Treatment of neonatal Dmp1-deficient mice with dimethylbenzanthracene (DMBA) or ionizing radiation helped to develop multiple tumors, including lung, skin, and liver carcinomas, T-cell leukemia/lymphomas, and ovarian tumors (Inoue et al. 2000, 2001; Fig. 2). The gene discussed is DMP1; the disease is lymphoma.