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A healthy 11-year-old boy presented with subacute pain in the lateral side of the left knee after he fell off on his knee in external rotation (Figs. 1, 2, 3, 4, 5).
A Anteroposterior radiograph of the left knee. B Lateral radiograph of the left knee
Sunrise view of the knees
Sagittal US image of the left knee in color Doppler mode showing thickened lateral Retinaculum with hyperhemia in Doppler mode
Axial T1-weighted image of the left knee
A Axial fat-saturated proton-density weighted image of the left knee. B Coronal fat-saturated proton-density weighted image of the left knee
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The diagnosis can be found at https://doi.org/10.1007/s00256-022-04162-x
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Badi, FE., Simoni, P. Painful patellar swelling. Skeletal Radiol 52, 251–253 (2023). https://doi.org/10.1007/s00256-022-04163-w
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DOI: https://doi.org/10.1007/s00256-022-04163-w