RT Journal Article SR Electronic T1 Autoimmune pancreatitis with associated ulcerative colitis in a teenager JF BMJ Case Reports JO BMJ Case Reports FD BMJ Publishing Group Ltd SP e227888 DO 10.1136/bcr-2018-227888 VO 11 IS 1 A1 Carolina Isabel Gouveia A1 Laura Oliveira A1 António P Campos A1 José Cabral YR 2018 UL http://casereports.bmj.com/content/11/1/e227888.abstract AB Autoimmune pancreatitis (AIP) is a rare entity that is extremely uncommon in children. Its diagnosis is also a clinical challenge. This form of chronic pancreatitis often presents itself with obstructive jaundice and/or a pancreatic mass and it is sometimes misdiagnosed as pancreatic cancer. We describe the case of a 13-year-old boy with obstructive jaundice and a 4 cm mass in the head of the pancreas that was diagnosed as AIP with associated ulcerative colitis.