cysts of he salivary glands are very rare and non-neoplastic, localized lesions of the duct system. There are three types. Namely, dysgenetic cyst, secondary acquired cyst lined by epithelium (duct cyst, lymphoepithelial cyst, and retention
mucocele),
and pseudocyst without an epithelial lining(extravasation mucocele). The non-neoplastic cysts and pseudocysts form abut 6% of lesions of the salivary glands.
Among the limited number of cystic submandibular gland neoplasms reported in the literature, there have been few reports, to our knowledge, of a similar cystic lesion.
Recently the authors experienced an unusual case of huge extravasation mucocele arising from the submandibular gland. Surgically the mucocele was completely removed.
Histopathologically the final diagnosis was confirmed as extravasation mucocele.
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