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.