QuestionSBA
QuestionChoice
This is incorrect, injuries to the lateral collateral ligament are typically seen following a blow to the lateral side of the knee in a planted foot. On examination, lateral rotation of the leg would elicit pain. MRI would show a tear to a ligament which attaches at the lateral epicondyle of the femur and lateral surface of the fibular head.
10025889
e
Lateral collateral ligament tear
QuestionChoice
This is correct. The patient demonstrates a typical ACL injury involving a twisting motion, a popping sensation and rapid swelling. Other indicators include a positive anterior draw test that is consistent with ACL weakness. The MRI also describes an ACL tear: it attaches to the anterior intercondylar region of the tibia and the intercondylar fossa of the femur.
10025885
a
Anterior cruciate ligament (ACL) tear
QuestionChoice
This is incorrect. The PCL is often injured following a direct blow to a flexed knee. This would show on examination as a positive posterior draw test. The PCL inserts at the posterior intercondylar region of the tibia and the anteromedial femoral condyle. These factors make an ACL tear more likely than a PCL tear in this case.
10025886
b
Posterior cruciate ligament (PCL) tear
QuestionChoice
This is incorrect. Injuries to the medial collateral ligament are typically seen following a blow to the medial side of the knee in a planted foot. On examination, medial rotation of the leg would elicit pain. MRI would show a tear to a ligament which attaches to the medial epicondyle of the femur and medial condyle of the tibia. It would also likely show a meniscal tear as these structures are closely related. An ACL tear is therefore a more likely underlying diagnosis.
10025888
d
Medial collateral ligament tear
QuestionChoice
This is incorrect. The patellar ligament is a continuation of the quadriceps femoris tendon and attaches to the tibial tuberosity. Injury to this ligament would present with a popping sensation and swelling, but examination would elicit an inability to straighten the knee. An ACL tear is therefore a more likely underlying diagnosis.
10025887
c
Patellar ligament tear
Concept
Chapter
2693
3873
Cruciate ligament injuries
Topic
145
Orthopaedics
17575
A 25 year old woman presents to A&E after sustaining a right knee injury whilst playing football. Her boot became stuck in the ground, causing her knee to twist. She reports a popping sensation, accompanied by sudden severe pain. On examination, there is significant swelling and tenderness in the right knee. The anterior draw test is positive.

An MRI shows a tear to the structure that attaches to the anterior intercondylar region of the tibia and the intercondylar fossa of the femur.

Which of the following is the most likely underlying diagnosis?
a