[Hyperplastic colorectal polyposis]. / Hyperplastisk kolorektal polypose.

Two cases of hyperplastic polyposis are presented, a 59-year-old female with >50 colorectal serrated polyps in a pancolic distribution and a 69-year-old female with four mucinous colorectal carcinomas and seven serrated polyps, three of which >10 mm. The pathological tissue of the latter patient was confined to the right colon and the neoplastic areas displayed loss of MLH1 expression. Three first degree relatives of this patient had carcinoma of the large bowel, breast and ovary, respectively. A first degree relative of the former patient succumbed to a colorectal carcinoma.