Objective:

To report a case of autoimmune pancreatitis (AIP) that was initially misdiagnosed as pancreatic cancer due to similar imaging and serological findings.

Approach:

Key Findings:

• Serum IgG4 was markedly elevated at 10,022 μg/mL.
• Histopathological examination revealed benign ductal epithelium with low proliferative activity and no evidence of adenocarcinoma.
• Treatment with glucocorticoids resulted in normalization of serum IgG4 and CA19-9 levels.

Interpretation:

The case highlights the importance of including IgG4-related autoimmune pancreatitis in the differential diagnosis of pancreatic masses.

Limitations:

• The study is based on a single case report, which limits the generalizability of the findings.
• Long-term outcomes beyond one year are not discussed.

Conclusion:

This case emphasizes the need for a systematic diagnostic approach in patients with pancreatic masses to differentiate between autoimmune pancreatitis and pancreatic cancer.

Attribution Notice

This content is an AI-generated, fully rewritten summary based on a published scholarly article. It does not reproduce the original text and is not a substitute for the original publication. Readers are encouraged to consult the source for full context, data, and methodology.