Chronic sialadenitis
· Usually a complication of duct obstrution
· Usually unilateral and asympomaic or with intermittant painful swelling of the gland
Pathology
· There are varying degrees of destruction of acini,duct dilatation,Chronic inflammatory cell infiltration predominantly lymphoplasmacytic
· Extensive interstitial fibrosis and squamous cell metaplasia in duct epithelium
· Calculus formation may be seen in dilated ducts
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