title: An atypical case of IgG4-related sclerosing pancreatitis on PET/CT imaging.
abstract: A 62-year-old man presented with pain in the upper abdomen persisting for 2 months. He had the clinical history of diabetes for approximately 10 years. CT and MRI showed a mass located in processus uncinatus of caput pancreatis. The laboratory tests, including pancreas-originated amylase, tumor marker, IgG, IgG4, and so on, were normal. For suspicion of pancreatic cancer, the patient underwent F-FDG PET/CT, which demonstrated focal and high radioactivity accumulation in processus uncinatus of pancreas, without extrapancreatic radioactivity uptake observed. Finally, the surgical pathology confirmed IgG4-related sclerosing pancreatitis.
authors.affiliation: From the *Departments of Nuclear Medicine and †Pathology, Zhongshan Hospital, Fudan University, Shanghai, China.
authors.forename: Lei
authors.initials: L
authors.lastname: Han
authors.forename: Lei
authors.initials: L
authors.lastname: Jiang
authors.forename: Hui
authors.initials: H
authors.lastname: Tan
authors.forename: Lingli
authors.initials: L
authors.lastname: Chen
authors.forename: Pengcheng
authors.initials: P
authors.lastname: Hu
authors.forename: Hongcheng
authors.initials: H
authors.lastname: Shi
mesh_terms: D006801:Humans; D007074:Immunoglobulin G / Q000276:immunology*; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D064847:Multimodal Imaging; D010195:Pancreatitis / Q000000981:diagnostic imaging* / Q000473:pathology; D049268:Positron-Emission Tomography; D014057:Tomography, X-Ray Computed
chemical_list: D007074:Immunoglobulin G