PMC7364120_01
Whole leg radiographs before (a,b) and after (c,d) the first surgery.
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Radiographs showed medial joint space narrowing, a hip-knee-ankle angle of 10-degrees varus, medial proximal tibial angle of 82 degrees, and a PTS of 8 degrees (Fig. 1a and b). PTS was increased to 15 degrees (Fig. 1c and d), and magnetic resonance imaging showed anterior translation of the tibia (Fig. 2b).
Magnetic resonance imaging T1 sagittal view showed anterior cruciate ligament was diminished before the first surgery (a) and anterior translation of tibia after the first surgery (b).
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ACL was diminished (Fig. 2a). According to these findings, we diagnosed medial compartmental osteoarthritis of the knee.