The specimen is a segment of transverse colon. In the central region there is an area of mucosal
thickening 10 cm in length. This consists of a confluence of numerous mucosal polyps.
Histological sections taken through the polypoid area show an inflammatory polyposis with
associated crypt abscess formation. Lymphoid aggregates are present within the mucosa and
The patient, a 77 year old female, has a previous history of ischaemic colitis and it was
considered that this localized area of confluent polyposis has resulted from mucosal inflammation