Seronegative autoimmune atrophic gastritis is more common in elderly patients

Background Autoimmune atrophic gastritis (AAG) diagnosis is based on specific histological findings and anti-parietal cell antibodies (PCA) considered the serological hallmark of AAG, although a subgroup of AAG patients may be seronegative. Objectives To assess the occurrence and clinical features of seronegative compared to seropositive AAG. Methods This is a cross-sectional study including 516 consecutive adult patients (age 59.6 ± 12.8 years,...