Distinct Patterns of Invasive Gastric Cancer After H. pylori Eradication

A large multicenter study analyzed 305 gastric cancer cases diagnosed during routine endoscopic surveillance following Helicobacter pylori eradication to identify distinguishing clinical features of invasive gastric cancer.

Key Findings:

• Invasive vs. Intramucosal Gastric Cancer:

  • 116 patients had invasive cancer (submucosal or deeper invasion).

  • 189 patients had intramucosal cancer.

• Risk Factors for Invasive Disease:

  • Prior gastric cancer history increased risk (adjusted OR: 2.67).

  • Tumors were more frequently located in the upper third of the stomach (OR: 2.63).

  • Absence of map-like redness was strongly associated with invasive disease (OR: 4.12).

• Subgroup Insights:

  • Invasive cancers with reduced map-like redness were more common in younger female patients.

  • Associated with antral intestinal metaplasia.

  • Tumors often showed undifferentiated or mixed histology.

Clinical Implications:

• Invasive gastric cancer can develop even after successful H. pylori eradication, sometimes in challenging locations or with difficult-to-detect features.

• Recognizing absence of map-like redness and upper stomach predilection may help refine surveillance protocols and enhance early detection of high-risk lesions.