In this study, data from previous studies showed that the cutoff level for TTR values was 22.8 mg/dL for gastric cancer, an average of 180.12±50.16 (mg/L) for lung cancer, and an average of 14.9±9.7 mg/dL for ovarian cancer, which were higher than the data in this study. This evidence concerns the gene TTR and lung carcinoma.