Dual Polyp Presence Significantly Elevates Bowel Cancer Risk, Study Finds

Novel research from Flinders University and Flinders Medical Centre reveals a concerning link between the simultaneous presence of two common types of bowel polyps – adenomas and serrated polyps – and a substantially increased risk of developing colorectal cancer. The findings, published in Clinical Gastroenterology and Hepatology, underscore the importance of regular colonoscopy screening and vigilant follow-up care.

Understanding Colorectal Cancer and Polyps

Colorectal cancer remains a significant public health challenge in Australia, ranking as the second leading cause of cancer death and the fourth most frequently diagnosed cancer. Many colorectal cancers originate as polyps, abnormal growths on the inner lining of the bowel. While typically benign initially, certain polyp types can evolve into cancer over time.

The Connection Between Adenomas and Serrated Polyps

Researchers analyzed colonoscopy records of over 8,400 patients. The analysis revealed that individuals with both adenomas and serrated polyps exhibited a risk of developing advanced precancerous changes up to five times greater than those with only one type of polyp.

“Polyps are common and usually harmless, but when both types appear together – what we call synchronous lesions – the risk of serious bowel disease or cancer rises sharply,” explains Dr. Molla Wassie, lead author and researcher at the Flinders Medical Centre’s Bowel Health Service.

The study also indicated that this combination of polyps may be more prevalent than previously recognized, with nearly half of patients diagnosed with serrated polyps also found to have adenomas.

Separate Cancer Pathways and Early Detection

Dr. Wassie emphasizes that the findings support growing evidence suggesting that adenomas and serrated polyps may represent distinct cancer pathways that can operate concurrently. This highlights the critical need for early detection and consistent monitoring.

The research also suggests that serrated polyps might progress to cancer more rapidly than adenomas, reinforcing the importance of tailored screening strategies and follow-up colonoscopy schedules based on polyp type.

The Importance of Colonoscopy Screening

“Polyps become more common as we age, but the key is catching and removing them early,” says Dr. Wassie. “If you’ve had both types of polyps, it’s especially important to stay on top of your colonoscopy schedule.”

Individuals aged 45 and older, or those with a family history of bowel disease, are encouraged to discuss screening options with their general practitioner or explore the National Bowel Cancer Screening Program.

Flinders Medical Centre Gastroenterology Services

The Department of Gastroenterology and Hepatology at Flinders Medical Centre offers comprehensive services, including:

• Gastrointestinal Endoscopy
• Hepatology and Transplant Medicine
• Inflammatory Bowel Disease management
• Colorectal Cancer screening and surveillance

The Gastroenterology Clinic at Flinders Medical Centre provides consultation, procedures, therapeutic services, and management for conditions such as complex reflux disease, dysphagia, gastrointestinal bleeding, and iron deficiency anemia.