The goal of this observational, retrospective study is to learn about cancer risk in autoimmune pancreatitis (AIP) patients. The main questions it aims to answer are: * Do patients with AIP have higher incidence of cancer in comparison to general population? * What is the overall prevalence of cancer in AIP patients? * What are the characteristics of AIP patients associated with the incidence of cancer?
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Standardized incidence ratio (SIR) of first invasive cancer
Timeframe: up to 20 years