Which cancers are linked to endometriosis, and how strong is the evidence?

The strongest and most consistent evidence linking endometriosis to cancer involves certain ovarian cancer subtypes—especially clear cell and endometrioid ovarian cancer. This is an association seen across multiple studies, but it’s important to understand what that means: the risk increase is relative compared with people without endometriosis, and it still does not mean cancer is expected or common.

Endometriosis is a benign condition, and most patients with endometriosis will never develop cancer. If you’re concerned about your personal risk—especially with an ovarian mass, persistent one-sided pain, or new symptoms that don’t fit your usual pattern—our team can help evaluate what’s going on and discuss appropriate next steps, including imaging review and surgical options when needed.