Clinical and Imaging Features of Autoimmune Pancreatitis With Focal Pancreatic Swelling Or Mass Formation: Comparison With So-Called Tumor-Forming Pancreatitis and Pancreatic Carcinoma

Focal AIP is associated with clinical and radiologic features that are different from those of alcohol-induced TFP. In TFP there are two causative factors, namely, AIP and alcohol-induced chronic pancreatitis. Differential diagnosis of focal AIP from Pca seems to be possible in many cases by evaluating imaging findings such as dynamic CT and ERCP, although focal AIP sometimes shows clinical and radiologic features similar to those of Pca.