The plunging ranula is thc rare mucocele that extends to the submandibular region.
A case of plunging ranula is presented. Thc patient is a 2-year-old male.
Though there are many treatment procedures for this disease, we extraded both the eyst wall and sublingual gland.
Two years after the operation, no special abnormality was recognized.
We considercd that the analysis of amylase activity in the eyst fluid is valuable for diagnosis, becausc it is higher than that of the serum.
