Related Experiment Videos
Colorectal cancer in inflammatory bowel disease: a continuing problem.
R Mayer1, W D Wong, D A Rothenberger
1The Department of Surgery, University of Minnesota and the University of Minnesota Comprehensive Cancer Center, Minneapolis, USA.
Diseases of the Colon and Rectum
|May 1, 1999
Summary
Colorectal cancer in inflammatory bowel disease (IBD) patients often occurs younger and presents as mucinous or multifocal tumors. Current surveillance colonoscopy may not be fully effective in preventing or enabling early diagnosis of IBD-associated colorectal cancer.
Area of Science:
- Gastroenterology
- Oncology
- Colorectal Surgery
Background:
- Inflammatory bowel disease (IBD) increases colorectal cancer (CRC) risk.
- Surveillance colonoscopy with biopsies is recommended for IBD patients to detect dysplasia and prevent CRC.
- Despite surveillance, IBD-associated CRC remains a clinical concern.
Purpose of the Study:
- To characterize patients with IBD-associated colorectal cancer.
- To evaluate the effectiveness of current surveillance strategies.
Main Methods:
- Retrospective analysis of 40 large-bowel resections for IBD and CRC from 1983-1995.
- Review of clinical presentation, pathology, and follow-up data.
Main Results:
- Mean age at CRC diagnosis was 48 years, with average IBD duration of 19 years.
- 92% of cancers were identified preoperatively via colonoscopy, often due to new symptoms.
- Dysplasia was not preoperatively diagnosed in 68% of patients; tumors were frequently mucinous, multicentric, and left-sided.
Conclusions:
- CRC in IBD patients occurs at a younger age with distinct tumor characteristics.
- Current dysplasia surveillance may not be sufficiently effective in reducing CRC mortality in IBD patients.
- A significant proportion of cancers were diagnosed due to symptom changes rather than routine surveillance.