Diving ranula (through dehiscence)

Case contributed by A.Prof Frank Gaillard

Cystic lesion in sublingual space plunging into the submandibular space.

Small extension into the sublingual space is the key to raise possibility of diving ranula.

Case Discussion

CT of the floor of mouth in a patient with a left sided swelling demonstrates a large rounded water density cystic mass located inferior to mylohyoid muscle

Anteriorly a small extension of the cyst can be traced through the muscle fibres into the sublingual space.

Features are consistent with a diving ranula.

Final Diagnosis: 

Left submandibular gland excision:

  • A. Benign granulation tissue and sinus tract with abundant macrophages
  • B. Features are consistent with, but not diagnostic of, a plunging ranula
  • C. Benign lymph node
  • D. Unremarkable submandibular gland
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Case information

rID: 5414
Case created: 19th Jan 2009
Last edited: 10th Nov 2015
System: Head & Neck
Inclusion in quiz mode: Included

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