*3.5.6 Endometriosis and other cancers*

Saavalainen et al. observed a 40% decreased risk of oral and pharynx carcinoma. This decrease might be due to less exposure to HPV infection and complex alteration of immune response associated with HPV and endometriosis. Though not HPV-related, about ⅕th decrease in the incidence of pancreatic carcinoma was observed in women with endometriosis. The cause of this lower risk might be attributed to lifestyle modification and hormonal treatment for endometriosis [23].
