Helicobacter pylori infection with intestinal metaplasia: An independent risk factor for colorectal adenomas

Area of Science:

• Gastroenterology
• Oncology
• Infectious Diseases

Background:

• Helicobacter pylori (H. pylori) is a common bacterial infection affecting the upper gastrointestinal tract.
• Intestinal metaplasia (IM) is a precancerous condition often associated with H. pylori infection.
• Colorectal adenomas are common neoplastic polyps that can progress to colorectal cancer.

Purpose of the Study:

• To investigate the relationship between H. pylori infection status, intestinal metaplasia (IM), and the presence of colorectal adenomas.
• To determine if H. pylori infection and IM are independent risk factors for colorectal adenomas.
• To assess the combined effect of H. pylori infection and IM on colorectal adenoma risk.

Main Methods:

• Retrospective review of 1641 individuals aged 40 years or older.
• Data collection included physical examination, laboratory tests, 13C-urea breath testing, gastroscopy, colonoscopy, and interviews.
• Histopathological analysis of gastric and colorectal biopsies was used to confirm H. pylori infection, IM, and adenomas.

Main Results:

• The prevalence of H. pylori infection was 51.5% and colorectal adenomas was 18.1%.
• H. pylori infection was significantly associated with an increased risk of colorectal adenomas (adjusted OR = 1.359).
• Intestinal metaplasia was also linked to an elevated risk of colorectal adenomas (adjusted OR = 1.381).
• Individuals with both IM and H. pylori infection showed a significantly higher risk of colorectal adenomas (adjusted OR = 1.765).

Conclusions:

• H. pylori infection is a significant risk factor for colorectal adenomas.
• Intestinal metaplasia, particularly when co-occurring with H. pylori infection, is associated with a substantially increased risk of colorectal adenomas.
• These findings suggest a potential link between upper gastrointestinal inflammation and lower gastrointestinal neoplasia.