Free practice question 14 of 20 · Knee
An original single best answer question in the style of the FRCS (Tr & Orth) Section 1 paper, with the answer and a referenced explanation. Pick an answer to reveal it, then rate how sure you were.
A 26-year-old netball player with an anterior cruciate ligament-deficient knee is examined under anaesthesia. With valgus and internal rotation applied, the lateral tibial plateau lies subluxed anteriorly in extension and reduces with a clunk at about 30° of flexion.
Which structure produces the reduction?
Topic guide
Knee: what the exam tests
Syllabus coverage, high-yield themes and the common traps.
Interactive 3D
Knee ligaments
The knee in flexion from the front with the anterior and posterior cruciate ligaments, the medial and lateral collateral ligaments and the menisci.
Interactive 3D
Tibial plateau & menisci
The tibial plateau from above with the medial and lateral menisci and the tibial attachments of the cruciate ligaments.
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