Knee - Meniscus

Question 1

Normal medial meniscal anatomy?

Answer 1

-Horns both triangular
-Sharp points
-Posterior always larger than anterior
Any change = abnormal

Question 2

Where does posterior root of medial meniscus arise?

Answer 2

Immediately anterior to PCL.

Question 3

Posterior medial meniscal root missing on sagittal images?

Answer 3

Meniscal root tear

Question 4

Where does the anterior horn of medial meniscus insert?

Answer 4

1. Tibia

2. From medial to lateral to connect to to anterior horn of lateral meniscus (intermeniscal lig)

Question 5

Anatomy of lateral meniscus?

Answer 5

• Post horn higher than ant but about the same size

- Post inserts over tibial spine near PCL

Question 6

criteria for meniscal tears?

Answer 6

1. Abnormal shape of meniscus

2. High signal intensity unequivocally contacting surface (on PD)

Question 7

Shapes of meniscal tears?

Answer 7

1. Longitudinal
2. Horizontal
3. Radial

Question 8

Types of displaced meniscal tears?

Answer 8

1. Bucket handle (displaced longitudinal tear)
2. Flap tear (displaced horizontal tear)
3. Parrot beak (displaced radial tear)