Osteochondritis Dissecans Flashcards
1
Q
what is osteochondritis dissecans (OCD)?
A
pathological process affecting the subchondral bone (most often in the knee joint)
2
Q
who typically suffers from osteochondritis dissecans?
A
children and young adults
3
Q
what is the presentation of osteochondritis dissecans
A
- knee pain and swelling (typically after exercise)
- knee locking, catching and/or giving way
- ‘clunking’ when flexing or extending knee
4
Q
what anatomical structure is involved in osteochondritis dissecans if the patient experiences ‘clunking’ on flexing or extending their knee?
A
lateral femoral condyle
5
Q
what are the signs of osteochondritis dissecans?
A
- joint effusion
- tenderness on palpation of the articular cartilage of the medial femoral condyle, when the knee is flexed
- wilson’s sign
6
Q
what is wilson’s sign indicate?
A
medial condyle lesion
7
Q
what is wilson’s sign?
A
- with the knee at 90 degrees flexion and tibia internally rotated, the gradual extension of the joint leads to pain at about 30 degrees
- external rotation of the tibia at this point relieves the pain
8
Q
what investigations are done in osteochondritis dissecans?
A
- x-ray (AP, lateral and tunnel views)
- MRI
9
Q
what can be seen on x-ray in osteochondritis dissecans?
A
- subchondral crescent sign
- loose bodies
10
Q
how is osteochondritis dissecans managed?
A
- EARLY DIAGNOSIS
- orthopaedics
