The initial CT prior to the surgery showed patellofemoral maltracking without dislocation Case Photo #2 , as well as lateral tilt to the patella with patellar articular surface irregularity Case Photo #1 , Case Photo #2 , Case Photo #3 . Dysplastic distal femoral trochlea and mild osteochondral irregularity of the lateral femoral condyle was revealed Case Photo #4 .
The motor nerve conduction study revealed prolonged distal latency for the right femoral nerve with normal amplitude. The sensory nerve conduction study revealed decrease amplitude, with normal peak latency for the right saphenous nerve.
The needle electromyography demonstrated that the right vastus lateralis, rectus femoris, and vastus medialis (Femoral N. L2, L3, L4) demonstrated decreased insertional activity, minimal to no recruitment, with vastus lateralis being most affected. There was electrodiagnostic evidence of a right demyelinating and axonal femoral neuropathy with the lesion at or distal to the right inguinal ligament.
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