Identifying the Profile of Helicobacter pylori-Negative Gastric Cancers: A Case-Only Analysis within the Stomach Cancer Pooling (StoP) Project

• Type: Article in International Scientific Journal
• Date: 2022

Authors

Morais, S (Author) Other; peleteiro, b (Author) FMUP; Araujo, N (Author) FMUP; Malekzadeh, R (Author) Other; Ye, WM (Author) Other; Plymoth, A (Author) Other; Tsugane, S (Author) Other; Hidaka, A (Author) Other; Hamada, GS (Author) Other; Lopez Carrillo, L (Author) Other; Zaridze, D (Author) Other; Maximovich, D (Author) Other; Aragones, N (Author) Other; Castano Vinyals, G (Author) Other; Pakseresht, M (Author) Other; Hernandez Ramirez, RU (Author) Other; Lopez Cervantes, M (Author) Other; Leja, M (Author) Other; Gasenko, E (Author) Other; Pourfarzi, F (Author) Other; Zhang, ZF (Author) Other; Yu, GP (Author) Other; Derakhshan, MH (Author) Other; Pelucchi, C (Author) Other; Negri, E (Author) Other; La Vecchia, C (Author) Other; Lunet N (Author) FMUP

Journal

Title: Cancer Epidemiology Biomarkers and Prevention

Vol. 31

Pages: 200-209

ISSN: 1055-9965

Publisher: American Association for Cancer Research

Indexing

ISI Web of Knowledge - 5 Citations

Scopus - 8 Citations

Other information

Authenticus ID: P-00W-0CB

DOI: 10.1158/1055-9965.epi-21-0402

Abstract (EN): Background: The prevalence of Helicobacter pylori-negative gastric cancer (HpNGC) can be as low as 1%, when infection is assessed using more sensitive tests or considering the presence of gastric atrophy. HpNGC may share a high-risk profile contributing to the occurrence of cancer in the absence of infection. We estimated the proportion of HpNGC, using different criteria to define infection status, and compared HpNGC and positive cases regarding gastric cancer risk factors. Methods: Cases from 12 studies from the Stomach cancer Pooling (StoP) Project providing data on H. pylori infection status determined by serologic test were included. HpNGC was reclassified as positive (eight studies) when cases presented CagA markers (four studies), gastric atrophy (six studies), or advanced stage at diagnosis (three studies), and were compared with positive cases. A two-stage approach (random-effects models) was used to pool study-specific prevalence and adjusted odds ratios (OR). Results: Among non-cardia cases, the pooled prevalence of HpNGC was 22.4% (n = 166/853) and decreased to 7.0% (n = 55) when considering CagA status; estimates for all criteria were 21.8% (n = 276/1,325) and 6.6% (n = 97), respectively. HpNGC had a family history of gastric cancer more often [OR = 2.18; 95% confidence interval (CI), 1.03-4.61] and were current smokers (OR = 2.16; 95% CI, 0.52-9.02). Conclusion: This study found a low prevalence of HpNGC, who are more likely to have a family history of gastric cancer in first-degree relatives. Impact: Our results support that H. pylori infection is present in most non-cardia gastric cancers, and suggest that HpNGC may have distinct patterns of exposure to other risk factors.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 10