Knee RMSK

Question 1

Two anterior bursae that don’t communicate with knee joint

Answer 1

Pes anserine and semimembarnosus tibial collateral ligament. bursa

Question 2

ACL and PCL location

Answer 2

within intercondylar notch from femur to proximal tibia (intraccapsular) extra synovial

Question 3

quadriceps fibers extending over patella are called

Answer 3

prepatellar quadriceps continuation

Question 4

reinforcement of medial patellar retinaculum

Answer 4

medial patellofemoral ligament ( medial tibia to adductor tubercle)

Question 5

Biceps femoris long head 2 parts

Answer 5

direct arm and anterior arm

Question 6

Insertion of Biceps femoris long head

Answer 6

direct arm- lateral fibula with LCL

anterior arm- anterior to fibula

Question 7

BIceps femoris short head 2 parts

Answer 7

direct arm and anterior arm-

Question 8

Insertion of biceps femoris short heads

Answer 8

direct arm- proximal fibula medial to long head .. anterior arm- inserts to proximal tibia

Question 9

Normal thickness of PCL

Answer 9

less than 1 cm. Abnormal if greater

Question 10

Criteria for MCL ligament injury

Answer 10

> 6mm thick at femoral, >3.6mm at tibial attachment

Question 11

appearance of grade 1 sprain of MCL

Answer 11

intact fibers, <5mm widening

Question 12

criteria for repair of posterolateral corner

Answer 12

lateral joint space >10.5mm

Question 13

when ACL is injured also look for what structure?

Answer 13

anterolateral ligament and check for AVULsion fracture of tibia (Segond Fracture)

Question 14

LCL insertion

Answer 14

with biceps femoris at lateral fibula

Question 15

Other causes of synovial hypertrophy

Answer 15

inflammation, chronic infection, RA, seronegative arthritis, crystal deposition, particle disease

Question 16

Localized nodular synovitis

Answer 16

hypoechoic, non-compressible with possible increased through transmission

Question 17

Most common site of tears for medial meniscus?

Answer 17

posterior horn

Question 18

Characteristics of parameniscal cysts

Answer 18

multilocular and non-compressible, at jointline at base of meniscus

Question 19

COmmon location of gout in the knee

Answer 19

popliteus, patellar tendon

Question 20

extrusion of anterior horn of lateral meniscus

Answer 20

can be normal variant

Question 21

What is a Pelligrini-Stieda lesion?

Answer 21

calcification/ossification at proximal part of MCL

Question 22

Signs of of posterolateral injury

Answer 22

LCL tear, abnormal widening of lateral joint space of >10.5mm

Question 23

Indirect sign of ACL tear

Answer 23

dynamic stress view - Identify abnormal anterior tibial translation

Question 24

What causes baker cyst at 50 yrs old

Answer 24

degenerative weakening of intervening capsule and increased intra-articular pressure and joint fluid

Question 25

Hypoechoic or anechoic fluid outside baker cyst indicates?

Answer 25

rupture