<prompt> Plunging ranula is ?Cystic growth of sublingual glandLymph nodeA tumor in floor of mouthNone  <response>: Plunging ranula: Extravasation cyst of sublingual salivary gland Cause: trauma or obstruction of ductglandular tissue The cyts plunges into the submandibular region by dissecting between the fascial planes and the fllor mouth mylohoid 