What stage of disease is this case?
In accordance with the osteochondritis dissecans surgical staging system - stage III.
Intraarticular fragment best seen on T1 sagittal images due to its calcification and also on axial plane.
Medial femoral condyle deformation with a cartilage interruption.
No evidence of ligamentous and/or meniscal injury.
Normal patella and trochlear anatomy. No evidence of trochlear dysplasia, patellar retinacula look unremarkable bilaterally.
Sesamoid bone posterior to the lateral femoral condyle - fabella.