Behind-the-knee pain could be due to muscle strain or arthritis—or something far more serious. Orthopedic experts say these ...

Some of the most common symptoms of PFPS include ... and softening of the cartilage on the underside of the patella (kneecap). Pain occurs when the thigh bone and kneecap rub together.

In more extreme situations, a specific surgical procedure may be needed to help relieve the pain. If the cartilage under the soccer player's kneecap is fragmented and causing mechanical symptoms ...

The primary outcome was the Kujala score on pain and function at 5-year. Secondary outcomes were visual analogue scales (VASs) to assess activity-related symptoms. Results According to the Kujala ...