Studies show a close relationship between mutations in the STK11 tumor suppressor gene and various female reproductive tract cancers, as seen in Peutz-Jeghers syndrome (PJS), which manifests as various female reproductive tract tumors, such as endometrial carcinoma, cervical mucinous adenocarcinoma, and ovarian tubular sex cord tumors. The gene discussed is STK11; the disease is Peutz-Jeghers syndrome.