17th September 2020

A 23-year-old football player presents with acute right-sided knee pain

A 23-year-old football player presents with acute right-sided knee pain following a match. He describes a ‘pop’ sensation with sudden onset pain after being tackled by an opposing player. This is immediately followed by rapid onset of swelling of the joint. His observations are stable. You perform anterior drawer test, which reveals a lack of a firm endpoint compared to the contralateral limb.

Which of the following investigations is most likely to reveal the underlying diagnosis?

Select the SINGLE most appropriate option from the list below. Select ONE option only.