Definition of Chondromalacia patella:

Chondromalacia patella is the softening and degeneration of the tissue (cartilage) underneath the kneecap (patella).

Causes, incidence, and risk factors:

Chondromalacia patella that occurs in adolescents and young adults is thought to be related to overuse, injury, or too much force on the knee. It is more common in females. Many young people have a a slight problem with the position of the kneecap.

Chondromalacia patella may also be a sign of arthritis of the kneecap, which is usually seen in older individuals.

People who have previously had a dislocation, fracture, or other injury to the kneecap may be more likely to get chondromalacia.