A plunging ranula is a relatively uncommon phenomenon, presenting as mucous extravasation from a sublingual gland into the cervical tissue spaces, with a pseudocyst that lacks an epithelial lining.

• 摘要颈部蛤蟆肿为临床上不常见的疾病，其成因是由于舌下腺黏液外渗入颈部间隙中，造成无上皮内衬的假性囊肿。