%0 Journal Article
%T Lymphocytic Gastritis Identified by Abnormal PET Scan
%A Benjamin Swanson
%A Christopher J. Murphy
%A Michael Markow
%A Peter P. Stanich
%J Archive of "ACG Case Reports Journal".
%D 2017
%R 10.14309/crj.2017.62
%X A 20-year-old man presented for evaluation of diffuse abdominal pain. He had completed chemotherapy 2 months earlier for stage IV diffuse large B-cell lymphoma (DLBCL). On a recent positron emission topography (PET) scan, he was found to have a new area of intense activity within the proximal stomach (Figure 1). Upper endoscopy showed scattered shallow ulcers throughout the stomach (Figure 2). Gastric biopsies demonstrated lymphocytic gastritis-type pattern with acute inflammation and reactive gastropathy (Figure 3). On further immunostaining, the lymphocytes were CD3+ T-cells rather than the B-cells expected in recurrent DLBCL. This confirmed the diagnosis of lymphocytic gastritis. Helicobacter pylori and celiac disease serologies were negative. His symptoms resolved within a few days of daily proton pump inhibitor (PPI) usage, and upper endoscopy and repeat PET demonstrated resolution (Figure 4)
%U https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5407359/