Different colors indicate tumors from different mice. Mouse #147, 5 tumors (white); #180, 4 tumors (blue); #154, 3 tumors (red); #158, 3 tumors (green); #159, 3 tumors (black); #189, 5 tumors (yellow); #228, 8 tumors (orange); #235, 5 tumors (gray); #236, 9 tumors (brown); #281, 1 tumor (pink); #460, 1 tumor (purple). Tumor location marked by overlaying dots on actual tissue photographs. Tumors not drawn to scale. All tumors were pathologically confirmed adenomatous polyps. Data = mean ± SEM.