Knee Trauma

Question 1

Most common location of this injury is the lateral aspect of the medial femoral condyle. Common in physically active adolescents and young adults. Thought to be due to chronic injury

Answer 1

Osteochondritis Dissecans

Question 2

This term is often used interchangeably w/osteochondritis dissecans. MOI is shearing, rotary force. Hx of specific injury, pain, tenderness and effusion

Answer 2

Osteochondral fracture

Question 3

Avulsion fx of the lateral aspect of the proximal tibia at the TFL/capsular insertion site. Commonly associated w/meniscal and anterior crucial ligament tears (75% w/ACL tears)

Answer 3

Segond fracture

Question 4

A lateral femoral notch depth greater than ___mm is a reliable indirect radiographic sign of a torn ACL

Answer 4

1.5

Question 5

An “FBI Sign” stands for what?

Answer 5

Fat/Blood Interface

Question 6

This will indicate an intra-articular fracture (marrow fat leaks into the joint). A straight line will show on the cross table lateral view of the knee

Answer 6

FBI Sign

Question 7

T/F. In the FBI sign, blood sinks to the bottom and fat floats on top

Answer 7

True