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Residual mucosal islands between ulcerated and denuded areas of mucosa may have a polypoid appearance and are referred to as pseudopolyps. [4] Polyposis syndromes, such as familial adenomatous polyposis, could give rise to a similar appearance on imaging, although the clinical presentation would differ from that of inflammatory pseudopolyposis. [5]
A colorectal polyp is a polyp (fleshy growth) occurring on the lining of the colon or rectum. [1] Untreated colorectal polyps can develop into colorectal cancer . [ 2 ]
PPCS is caused by an electrocautery-induced injury to the wall of the colon that occurs during removal of colon polyps. [3] PPCS occurs when the electric current extends beyond the mucosa, entering the muscularis propria and serosa, resulting in a full thickness (transmural) burn injury. [1]
While colon polyps are not commonly associated with symptoms, occasionally they may cause rectal bleeding, and on rare occasions pain, diarrhea or constipation. [9] They are a concern because of the potential for colon cancer being present microscopically, and the risk of benign colon polyps becoming malignant over time. [10]
For example the mucosal changes that occur with external rectal prolapse can be separated from the mucosal changes seen in SRUS. [ 6 ] The excessive pressure caused by straining (dyssynergic defecation and constipation) may in the long term lead to development of the spectrum of rectal prolapse conditions (mucosal versus full-thickness prolapse ...
Solitary rectal ulcer syndrome (SRUS) is a rare benign disease characterized by symptoms, clinical findings, and histological abnormalities. [9] Only 40% of patients have ulcers; 20% of patients have a single ulcer, and the remaining lesions range in size and form from broad-based polypoid to hyperemic mucosa. [10]
Depending on the nature of the defect in the APC gene, and whether it is the full or attenuated form, familial polyposis may manifest as polyps in colon or in the duodenal tract, or in any combination of these. Therefore, an absence of polyps in, for example, the rectum, may not of itself be sufficient to confirm absence of polyps.
Such polyps are termed "inverted hyperplastic polyps". They appear to be restricted to the sigmoid colon and rectum. The misplaced epithelium is mucin-depleted, similar to the basal one-third of the polyp. The misplacement is accompanied by the lamina propria and is continuous with the overlying polyp through a gap in the muscularis mucosae. It ...