Recent findings suggest that TK1 expression influences the proliferation of lung cancer, thyroid carcinoma, prostate cancer, melanoma, and pancreatic cancer cells [4,5,6,7,8], but inconsistent results on migration and invasion have been reported in lung cancer, prostate cancer, and thyroid carcinoma [4,6,7]. The gene discussed is TK1; the disease is familial pancreatic carcinoma.