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Close correlation between chronic sclerosing sialadenitis and immunoglobulin G4
T Kamisawa1, H Nakajima, T Hishima
1Department of Internal Medicine, Tokyo Metropolitan Komagome Hospital, Tokyo, Japan. kamisawa@cick.jp
Internal Medicine Journal
|July 27, 2006
Summary
In patients with chronic sclerosing sialadenitis, elevated immunoglobulin G4 (IgG4) levels and IgG4-positive cells in salivary glands were observed. This suggests a link between sialadenitis and autoimmune pancreatitis, with IgG4 measurement aiding diagnosis.
Area of Science:
- Immunology
- Pathology
- Gastroenterology
Background:
- Chronic sclerosing sialadenitis is a condition affecting salivary glands.
- Immunoglobulin G4-related disease (IgG4-RD) is a systemic fibroinflammatory condition.
Observation:
- Four patients with chronic sclerosing sialadenitis presented with markedly increased serum immunoglobulin G4 (IgG4) concentrations.
- Abundant infiltration of IgG4-positive plasma cells was found in the salivary glands of these patients.
Findings:
- Autoimmune pancreatitis developed in two of the four patients during follow-up.
- Chronic sclerosing sialadenitis and autoimmune pancreatitis share similar pathophysiological mechanisms, linked by IgG4.
- Serum IgG4 measurement is a valuable tool to differentiate chronic sclerosing sialadenitis from salivary gland neoplasms.
Implications:
- This study highlights the potential of IgG4 as a diagnostic marker for chronic sclerosing sialadenitis.
- Understanding the shared mechanisms between these conditions may lead to novel therapeutic strategies.
- Further research into IgG4-related sialadenitis and pancreatitis is warranted.
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