Microscopic finding (HE stain, low-power view). A sialolith (–), with concentric laminations, is seen lodged inside a markedly dilated duct. There is pronounced chronic interstitial inflammation of salivary gland lobules (›) with lymphoid follicle formation (arrows). Intra and perilobular fibrosis are characteristic findings in chronic sclerosing sialadenitis. There is acinar atrophy and destruction with ductal dilatation (lower right).

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