30th April 2024

A 55-year-old man presents with a 6-month history of sudden, severe, stabbing pain in the right side of his face, triggered by chewing and sometimes even by touching the face.

A 55-year-old man presents with a 6-month history of sudden, severe, stabbing pain in the right side of his face, triggered by chewing and sometimes even by touching the face. The pain episodes last for a few seconds to 2 minutes. He has no history of neurological disorders. Physical examination is unremarkable, except for wincing pain upon palpation over the right mandibular region.

Which investigation is most likely to confirm the diagnosis?