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H and E stain of chronic sclerosing sialadenitis

H and E stain of chronic sclerosing sialadenitis
Chronic sclerosing sialadenitis (Küttner tumor). This IgG4-related disease shows large germinal centers (arrow), dense lymphoplasmacytic inflammation, and fibrosis. The cellular fibroinflammatory stroma is typical of this disease (arrowhead) (H&E stain).
IgG4: immunoglobulin G4; H&E: hematoxylin and eosin.
Reproduced with permission from: Geyer J, Deshpande V. IgG4-associated sialadenitis. Curr Opinion Rheum 2011; 23:95. Copyright © 2011 Lippincott Williams & Wilkins.
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