The symptoms of chondromalacia of the tibial tuberosity are as follows: 1. Localized pain in the tibial tuberosity. In the early stages this pain tends to be predominantly vague, and as the inflammation increases, the pain can rapidly intensify and has a marked increase when the patient extends the knee joint.2. Swelling around the tibial tuberosity. In the early stages there may be diffuse swelling around the tibial tuberosity. However, as the inflammation progresses, the tibial tuberosity may rapidly become prominent, which means that the tibial tuberosity is very swollen, producing a high protrusion relative to the surrounding skin. In addition, if abnormal calcium deposits are produced in the tibial tuberosity, or even early ossification of cartilage in the tibial tuberosity, a very hard bony growth can be felt around the tibial tuberosity. 3. Restriction of movement. This is mainly because the patient is afraid to move because of the pain in the knee extension joint. 4. There may be muscle atrophy. Once this inflammation occurs, quadriceps muscle atrophy may occur over time.