Osteochondritis dissecans - patella

Case contributed by Dr Henry Knipe

Presentation

Knee pain and swelling.

Patient Data

Age: 14 years
Gender: Male

Defect in the inferior patellar articular surface. Small joint effusion. No other abnormality. 

Large knee joint effusion.

Intra-articular chondral fragment the medial aspect of the suprapatellar recess. 

Large defect inferior patellar involving cartilage and subchondral bone plate with chondral edema and localized synovial thickening. 

Case Discussion

Stage IV osteochondritis dissecans of the patella, a less common location for osteochondritis dissecans of the knee

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