At the same time, mutations in the KRAS gene are most often found in pancreatic carcinoma, colorectal and lung cancer; mutations in the HRAS gene commonly diagnosed in skin cancer and tumors of the head and neck (especially rhabdomyosarcoma); and NRAS mutations can be detected in melanoma and hematological malignancies (55). This evidence concerns the gene KRAS and exocrine pancreatic carcinoma.