BIRC2 and colorectal carcinoma: cIAP1 mRNA expression did not show differentiation depending on KRAS mutation status of CRC tissues, as it was found significantly decreased in both KRAS mutant and KRAS wild-type CRC tissues (p = 0.0167 and p = 0.0367, respectively) (Fig. 4B), although it was more significant in KRAS mutant tissues.