30th April 2024

A 30-year-old man presents with a 2-week history of sharp pain during bowel movements and occasional bright red blood on the toilet paper.

A 30-year-old man presents with a 2-week history of sharp pain during bowel movements and occasional bright red blood on the toilet paper. He reports no abdominal pain, diarrhoea, or weight loss. His medical history is unremarkable. On examination, there is a small tear visible at the posterior midline of the anal margin. There are no signs of infection or significant swelling.

Which test would confirm the most likely diagnosis?