A case of primary pancreatic non-Hodgkin B-cell lymphoma mimicking autoimmune pancreatitis.

Non Hodgkin lymphoma frequently involves the gastrointestinal tract, in particular the stomach and the small bowel. Rarely, it can also be a cause of pancreatic masses. Clinical presentation is often non-specific and may overlap with other pancreatic conditions such as carcinoma, neuroendocrine tumours and autoimmune pancreatitis. We report a case of primary pancreatic lymphoma in a young woman with jaundice, fever and abdominal pain mimicking autoimmune pancreatitis. Clinical evaluation included the abdominal Computed Tomography scan, Magnetic Resonance Imaging and an upper gastrointestinal endoscopy that revealed a large duodenal mass. Endoscopic biopsies were performed and eventually histological examination was coherent with a diagnosis of primary pancreatic lymphoma.