The presence of pancreatic lesions in patients with autoimmune pancreatitis requires histological diagnosis (percutaneous or endoscopic biopsy) to exclude malignancy. A nonspecific histology after endoscopic or percutaneous biopsy of a pancreatic lesion may require surgical excision and definite histology.
Keywords: IgG4 autoimmune pancreatitis; pancreatic branch‐duct intraductal papillary mucinous neoplasm; pancreatic intraepithelial neoplasia; pancreatic worrisome features.
© 2020 The Authors. Clinical Case Reports published by John Wiley & Sons Ltd.