A 22-year-old medical student from Delhi presents with 4 months of epigastric pain, early satiety, and postprandial bloating. Stool antigen testing is positive for Helicobacter pylori. Upper endoscopy reveals the antrum with a striking pattern of uniform, numerous small (1–3 mm) mucosal nodules with a miliary, cobblestone appearance—the classic finding shown as **A** in the diagram. Targeted antral biopsies show marked chronic inflammation with lymphoid follicles bearing germinal centers, neutrophilic infiltration, and abundant curved, rod-shaped organisms on silver staining. Which of the following best describes the pathophysiological basis of the nodular appearance marked **A**?
A. Intestinal metaplasia of gastric foveolar epithelium secondary to prolonged acid hypersecretion
B. Formation of reactive lymphoid aggregates with germinal centers in response to chronic antigenic stimulation by H. pylori
C. Dysplastic transformation of surface epithelium with loss of normal mucosal architecture
D. Erosive damage to the mucosa with subsequent regenerative hyperplasia and fibrosis
Explanation
Why "Formation of reactive lymphoid aggregates with germinal centers in response to chronic antigenic stimulation by H. pylori" is right
Nodular antral gastritis (also called lymphofollicular gastritis) is the direct result of the host immune response to chronic H. pylori colonization. The histological hallmark—lymphoid follicles with germinal centers in the lamina propria—corresponds exactly to the endoscopic nodular appearance marked A. These reactive lymphoid aggregates represent organized lymphoid tissue forming in situ as a response to persistent bacterial antigenic stimulation. The endoscopic miliary, cobblestone pattern is the visual manifestation of these submucosal lymphoid follicles. This finding has a high positive predictive value (>90%) for H. pylori infection and is recognized in the Kyoto Classification of Gastritis as a key endoscopic feature (Sleisenger and Fordtran 11e Ch 51; Maastricht VI/Florence Consensus Gut 2022).
Why each distractor is wrong
Intestinal metaplasia of gastric foveolar epithelium secondary to prolonged acid hypersecretion: Intestinal metaplasia is a consequence of chronic atrophic gastritis and represents loss of normal gastric mucosa, not formation of lymphoid nodules. The biopsies in this case explicitly showed no intestinal metaplasia. Intestinal metaplasia is a precancerous change, not the primary mechanism of nodular gastritis.
Erosive damage to the mucosa with subsequent regenerative hyperplasia and fibrosis: Nodular gastritis is not erosive in nature—the endoscopic appearance shows intact nodular mucosa with mild erythema between nodules, not ulceration or erosion. Regenerative hyperplasia and fibrosis would produce a different histological and endoscopic pattern (scarring, stricture risk).
Dysplastic transformation of surface epithelium with loss of normal mucosal architecture: The biopsies showed no dysplasia or evidence of malignant transformation at present. Dysplasia would be a late complication of chronic H. pylori infection (leading to intestinal metaplasia → dysplasia → carcinoma), not the primary basis of the nodular appearance. Nodular gastritis itself reflects reactive, not neoplastic, change.
High-YieldNEET PG
Nodular antral gastritis = lymphofollicular gastritis = reactive lymphoid aggregates with germinal centers in response to H. pylori; endoscopic miliary pattern mirrors submucosal lymphoid follicles; most common in children and young adults; high PPV (>90%) for H. pylori; resolves after eradication.
Sleisenger and Fordtran 11e Ch 51; Maastricht VI/Florence Consensus Gut 2022; Kamada Helicobacter 2007 nodular gastritis
Practice similar questions
Sign up free to access AI-powered MCQ practice with detailed explanations and adaptive learning.
