Organ Involvement
- Pancreas: autoimmune pancreatitis
- Bile ducts: IgG4-associated cholangitis
- Salivary gland
- Chronic sclerosing sialadenitis (Küttner's tumour)
- IgG4-related plasmacytic exocrinopathy (Mikulicz's disease)
- Chest
- Patchy ground-glass, nodular, and consolidative opacities
- Mediastinal fibrosis and adenopathy
- Retroperitoneum
- Chronic periaortitis
- Idiopathic retroperitoneal fibrosis
- Kidneys: tubulointerstitial nephritis
- Orbits: IgG4-associated pseudolymphoma
- Inflammatory bowel disease: ulcerative colitis
