Mr Briggs is a 42 year old male who reports several episodes of pain under his tongue. Pain is usually triggered by eating and lasts for 60 – 90minutes. He denies any swelling, lumps or halitosis and does not have any systemic symptoms. Mr Briggs informs you that his last episode was a few hours ago and the pain was unbearable. He is otherwise fit and well and does not smoke or drink alcohol. On examination, there is no obvious facial swelling or asymmetry and he has good dentition. On tongue elevation you see a firm white mass (0.7cm diameter) that is protruding from the base of the mouth. It is tender to palpation and you are unable to massage it free.
What is the most suitable next step?