We performed PCNA staining (a marker of cells in early G1 and S phase) of PND84 tumors in selected sections of Cdh11+/+;TAg+/- (n = 2) and Cdh11-/-; TAg+/- (n = 2) mice and calculated the percent PCNA positive cells per tumor volume revealing little difference between the two genotypes. The gene discussed is PCNA; the disease is neoplasm.