IgG4-Related Diseases; Autoimmune Pancreatitis and Lymphadenitis
PET/CT FOR INFLAMMATORY DISEASES: BASIC SCIENCES, TYPICAL CASES, AND REVIEW（2020）
Abstract
An 80-year-old man received FDGPET/CT for preoperative staging of gastric cancer. PET/CT images showed diffuse pancreatic FDG uptake as well as abnormal uptake into the bilateral supraclavicular, mediastinal, hilar, and abdominal lymph nodes and retroperitoneal soft tissue. His serum IgG4 was elevated. Pathological examination of a gastro-duodenal specimen revealed infiltration of numerous IgG4-positive plasma cells to confirm a diagnosis of IgG4-related disease. Diffuse or multifocal pancreatic FDG uptake is a characteristic finding of IgG4-related autoimmune pancreatitis. Extra-pancreatic uptake in specific organs is also helpful to identify IgG4-related disease.
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Key words
Autoimmune pancreatitis, IgG4-related disease, lymphadenopathy
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