Mucocele: Retention and extravasation types

March 24, 2013
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Pathology Clinic

The extravasation type is the most common mucocele, more common in children and young adults, with a peak in the second decade of life.

The most common non-neoplastic lesion of salivary gland tissue is the mucocele (also called sialocele and ptyalocele). A mucocele is defined as the pooling of mucin in a cystic cavity. Two types of mucoceles are recognized: (1) the retention type, in which the mucin pooling is confined within a dilated excretory duct or cyst, and (2) the extravasation type, in which mucin is spilled into the connective tissues from a ruptured or traumatized salivary gland duct.

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