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=Benign= | =Benign= | ||
General DDx: | |||
*Inflammation. | |||
*Neoplasm. | |||
*Ductal obstrution. | |||
==Chronic Sialadenitis== | |||
===General=== | |||
Etiology:<ref>URL: [http://emedicine.medscape.com/article/882358-overview http://emedicine.medscape.com/article/882358-overviewhttp://emedicine.medscape.com/article/882358-overview]. Accessed on: 10 January 2011.</ref> | |||
*Infection. | |||
*Autoimmune (e.g. Sjögren syndrome, [[systemic lupus erythematosus]]). | |||
*Other. | |||
===Microscopic=== | |||
Features: | |||
*Fibrosis. | |||
*Non-neoplastic mononuclear inflammatory infiltrate. | |||
Image: | |||
*[http://commons.wikimedia.org/wiki/File:Chronic_sialadenitis.jpg Chronic sialadenitis (WC)]. | |||
==Mucocele== | ==Mucocele== | ||
===Microscopic=== | |||
Features: | |||
*Mucous. | *Mucous. | ||
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==Basal cell adenoma== | ==Basal cell adenoma== | ||
===Microscopic=== | |||
Features: | |||
*Basophilic cells. | *Basophilic cells. | ||
*Nests. | *Nests. | ||
==Canalicular adenoma== | ==Canalicular adenoma== | ||
===Microscopic=== | |||
Features: | |||
*Channels. | *Channels. | ||
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==Sebaceous adenoma== | ==Sebaceous adenoma== | ||
Features: | |||
*Benign counterpart of ''sebaceous carcinoma''. | *Benign counterpart of ''sebaceous carcinoma''. | ||
==Oncocytoma== | ==Oncocytoma== | ||
Features: | |||
*Like [[oncocytoma]]s elsewhere. | *Like [[oncocytoma]]s elsewhere. | ||
**Eosinophilic cytoplasm (H&E) - due to increased number of mitochrondria. | **Eosinophilic cytoplasm (H&E) - due to increased number of mitochrondria. |
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