To explore the potential mechanism, we investigated the correlation between TMEM16A expression and mutation status of KRAS, NRAS, and BRAF, and the protein expression of most commonly used IHC Characteristics including BRAF (V600E), CDX2, EGFR, p53, Ki67, CD34, PMS2, MLH1, MSH6, and MSH2 in clinical CRC sample. The gene discussed is NRAS; the disease is colorectal carcinoma.