NCIt definition : A rare type of gastritis characterized by gastric subepithelial collagen deposition
and inflammatory infiltrates in the lamina propria. The pathogenesis of this disorder
is unclear although an association with autoimmune disorders has been reported. It
affects both children and adults. Children present with iron deficiency anemia and
have a nodular stomach on gastroscopy. Adults present with chronic watery diarrhea
and may have an associated collagenous colitis.;