Which are the causes of Endometrial cancer?

TL;DR: Endometrial cancer is primarily caused by an imbalance of hormones, specifically excess estrogen relative to progesterone, which leads to the overgrowth of the uterine lining. While the exact trigger for every case is not fully understood, the disease is driven by a combination of genetic mutations, metabolic factors, and hormonal signaling pathways.

What causes Endometrial cancer at a cellular level?

At its core, Endometrial cancer develops when cells in the lining of the uterus (the endometrium) undergo genetic changes that cause them to grow uncontrollably. Think of the uterus as a garden: estrogen acts like fertilizer, encouraging the lining to thicken. If there is too much "fertilizer" without the "pruning" effects of progesterone, cells can begin to divide abnormally, eventually forming a tumor.

Is Endometrial cancer hereditary?

While most cases are sporadic, approximately 5% to 10% of Endometrial cancer diagnoses are linked to inherited genetic syndromes. The most notable is Lynch syndrome (Hereditary Non-Polyposis Colorectal Cancer), caused by mutations in DNA mismatch repair genes (such as MLH1, MSH2, MSH6, or PMS2). Individuals with these mutations have a significantly higher lifetime risk of developing Endometrial cancer.

What are the primary risk factors for Endometrial cancer?

It is important to distinguish between "causes" (the biological mechanism) and "risk factors" (lifestyle or health elements that increase the likelihood of the disease). Key risk factors for Endometrial cancer include:

• Obesity: Adipose tissue converts other hormones into estrogen, increasing cumulative exposure.


• Hormonal therapy: Long-term use of estrogen-only replacement therapy without progesterone.


• Reproductive history: Early onset of menstruation (before age 12) or late menopause (after age 52).


• Metabolic conditions: Type 2 diabetes and Polycystic Ovary Syndrome (PCOS) are strongly associated with increased risk.

How is research evolving regarding the etiology of Endometrial cancer?

Current research into Endometrial cancer is focused on molecular classification, specifically identifying the genomic "fingerprints" of tumors. Scientists are studying how the tumor microenvironment interacts with the immune system to better understand why some forms of Endometrial cancer are more aggressive than others. Ongoing studies aim to create more personalized, targeted therapies based on these unique genetic profiles.

Next steps

• Consult a gynecologic oncologist to discuss your specific risk profile and family history.


• Join our community of 31 members at DiseaseMaps.org to share experiences with others managing Endometrial cancer.


• Maintain regular screening if you have a known family history of Lynch syndrome.

Medical disclaimer: This information is for educational purposes only and should not replace professional medical advice, diagnosis, or treatment.

References

• National Cancer Institute (NCI) – Endometrial Cancer Prevention and Risk Factors.


• NIH Genetic and Rare Diseases Information Center (GARD) – Lynch Syndrome.


• American Cancer Society – What Causes Endometrial Cancer?


• Orphanet – Rare Diseases Database.