Table 1: Clinic characteristics of AIP patients.

CaseSexAge (yr)Initial diagnosisDiagnostic criteriaInitial symptomsOperationSteroid therapyFollow-up months

1Male67Pancreatic head cancerJaundicePDYes*80
2Male51Lower common bile duct cancerJaundicePDNo60
3Male76Pancreatic head cancerRoutine checkupPDNo55
4Male58Pancreatic body cancerEpigastric discomfortDPYes 21
5Male58Pancreatic head cancerAbdominal painPDNo32
6Male64Suspected AIPJaundiceBiopsy, ID Yes50
7Male49Suspected AIPAbdominal painBiopsy, IDYes57
8Male 54Pancreatic head cancerRoutine checkupPDNo33

Note: PD: pancreaticoduodenectomy; DP: distal pancreatectomy; ID: internal drainage; meaning the patient meets the first Diagnostic Criteria for Autoimmune Pancreatitis from Mayo Clinic Center, that is, lymphoplasmacytic sclerosing pancreatitis or a large number of IgG4-positive cells (≥10 cells/high power field), depending on pathology assessment of resection specimens () or intraoperative frozen biopsy (); 60 days after operation; 7 months after operation.