Can adenomyosis cause cancer?

Adenomyosis itself is not cancer. It’s a benign condition where endometrial-like tissue grows into the muscular wall of the uterus, and it can cause heavy bleeding, painful periods, and an enlarged, tender uterus—but it doesn’t “turn into” cancer in the way many patients fear.

That said, adenomyosis can sometimes be seen alongside uterine (endometrial) cancer on hysterectomy pathology, which understandably raises questions about whether the two are connected. Current evidence doesn’t show that adenomyosis protects you from cancer or that it clearly causes cancer, and research on risk relationships is still evolving and can be mixed depending on the cancer type studied.

If you’re worried because of symptoms like heavier bleeding than usual, bleeding between periods, or new/worsening pelvic pain—especially if your symptoms are changing—our team can help you sort out what’s most likely going on, what testing is appropriate, and what treatment options (including surgical options when needed) make sense for your goals.