PMC7077040_01
Left knee anteroposterior (AP) and lateral plain films demonstrating joint space narrowing with erosive features.
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fig1
Plain films of the left knee demonstrated joint space narrowing with erosive features on both sides of the joint (Figure 1).
Left knee coronal and sagittal computed tomography (CT) images demonstrating bony destruction of the distal femur and proximal tibia.
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fig2
Computed tomography (CT) scan of his left knee demonstrated bony destruction of both the distal femur and proximal tibia without evidence of malignancy (Figure 2).