QuestionSBA
QuestionChoice
A positive posterior drawer test indicates posterior cruciate ligament (PCL) rupture which is not part of the unhappy triad of O'Donoghue. The PCL spans from the posterior intercondylar area to the posterolateral aspect of the medial femoral condyle and stops the femur from slipping forwards on the tibia.
10001049
d
Positive posterior drawer test
QuestionChoice
Foot drop is the result of paralysis of the anterior compartment of the leg, and is most commonly due to common fibular nerve lesions. Although associated with trauma, it is not part of the unhappy triad of O'Donoghue.

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10001050
e
Foot drop
QuestionChoice
A positive anterior drawer test indicates an anterior cruciate ligament (ACL) rupture which is part of the unhappy triad of O'Donoghue, alongside a medial meniscus tear and medial collateral ligament tear. The ACL spans from the anterior intercondylar area to the posteromedial aspect of the lateral femoral condyle and stops the femur from slipping backwards on the tibia.
10001046
a
Positive anterior drawer test
QuestionChoice
This is McMurray's test for lateral meniscus tears. These tears are not part of the unhappy triad of O'Donoghue which consists of a medial meniscus tear, medial collateral ligament tear and anterior cruciate ligament (ACL) rupture.
10001047
b
Click and discomfort upon varus stress, internal rotation and extension of the knee
QuestionChoice
Tenderness over the lateral joint line is indicative of a lateral meniscus tear or lateral collateral ligament tear, neither of which are part of the unhappy triad of O'Donoghue. These tears would be produced upon varus stress to the leg such as when running and stopping suddenly by bracing against a planted foot with the foot internally rotated.
10001048
c
Tenderness over the lateral joint line
Concept
Chapter
2693
3873
Cruciate ligament injuries
Topic
145
Orthopaedics
12756
The unhappy triad of O'Donoghue occurs upon valgus (inward) stress on the knees. It most commonly occurs when the foot is planted on the ground.

Which of the following describes one of the findings upon examination?
a