Chronic Atrophic Gastritis: A Review

Area of Science:

• Gastroenterology
• Oncology
• Immunology

Background:

• Chronic atrophic gastritis involves gastric mucosa atrophy and is a significant risk factor for gastric cancer.
• Two primary types exist: Helicobacter pylori (H. pylori)-associated gastric body predominant gastritis and a rarer autoimmune gastritis affecting the gastric body and fundus.
• H. pylori infection is a prevalent, class I carcinogen linked to numerous gastric cancer cases.

Purpose of the Study:

• To differentiate between H. pylori-associated and autoimmune atrophic gastritis.
• To outline the pathogenesis and diagnostic approaches for both types.
• To recommend appropriate management strategies for patients with chronic atrophic gastritis.

Main Methods:

• Diagnosis of H. pylori infection relies on endoscopy and microbial culture.
• Autoimmune gastritis pathogenesis involves antibody-mediated parietal cell and intrinsic factor loss.
• Evaluation for pernicious anemia and vitamin B12 deficiency is essential for autoimmune cases.

Main Results:

• H. pylori infection is a major cause of atrophic gastritis and gastric cancer.
• Autoimmune gastritis leads to achlorhydria and pernicious anemia.
• Treatment involves H. pylori eradication with antibiotics and vitamin B12 supplementation for autoimmune gastritis.

Conclusions:

• Prompt diagnosis and management of chronic atrophic gastritis are vital for preventing gastric cancer progression.
• Eradication of H. pylori and addressing vitamin B12 deficiencies are key therapeutic goals.
• Understanding the distinct mechanisms of H. pylori-associated and autoimmune gastritis guides patient care.