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©2013 UpToDate ® Print Email Autoimmune pancreatitis Low power view of a pancreas biopsy in a patient with autoimmune pancreatitis. The acinar parenchyma is atrophic and fibrotic and contains a lymphoplasmacytic infiltrate. Courtesy of Russell Dorer, MD.

©2013 UpToDate ® Print Email Autoimmune pancreatitis Low power view of a pancreas biopsy in a patient with autoimmune pancreatitis. The acinar parenchyma is atrophic and fibrotic and contains a lymphoplasmacytic infiltrate. Courtesy of Russell Dorer, MD. Autoimmune pancreatitis Low power view of a pancreas biopsy in a patient with autoimmune pancreatitis. Obliterative phlebitis is present focally (arrow). Courtesy of Russell Dorer, MD. Autoimmune pancreatitis High power view of a pancreas biopsy in a patient with autoimmune pancreatitis. Obliterative phlebitis is present focally (arrow). Courtesy of Russell Dorer, MD. Autoimmune pancreatitis Low power (40X) view of a pancreas biopsy in a patient with autoimmune pancreatitis showing a large pancreatic duct surrounded by a dense lymphoplasmacytic infiltrate. Courtesy of Russell Dorer, MD. Autoimmune pancreatitis High power (200x) view of a pancreas biopsy in a patients with autoimmune pancreatitis showing an infiltrate composed primarily of plasma cells admixed with lymphocytes. Courtesy of Russell Dorer, MD. Autoimmune pancreatitis Low power view of a pancreas biopsy in a patient with autoimmune pancreatitis. Obliterative phlebitis is present focally (arrow). Courtesy of Russell Dorer, MD. Autoimmune pancreatitis High power view of a pancreas biopsy in a patient with autoimmune pancreatitis. Obliterative phlebitis is present focally (arrow). Courtesy of Russell Dorer, MD. Autoimmune pancreatitis High power (200x) view of a pancreas biopsy in a patient with autoimmune pancreatitis showing a small pancreatic duct with a lymphoplasmacytic infiltrate. Courtesy of Russell Dorer, MD.