Diving ranula - through dehiscence

Case contributed by A.Prof Frank Gaillard

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 fibers into the sublingual space.

Features are consistent with a diving ranula.

Annotated image

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

Case Discussion

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
Published: 19th Jan 2009
Last edited: 19th Nov 2019
System: Head & Neck
Inclusion in quiz mode: Included

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