KRAS and neoplasm: R1 parenchymal resection, exposing the tumor edge during parenchymal dissection, was correlated to a higher rate of local recurrence in mutated KRAS tumors when compared to the KRAS wild type (respectively, local recurrence rate per patient: 25.4% vs. 18.3%; p = 0.404, in situ local recurrence rate: 19.5% vs. 9.9%; p = 0.048).