Osteochondritis dissecans (knee)
Follow-up x-ray of a known knee problem.
Loading Stack -
0 images remaining
There is flattening and irregularity of the weight-bearing surface of the lateral femoral condyle, consistent with osteochondritis dissecans of the knee. There is subchondral sclerosis, and a lucent area suggesting subchondral cyst formation. X-rays of the other knee (not shown) demonstrated similar changes.
Osteochondritis dissecans typically affects the lateral surface of the medial femoral condyle in adolescent males. The weight-bearing surfaces of the lateral femoral condyle, tibia or patella may also be involved. Spontaneous healing is usual unless there is an unstable fragment. Signs of instability include large size (>1cm), cyst-like lesions beneath a fragment, contrast beneath a fragment on contrast arthrography, and loose body. OCD may be bilateral in 20-25% of cases.
The differential diagnosis includes normal fusing apophysis (painless) or acute osteochondral fracture. In older patients there may be insufficiency fracture or spontaneous osteonecrosis of the knee (SONK).
3 article feature images from this case
29 public playlist includes this case
- 3rd year review
- BP III - Nutritional, metabolic, endocrine
- Bone Infections Mod 7
- Cases for report
- Rad 3 Final Material
- Infection/ Arthritides and Misc.
- Mod8 review
- Musculoesquelético - 1
- Viva - MSK #1
- VC PART II
- Exam cases
- DI 2201 Mod 7
- MI + MS
- IV Review
- MSK - Conditions
- MSK - Clinical Conditions - Knee
- trauma genou
- RAL-1003 B