| Type | MGI:General | Description | 100% of mice have hyperplastic polyps in the stomach at 9 months of age tumors increase in size from an average of 3 mm in size at 9 months to 8 mm in size at 18 months in the pyloric/duodenal transition area, 100% of mice over 12 months in age have polyps with some exhibiting a carpet of polyps polyps were hyperplastic with branching villi and occasionally have serrated edges |
