Endoscopic and histological assessment in first-degree relatives of gastric cancer patients undergoing gastroscopy: a cross-sectional study.

Background: First-degree relatives of gastric cancer (GC) patients are known to have an increased risk of developing GC. However, guidelines in low-intermediate incidence regions often lack specific recommendations for managing both asymptomatic and symptomatic relatives at risk.

Objective: This study aimed to evaluate the differences in relevant histological findings (e.g. Helicobacter pylori infection, gastric precancerous and neoplastic conditions) between asymptomatic patients undergoing esophagogastroduodenoscopy due to first-degree relatives with GC and patients with symptoms or other clinical indications and presence of first-degree relatives with GC. The secondary aim was to identify the patient's risk factors of relevant histological findings.

Methods: This single-center retrospective study included patients undergoing esophagogastroduodenoscopy with biopsies with the indication for first-degree relatives with GC from January 2008 to September 2022. They were analyzed in two groups based on whether they had additional symptoms or clinical indications for esophagogastroduodenoscopy.

Results: Overall, 283 patients were included (54.5% asymptomatic vs. 45.5% symptomatic). Histological findings that led to changes in patient management were identified in 32% of cases. No significant differences in histological findings between the two groups were observed ( P = 0.077). A subanalysis revealed that patients with male relatives affected by GC had a higher incidence of relevant histological findings than those with female family members with GC ( P = 0.013) with an odds ratio of 3.10.

Conclusions: First-degree relatives of GC patients may be at risk for H. pylori infection and gastric precancerous conditions regardless of symptoms or other indications, and a proactive endoscopic screening could be considered even in countries with low GC incidence.