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A case of pancreatic carcinoma with suspected autoimmune pancreatitis

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Abstract

We present a case of pancreatic carcinoma with strongly suspected coexisting autoimmune pancreatitis (AIP). The patient presented with a chief complaint of icterus and weight loss, and was referred to our institution after a pancreatic lesion was found. Blood test showed elevation of serum bilirubin, hepato-biliary enzyme, glucose and tumor markers, and also high levels of serum IgG4 (344 mg/dl, normal 4.8–105 mg/dl) and anti-DNA antibody (14 IU/ml, normal <6.0 IU/ml). Ultrasonography demonstrated an enlarged pancreas with smooth borders and low internal echo density. Enhanced computed tomography (CT) showed a sausage-shaped pancreas without definitive metastasis to the surrounding lymph nodes and liver. Imaging of the pancreatic duct, including endoscopic retrograde pancreatography (ERP) and magnetic resonance cholangiopancreatography (MRCP), showed stenosis of the main pancreatic duct at the pancreatic head as well as a long segment of narrowing at the body and no dilatation at the tail. Tissues from these stenotic sites and open biopsy from pancreatic body showed infiltrating adenocarcinoma and dense fibrosis. To date, only a small number of reports have described pancreatic carcinoma accompanied with AIP. It is important to confirm diagnosis with histology in cases of suspicious autoimmune pancreatitis, even when the clinical images are compatible with AIP.

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Acknowledgments

The authors thank Dr. Ralph H. Hruban of Johns Hopkins Medical Institutions in the USA for his assistance with reviewing the English of the manuscript and providing beneficial comments.

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Correspondence to Hiroyuki Matsubayashi.

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Matsubayashi, H., Matsunaga, K., Uesaka, K. et al. A case of pancreatic carcinoma with suspected autoimmune pancreatitis. Clin J Gastroenterol 2, 59–63 (2009). https://doi.org/10.1007/s12328-008-0045-9

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  • DOI: https://doi.org/10.1007/s12328-008-0045-9

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