Carcinoma in-situ and "micro invasive" adenocarcinoma of colon.

A case of in-situ and "micro invasive" carcinoma of the colon is reported in a patient who was neither a member of familial polyposis nor had suffered from ulcerative colitis. The in-situ and "micro-invasive" areas were seen in the flat otherwise non-raised mucosa of the colon remote from a large fungating carcinoma. Similar foci were also observed in random sections distal to the large mass. This is the first report of an in-situ and "micro-invasive" carcinoma of colon in a "non-ulcerative colitis" individual.