STK11 and hepatocellular carcinoma: Human STK11 gene is located on chromosome 19p13.3 [14]; loss-of-function mutations in its coding sequence have been found in lung [15,16], breast [17,18], cervical [15], pancreatic and biliary carcinomas [15,19,20], and also in testicular cancer, malignant melanoma [21,22], hepatocellular carcinoma [23], and HNC [24].