Patellofemoral pain syndrome also called runner’s knee refers to pain under and around your kneecap. Patellofemoral pain is seen in number of medical conditions such as anterior knee pain syndrome, patellofemoral malalignment, and chondromalacia patella that cause pain around the front of the knee. Patellofemoral pain is a common complaint among runners, jumpers, and other athletes such as skiers, cyclists, and soccer players and therefore is the common name, runner’s knee.
Patellofemoral pain can result from poor alignment of the kneecap, complete or partial dislocation, overuse, tight or weak thigh muscles, flat feet, direct trauma to the knee. Patellofemoral pain often comes from strained tendons and irritation or softening of the cartilage that lines the underside of the kneecap. Pain in the knee may be referred from other parts of the body, such as the back or hip.
The most common symptom include a dull aching pain underneath the kneecap while walking up or down stairs, squatting, kneeling down, and sitting with your knees bent for long period of time.
Pain usually occurs under or around the front of the kneecap (patella) where it attaches with the lower end of the thighbone (femur). The patella, also called kneecap, is a small flat triangular bone located at the front of the knee joint. The kneecap or patella is a sesamoid bone that is embedded in a tendon that connects the muscles of the thigh to the shin bone (tibia).The function of the patella is to protect the front part of the knee.
To diagnose patellofemoral pain, your doctor will ask about your symptoms, medical history, any sports participation, and activities that aggravate your knee pain. Your doctor will perform a physical examination of your knee. Diagnostic imaging tests such as X-rays, MRIs, and CT scans, and blood tests may be ordered to check if your pain is due to damage to the structure of the knee or because of the tissues that attach to it.
The first treatment step is to avoid activities such as running and jumping, that causes pain. Treatment options include both non surgical and surgical methods. Non surgical treatment consists of rest, ice, compression, and elevation (RICE protocol); all assist in controlling pain and swelling. Non steroidal anti-inflammatory medications may be prescribed to reduce pain.
Your doctor may recommend exercise program to improve the flexibility and strength of thigh muscles. Cross-training exercises to stretch the lower extremities may also be recommended by your doctor.
Other non surgical treatments include:
In some cases, you may need surgery that includes arthroscopy and realignment. During arthroscopy damaged fragments are removed from the kneecap, while realignment moves the kneecap back to its alignment, thus reducing the abnormal pressure on cartilage and supporting structures around the front of the knee.