For instance, compared with wild-type mice, Mth1-deficient mice developed a greater number of tumors in their lungs, livers and stomachs 18 months post-birth, and an analysis of the total number of tumor-bearing mice showed that the percentage of Mth1-deficient mice (36%) was significantly higher than that of wild-type mice (11%) [64]. The gene discussed is NUDT1; the disease is neoplasm.