Softening of cartilage.

Softness of the articular cartilage, usually involving the patella.

A roughening of the cartilage surface. Best known for the roughening of the underside of the kneecap.

A gradual degeneration of the cartilage on the underside of the kneecap. This can cause pain with running, jumping, and climbing up and down stairs.

condition resulting from the wearing away of the back of the patella (kneecap)

Softening of the chondrol (cartilagenous surface of the inner side of the patella).

a serious knee injury in which there is disintegration of cartilage surfaces due to improper tracking of the kneecap. Symptoms start with deep knee pain and a crunching sensation during bending.

Aching pain behind the kneecap. Pain begins and progresses slowly. It appears in healthy, athletically active young people.

Roughening of the articular cartiladge on the underside of the patella (knee cap) which occurs with patellofemoral injuries.

Roughening of the articular cartilage. Best known for the roughening of the underside of the knee cap, which can occur in any knee cap injury.