Germline mutations in the LKB1 tumor suppressor gene (a.k.a. STK11) result in Peutz-Jeghers Syndrome (PJS), a hereditary condition characterized by benign gastrointestinal polyps and an elevated (>15×) risk of malignant epithelial cancers at various anatomic sites [8]. This evidence concerns the gene STK11 and Peutz-Jeghers syndrome.