Despite the fact that endometriosis and cancer are two separated diseases, there is evidence that suffering from endometriosis increases the risk of developing cancer later in life, in particular ovarian cancer. The relation between the two is not fully understood, but there is one hypothesis. Since endometriosis is the reason for infertility in 50% of women who cannot conceive, the explanation may have something to do with the lack of having children. Conceiving and giving birth is known to offer some protection against ovarian cancer.
On the other hand, it is also known that suffering from endometriosis does not increase vigilance of the reproductive system, which could improve early detection and diagnosis. In addition to ovarian cancer, other cancers that may be more likely in patients with endometriosis include lymphoma and breast cancer, but the development of cancer tends to occur later in patients’ lives, according to the Endometriosis Foundation of America.