Abstract
Ranula is a term to indicate rather roughly a mucous retention cyst occurring in the floor of mouth, which is caused by passing disorder of saliva in the submaxillary duct or sublingul one. The developmental mechanism of the most of ranula is known to be salivary extravasation from an injured duct, whose cause is most commonoly described as trauma, followed by inflammation, foreign body.
This report describes a case of ranula whose development should be concerned with sialolithiasis.
The patient, a 40-year-old man, visited us with a chief complaint of a swelling on left side of the floor of mouth. Radiographic examination revealed sialoliths in the left submaxillary duct and gland. The fenestration of ranula was carried out, the sialoliths were extirpated.
It should be thought, in this case, that saliva was extravasated into the connective tissue of the floor of mouth by the perforation of the submaxillary duct to which sialoliths were an injury.
