we understand the cellular mechanics, we are still researching the exact environmental and molecular "triggers" that initiate this process in any specific individual.

How do genetic factors influence ovarian cancer?

Approximately 10–15% of ovarian cancer cases are linked to inherited genetic mutations. The most well-known are the BRCA1 and BRCA2 genes, which normally help repair damaged DNA. When these genes are mutated, the body’s ability to fix cellular errors is compromised, significantly raising the risk of developing ovarian cancer. Other hereditary syndromes, such as Lynch syndrome (HNPCC), also play a documented role in increasing susceptibility.

What are the primary risk factors for ovarian cancer?

Beyond genetics, several factors influence the risk of developing ovarian cancer:

• Ovulatory cycles: The "incessant ovulation" theory suggests that frequent ovulation over a lifetime increases the risk of damage to the ovarian surface.


• Age: The risk of ovarian cancer increases significantly after menopause, with the median age of diagnosis being 63.


• Reproductive history: Factors that reduce the number of lifetime ovulations, such as pregnancy, breastfeeding, and the use of oral contraceptives, are associated with a lower risk.


• Endometriosis: A history of endometriosis is linked to an increased risk of specific subtypes of ovarian cancer.

What is the current state of research?

Medical researchers are currently focusing on the "tubal origin" theory, which suggests that many cases of ovarian cancer actually begin as small lesions in the fallopian tubes. By mapping these early cellular changes, scientists hope to improve early detection and prevention strategies for those at high risk.

Next steps

• Consult a gynecologic oncologist if you have a strong family history of breast or ovarian cancer.


• Speak with a genetic counselor to determine if genetic testing for BRCA or Lynch syndrome is appropriate for you.


• Connect with the 60 members of the DiseaseMaps.org community who are navigating their own experiences with ovarian cancer.

Medical disclaimer: This information is for educational purposes only and does not constitute medical advice, diagnosis, or treatment; always consult with a qualified healthcare provider regarding your health.

References

• NIH Genetic and Rare Diseases Information Center (GARD): Ovarian Cancer overview.


• National Cancer Institute (NCI): Ovarian, Fallopian Tube, and Primary Peritoneal Cancer Prevention.


• American Cancer Society: What Causes Ovarian Cancer?


• Ovarian Cancer Research Alliance (OCRA): Understanding Risk Factors.