Serum Gastrin Levels Are Associated With Prevalent Neuroendocrine Tumors in Autoimmune Metaplastic Atrophic Gastritis.

Jove, Andre; Lin, Christina; Hwang, Joo Ha; Balasubramanian, Vidhya; Fernandez-Becker, Nielsen Q; Huang, Robert J · Am J Gastroenterol · 2025

retrospective_cohort · Level III

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Abstract

Autoimmune metaplastic atrophic gastritis (AMAG) is a precancerous condition that predisposes to gastric neuroendocrine tumors (gNETs). There exist no methods to stratify patients with AMAG for gNET risk. We identified a cohort of patients with AMAG within a university health system using histopathologic and serologic criteria. We analyzed features predictive of prevalent gNET. We identified 181 patients with AMAG and 41 (22.7%) with prevalent gNET. Gastrin levels were elevated in gNET (1,859.8 vs 679.5 pg/mL, P < 0.001), and gastrin titers demonstrated good discrimination (c = 0.799, 95% CI 0.707-0.892) for gNET. Gastrin levels differ significantly between patients with AMAG with and without gNET.

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