A ranula is a mucous retention cyst, commonly associated with the duct of the sublingual or submaxillary (as in this case) gland. It may result from a sialolith obstructing the duct. It presents as a soft swelling of the floor of the mouth and contains viscous mucinous material. Mucous retention cysts of the minor salivary glands are much more common than those associated with a major gland duct. It must be differentiated from cellulitis of the submandibular gland (Ludwig's angina). If the etiology of a ranula is stone, removal of the stone may result in resolution. If not, excision with restoration of mucosal continuity is the treatment for a localized process. Associated inflammation may necessitate removal of the entire gland.
Swellings of the oral cavity.
Van Dis ML - Dermatol Clin - 1996 Apr; 14(2): 355-70
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