This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Thigh, Knee,Leg,Foot & Ankle injuries, Subject name: Orthopaedics
"Double PCL" sign on MRI knee is seen in 
Select and explain. 
A. Lateral meniscus tear, B. Medial meniscus tear, C. PCL tear, D. ACL tear
B: Medial meniscus tear
Answer: B: Medial meniscus tear 
Explanation: The double PCL signal appears on sagittal MRI images of the knee when a bucket handle tear of medial meniscus flips so that comes to lie anteroinferior to the posterior cruciate ligament (PCL) mimicking a second smaller PCL. Identifying a double PCL sign is highly specific for the detection of displaced bucket-handle tears. Ref: Internet sources src=" alt="" width="200" height="142" />