Presentation
A male patient with history of knee pain for 2 months.
Patient Data
Age: 20-25 years
Gender: Male
From the case:
Osteochondritis dissecans (knee)
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- Lateral femoral condyle anterior surface & inferolateral portion osteochondral ulcers .
- Two loose bodies are seen at the anterior tibiofemoral joint space ,with the largest measuring about 7 X 13 mm along its maximal craniocuadal & transverse diameters.
- Mild osteoarhteritic changes are seen with minimal marginal osteophytic lippings of the opposing tibial & femoral surfaces,sharp tibial spines & lateral femoral condyle pseuodocystic changes.
From the case:
Osteochondritis dissecans (knee)
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- Lateral femoral condyle anterior surface & inferolateral portion osteochondral ulcers are seen elciting low signal on T1 & T2 WI with high signal on STIR WIs.
- Two loose bodies are seen at the anterior tibiofemoral joint space ,with the largest measuring about 7 X 13 mm along its maximal craniocuadal & transverse diameters.They elicit low signal on T1 & T 2 WI.
- Mild osteoarhteritic changes are seen with minimal marginal osteophytic lippings of the opposing tibial & femoral surfaces,sharp tibial spines & lateral femoral condyle pseuodocystic changes.
- Normal MRI appearance of menisci, ACL, PCL, collateral and patellar retinacular ligaments as well as the quadriceps and infra patellar tendons.
- Intact peri-articular musculature with preserved intervening fat planes.
- Mild amount of intra-articular synovial effusion is noted, associated with localized synovial fluid collection in gastrocnemius/semimembranosus bursa.
Case Discussion
Osteochondritis of medial femoral condyle with displaced osteochondral fragment, subchondral pseudocyst formation & mild osteoarthritis (osteochondritis dissecans).
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