Proportion and Characteristics of Helicobacter Pylori-Negative Gastric Mucosa-Associated Lymphoid Tissue Lymphoma: A Systematic Review and Meta-Analysis

• Published in: Clinical and translational gastroenterology Vol. 16; no. 4; p. e00781
• Main Authors: Lv, Xiu-He, Lu, Qing, Liu, Jia-Huan, Xia, Bi-Han, Wang, Zi-Jing, Wang, Zhu, Yang, Jin-Lin
• Format: Journal Article
• Language: English
• Published: Philadelphia, PA Wolters Kluwer 01.04.2025; Wolters Kluwer Health Medical Research, Lippincott Williams & Wilkins
• Subjects: Bias; Breath tests; Content analysis; Cross-sectional studies; Data collection; Gastric Mucosa - microbiology; Gastric Mucosa - pathology; Helicobacter Infections - complications; Helicobacter Infections - diagnosis; Helicobacter Infections - epidemiology; Helicobacter Infections - microbiology; Helicobacter pylori - isolation & purification; Histology; Humans; Infections; Lymphoma; Lymphoma, B-Cell, Marginal Zone - diagnosis; Lymphoma, B-Cell, Marginal Zone - epidemiology; Lymphoma, B-Cell, Marginal Zone - microbiology; Lymphoma, B-Cell, Marginal Zone - pathology; Male; Neoplasm Staging; Patients; Review; Serology; Stomach Neoplasms - epidemiology; Stomach Neoplasms - microbiology; Stomach Neoplasms - pathology; Systematic review; China; meta-analysis; risk factor; mucosa-associated lymphoid tissue lymphoma
• ISSN: 2155-384X; 2155-384X
• DOI: 10.14309/ctg.0000000000000781

INTRODUCTION:While Helicobacter pylori (H. pylori) infection is common in patients with gastric mucosa-associated lymphoid tissue (MALT) lymphoma, there are still individuals who test negative for it. The proportion and characteristics of these patients remain unclear.METHODS:We conducted a systematic search of the PubMed, Embase, and Cochrane Library databases for relevant articles. Using a random-effects model, we performed a meta-analysis to assess the pooled proportion of gastric MALT lymphoma patients with negative H. pylori tests. In addition, we compared characteristics between gastric MALT lymphoma patients with and without H. pylori infection to examine clinical features in H. pylori-negative cases.RESULTS:A total of 50 studies involving 6,033 patients were included. The overall proportion of gastric MALT lymphoma patients with negative H. pylori tests was 20.5% (95% confidence interval: 17.0%-24.6%). This rate exhibited an increasing trend over the years, particularly in non-Asian countries and in studies published after 2013, as well as in cases with sample sizes exceeding 100 patients, in male individuals, and among those with proximal or multiple lesions, nonsuperficial type morphology, submucosal invasion, and advanced clinical staging. Compared with H. pylori-positive patients, those who tested negative were more likely to be male, have proximal lesions, exhibit submucosal invasion, and present with an advanced clinical stage.DISCUSSION:This study provides comprehensive information on the proportion and characteristics of H. pylori-negative gastric MALT lymphoma cases, highlighting the need for future clinical attention to treatment and surveillance in this patient population.