Recent Study: Removal of Inflamed Appendix May Reduce Colon Cancer Risk
Results from a recent study, which analyzed more than 30,000 cases, showed that patients who underwent surgical removal of an inflamed appendix were significantly less likely to develop colorectal cancer compared to those treated with antibiotics. Surgery had previously been the standard treatment for acute appendicitis. Dr. Valentine Nephonsam of Morehouse School of Medicine in Atlanta, who led the research team, told Reuters that the treatment for this condition “has changed dramatically over the past decade, and antibiotic therapy is now an acceptable option.” Previous comparisons between the two approaches focused on short-term outcomes.
The researchers reviewed data from 15,774 patients diagnosed with acute appendicitis who underwent appendectomy, and data from 15,295 patients treated with antibiotics alone. The findings, presented at the American College of Surgeons congress in Washington, revealed that in the years following treatment, colorectal cancer was diagnosed in 0.7% of the appendectomy group and in 1.7% of the antibiotic group. After accounting for individual risk factors, appendectomy was associated with a 58% reduction in the risk of developing colorectal cancer later in life.
Dr. Nephonsam noted that it was previously believed that the appendix was useless, but recent research indicates this is incorrect, as the appendix plays a role in the gut immune system and the microbiome—the microscopic organisms living in the digestive tract. He pointed out that the question of whether chronic inflammation or changes in the gut microbiome contribute to cancer development is biologically worthy of investigation, but the study was not designed to answer that question.
“These results should not be interpreted to mean that everyone with appendicitis needs their appendix removed to prevent cancer,” he said. “Antibiotic therapy remains an important option. However, when discussing non-surgical treatment, we must also consider factors beyond appendicitis itself, including potential long-term risks of tumor development and the need for appropriate follow-up.”
