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IgG4-Related Disease Complicated with Diffuse and Chronic Gastrointestinal Inflammation Leading to Small Intestinal Perforation.
Modern rheumatology case reports. 2024 March 29
Immunoglobulin (Ig) G4-related disease (IgG4-RD) is a systemic inflammatory disease characterized by elevated serum IgG4, IgG4+ cell infiltration, storiform fibrosis, and obliterative phlebitis. While IgG4-RD can affect various organs, gastrointestinal tract involvement is less common. Here, we report a 70-year-old female with IgG4-RD complicated with diffuse and chronic gastrointestinal inflammation which led to small intestinal perforation. She had been suffering from anorexia, abdominal pain, vomiting, and diarrhea, and hospitalized due to recurrent ileus. Consequently, she was referred due to small intestinal perforation required for surgical intervention. Pathology revealed acute and chronic inflammation with massive IgG4+ plasmacytes infiltration into mucosa of the small intestine, and ischemic change secondarily caused by chronic inflammation. Random biopsies from the mucosa of stomach, duodenum, ileum, and colon, also revealed diffuse and massive IgG4+ plasmacytes infiltration in stomach, duodenum, small intestine, and colon. She was diagnosed with IgG4-RD based on the pathological findings and elevated serum IgG4 levels. Glucocorticoid rapidly ameliorated the symptoms. IgG4-RD may cause gastrointestinal manifestations and histopathological assessment should be considered, even in the absence of specific characteristics of IgG4-RD.
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