№ 12Gastroenterology14 min read
Premalignant disorders of the colon and rectum
1. Big picture
Premalignant disorders of the colon and rectum are conditions that increase the risk of colorectal carcinoma before invasive cancer has developed. The most important group is colorectal polyps, especially adenomatous polyps and serrated lesions.
The examiner wants you to know:
- Which lesions are premalignant
- Which features make a polyp high-risk
- Which hereditary syndromes cause colorectal cancer
- How to screen and surveil
- When endoscopic removal is enough and when surgery/genetic testing is needed
Core exam sentence:
Most colorectal cancers arise from premalignant polyps through the adenoma–carcinoma sequence or serrated pathway; colonoscopy prevents cancer because it detects and removes these lesions.
Unlock the rest of this topic
Subscribe to Internal Medicine for $10/month and unlock all 229 topics — full exam-structured notes, the State Exam questions integrated into every topic, and the downloadable Anki deck. Cancel anytime.
- ✓All 229 Internal Medicine topics, exam-structured
- ✓State Exam questions in every topic
- ✓Downloadable Anki deck (.apkg)
- ✓Cancel anytime
Already subscribed? Sign in