Image IQ: 16-Year-Old Presenting with Swelling Beneath the Tongue and Discomfort

Can you properly diagnose this 16-year-old?

16-year-old presenting with swelling beneath the tongue and discomfort.

CT scan of the neck shows a fluid density well defined thin-walled lesion at the floor of the mouth in the sublingual and submandibular space.

What is your diagnosis?