Fig 3. Case 2. A 24-year-old man with tender swelling in the right submandibular area shows marked shrinkage after 2 OK-432 injections.

A, Contrast-enhanced CT scan shows a plunging ranula in the right submandibular space (arrows).

B, Contrast-enhanced CT scan obtained 2 months after the first sclerotherapy shows near total shrinkage of the plunging ranula (arrow), but the 3-month follow-up sonogram showed enlargement of the cyst.

C, Unenhanced CT scan obtained 3 years after the second injection shows marked shrinkage of the cyst (which was larger than after first injection) (arrow).