This book provides up-to-date information on all aspects of autoimmune pancreatitis, a unique form of pancreatitis characterized clinically by frequent presentation with obstructive jaundice and dramatic response to steroids, histologically by a lymphoplasmacytic infiltrate with fibrosis, and radiologically by pancreatic enlargement. Current concepts regarding the disease and its classification into subtypes 1 and 2 are explained, and clinical, serological, and histopathological findings are carefully described. Imaging features on all the relevant modalities are illustrated, covering both the pancreas and other involved organs.