autoimmune pancreatitis

• related: GI

• pathophysiology: unclear

  • systemic fibroinflammatory disease

• sx:

  • painless jaundice
  • IgG4-related associations: sialadenitis, probable retroperitoneal fibrosis

• dx

  • imaging: sausage shaped pancreas
  • abundant IgG4-producing plasma cells seen on tissue biopsy

• treatment: prednisone