Two heterozygous F344-Tp53 females presented with mammary adenocarcinoma, representing a similarity between the two models, in that 6 out of 31 female STOCK-Tp53 heterozygous rats displayed mammary carcinomas, compared to 2 out of 13 cases of mammary adenocarcinoma in the F344-Tp53 rats (Yan et al., 2012). Here, TP53 is linked to breast carcinoma.