Knee

Question 1

List common knee pathologies

Answer 1

• Most common are sports injuries / trauma
• Osteoarthritis (aka wear and tear, over ½ million total knee replacements are performed annually)
• Neoplasms – distal femur and proximal tibia – 11% of childhood cancers are bone cancer

Question 2

List order of diagnostic imaging choices for the knee

Answer 2

1. X-ray: fractures, dislocations, and articular changes
   (done NWB)
2. CT scan: complex fractures and articular defects (good to pick up bone fragments)
3. MRI: menisci, articular cartilage, and osteochondritis dissecans
4. Ultrasound: tendons and trauma with a foreign body
5. Bone scans: evaluation of neoplasms