STK11 and neoplasm: Although the total STK11 expression was lower in tumor samples with STK11ex1-2 and STK11ex3-9 mutations (P < .0001) as compared to WT, the relative expression of exons 3 to 10 was higher in tumors with STK11ex1-2 mutations than in those with STK11ex3-9 mutations (P = .003, e-Figure 3).