In patellofemoral syndrome, the Q angle may be greater than how many degrees?

In patellofemoral syndrome, the Q angle, which is the angle formed between the line of pull of the quadriceps muscle and the line of the patellar tendon, can be greater than 18 degrees, indicating an altered biomechanics of the knee. A Q angle that exceeds this threshold can lead to abnormal tracking of the patella within the femoral groove, contributing to pain and dysfunction in the knee joint.

When the Q angle is increased, it places more lateral forces on the patella when the knee is in motion, resulting in potential misalignment and wear on the cartilage, ultimately leading to symptoms associated with patellofemoral syndrome. An understanding of this measurement is crucial for clinicians evaluating and treating knee issues, as an elevated Q angle may necessitate specific rehabilitation strategies to improve patellar tracking and address muscle imbalances.