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Background and Objectives:The plunging ranula is a relatively uncommon phenomenon which represents a mucus escape reaction occuring from disruption of the sublingual salivary gland. We present a series of 22 patients treated at Korea University order to provide our experience for its corect diagnosis and treatment. Materials and Method:A retrospective review of 22 patients with this condition was undertaken. Information was collected on age, sex, history of onset, predisposing factors, treat-ent, post-operative follow-up and outcome of treatment. Results:The patients were all young adults with a median age of 19.8 years old. The sex distribution was male predominant with 15 men and 7 women. Except for one, no patients had any history of approach and one sclerotherapy. There were no recurrences. One patient experienced transient paralysis of the marginal mandibular branch of the facial nerve postoperatively, but it was temporal and was sustained with no further complications. Conclusion:The incidence of plunging ranulas was not comon. The precise etiology of its predisposition is unknown. Re-oval of the sublingual gland via either a cervical or intraoral approach is important in the management of this condition. (Korean J Otolaryngol 2003 ;46 :764-8)