Female CB‐17 severe combined immunodeficient (SCID) mice (6–8 weeks old) received 100 mg/kg of EGCG dissolved in 100 μL of water every 2 days via oral gavage, whereas the mock‐treated group received only water. Mice were sacrificed when the mock group's tumor volume reached approximately 1000 mm3. Tumors were excised, sectioned, and stained with Ki67 or PARP antibody. Relative ratio of TUNEL‐positive cells was calculated from 10 randomly selected microscopic fields in each group. The gene discussed is MKI67; the disease is neoplasm.