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Positive J-Sign - Maltracking Patella on Knee Examination The J sign correlates with poor patellar tracking and potential instability. The patella takes a J shaped path with flexion and extension. Dr. Francisco Lara Pulido @trauma_modern #Maltracking #Positive #JSign #J #Sign #Knee #PhysicalExam #Patella #clinical #video #msk #orthopedics