NRAS and non-small cell lung carcinoma: In humans, different members of ras family have been found in particular types of malignant tumors; N-ras in low grade serous ovarian, melanoma and k-ras (v-ki-ras2 Kirsten sarcoma viral oncogene homolog) in colorectal carcinoma and non-small cell lung cancer (NSCLC) (1-4).