Histopathological features of mammary tumors from K14cre;p53F/F and K14cre;Brca1F/F;p53F/F female mice. Microphotographs of representative tumor sections stained with H&E (A, D, G, and J), or with antibodies against CK8 (B, E, H, and K), vimentin (C, F, and L), or smooth muscle actin (SMA) (I). (A–C) Solid carcinoma, resembling high-grade IDC-nos in humans. (D–F) Poorly differentiated biphasic carcinoma, resembling carcinosarcoma in humans. (G–I) Well differentiated biphasic carcinoma, resembling adenomyoepithelioma in humans. (J–L) Carcinoma with chondroid metaplasia.