Knee

Question 1

AP View

Answer 1

joint space narrowing or calcification of cartilage

Question 2

Lateral View w/ partial flexion

Answer 2

patella and joint effusions

Question 3

Sunrise/Merchant view

Answer 3

patella to anterior femur

Question 4

Tunnel View

Answer 4

Tibial spines and femoral condyles

Question 5

MRI

Answer 5

ligaments, cartilage, tendons

• Soft tissue disorders
• Joint effusion is best on LATERAL view super to patella and anterior to femur

Question 6

Pittsburgh knee rules

Answer 6

• Blunt trauma or fall as mechanism of injury + either:
  o Age younger than 12 or older than 50
  o Inability to walk 4 WBing steps in emergency department

Question 7

Ottawa Knee rules

Answer 7

-	Order x rays if any of these are present 
o	Age 55 +
o	Isolated tenderness over the patella
o	Tenderness over the fibular head
o	Unable to flex > 90º
o	Unable to WB or ER cant do 4 steps

Question 8

Knee OA x ray

Answer 8

joint space narrowing, sclerosis, and osteophytes - Cartilage may become calcified and break off resulting in loose bodies in the joint

Question 9

Chondrocalcinosis

Answer 9

calcification of articular cartilage

Question 10

Segond fracture

Answer 10

• Cortical avulsion fx off proximal lateral tibia just distal to the tibial plateau at site of insertion of middle third of lateral LCL
• Excessive IR and Varus

Question 11

Osteochondritis dissecans

Answer 11

• Lesions w/ bone and cartilage
• 50% of loose bodies in the knee
• Multifactorial: traumatic, ischemic, abnormal ossification centers, genetic or combination
• More in men

Question 12

Osgood-Schlatter Disease

Answer 12

• Active boys and girls 11-15
• Growth spurts
• More in boys
• Sinding-Larsen-Johansson syndrome patella tendon and lower margin of patella, instead of upper margin of tibia