QuestionSBA
QuestionChoice
Although patella fracture can be associated with complications of ligament damage, the findings in this situation are more likely to be due to anterior cruciate ligament rupture alone. Patella fractures commonly present with an inability to bend or straighten the knee, and it is unlikely that the patient would be able to walk.
10004508
c
Patella
QuestionChoice
Injury to the posterior cruciate ligament would result in a positive posterior drawer test, as the tibia would be able to be displaced too far posteriorly when the knee is flexed.
10004507
b
Posterior cruciate ligament
QuestionChoice
Although injury to the medial meniscus can often occur in conjunction with injury to the anterior cruciate ligament, the information given here does not suggest this as the most likely damaged structure. Injury to the medial meniscus would give severe pain upon medial rotation of the knee.
10004509
d
Medial meniscus
QuestionChoice
Injury to the patellar ligament would result in clinical findings including the inability to straight leg raise, movement of the patella proximally up the quadriceps and a loss of tendon tone. This results in the patient not being able to stand or walk, as the knee would buckle and give way.
10004510
e
Patellar ligament
QuestionChoice
This is the characteristic picture of injury to the anterior cruciate ligament. Rupture of this allows the tibia to be displaced too far anteriorly when the knee is flexed, resulting in a positive anterior drawer and Lachman’s tests.
10004506
a
Anterior cruciate ligament
Concept
Chapter
2693
3873
Cruciate ligament injuries
Topic
145
Orthopaedics
13448
A 26-year-old man presents to his GP with severe pain and swelling in his left knee after a skiing accident. He can still walk and bear weight upon his left knee, but reports that the joint feels ‘unstable’. Upon examination of his left knee, anterior drawer and Lachman’s tests are positive, but the posterior drawer test is negative.

Which structure is most likely to be injured in this patient?
a