Patellofemoral Syndrome
Pain around or behind the kneecap, often from maltracking or cartilage wear. Can occur alone or alongside knee osteoarthritis.
Extended Definition
Patellofemoral syndrome (PFS), also called “runner’s knee,” involves pain arising from the joint between the kneecap (patella) and thigh bone (femur). It may involve cartilage softening (chondromalacia) or tracking problems.
Symptoms
- Pain with stairs (especially descending)
- Pain with squatting or kneeling
- Pain after prolonged sitting
- Grinding or clicking sensations
- Swelling around the kneecap
Causes
- Maltracking - Patella doesn’t glide smoothly in its groove
- Muscle imbalance - Weak or tight quadriceps
- Overuse - Repetitive activities like running
- Cartilage wear - Early patellofemoral OA
Treatment
Conservative treatments include:
- Physical therapy (especially VMO strengthening)
- Patellar taping or bracing
- Activity modification
- HA injections (can improve overall knee lubrication)
Related Terms
More Conditions Terms
View allBilateral Arthritis
Arthritis affecting the same joint on both sides of the body, such as both knees or both hips. Common in osteoarthritis due to similar wear patterns.
Bone Spur
A smooth, bony growth that develops along the edges of bones, especially in joints affected by osteoarthritis. Also called an osteophyte.
Bone-on-Bone
A colloquial term describing advanced osteoarthritis where cartilage has worn away completely, allowing direct contact between bone surfaces. Often painful and may require surgery.
Chondromalacia
Softening and deterioration of cartilage, most commonly affecting the underside of the kneecap. Often considered an early stage of patellofemoral arthritis.
Crepitus
A crackling, popping, or grinding sensation or sound that occurs during joint movement, often felt or heard when bones with damaged cartilage rub together.