<prompt> The immunoglobulin level, which is specifically elevated in autoimmune pancreatitis is which of the following?IgMIgEIgG4IgG2  <response>: Serum IgG4 is elevated at least twofold higher than 135 mgdL in those with autoimmune pancreatitis. Reference: Harrisons Principles of Internal Medicine, 18th Edition, Page 2644 