Autoimmune pancreatitis (AIP) is a rare autoimmune disorder where the body’s immune system attacks the pancreas with chronic inflammation. There are two types of AIP, type 1 and type 2. Type 1 affects multiple organs including the pancreas, bile ducts in the liver, salivary glands, kidneys, and lymph nodes. Type 2 usually just affects the pancreas but can also be associated with inflammatory bowel disease. Some of the symptoms include jaundice, pain in the upper abdomen and back, nausea, vomiting, dark urine, pale stools, and unexplained weight loss. There is no known cause for AIP.