15th September 2020

A 69-year-old man presents with a lump on his lip

A 69-year-old man presents with a lump on his lip. The lump is on the vermillion of his lower lip and is slightly darker in appearance than the surrounding skin. The lump is around 5 mm in diameter and firm to palpate. It is not causing the patient any pain but he is concerned as he has had the lump for nearly two months. He has smoked since his early 20s and generally smokes around 30 cigarettes a day. He is a regular drinker, consuming around 10 units in an average week, and retired from his job as a bank clerk 10 years ago. He has no other medical history of note, and cannot remember the last time he visited a dentist.

For the case above, please select the SINGLE most likely diagnosis. Select ONE option from the list below.