In two, the ranulas passed into the upper neck through the posterior border of the mylohyoid muscle, while in the other it passed into the upper neck through the dehiscence of the mylohyoid muscle.

• 要切除囊肿起源的舌下腺，及排空颈部的假性囊肿才能根治，但不需要做广泛性的颈部囊肿清除术。