1992 年 1992 巻 Supplement57 号 p. 178-184
A 23 year old man with cystic hygroma of the left side parotid gland was treated surgically. Two years after operation, there was no evidence of recurrence. Because of its invasive nature, it is very difficult to separate the tumor from the facial nerve macroscopical-ly. In order to avoid unnecessary expenses in surgery use of a surgical microscope is recommended.