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A dislocation of the kneecap occurs when the patella comes completely out of its groove on the end of the thigh bone (femur), and comes to rest on the outside of the knee joint. Kneecap dislocations usually occur as a significant injury the first time the injury occurs, but the kneecap may dislocate much more easily thereafter.
Chondromalacia patellae is a term used to describe the damage or softening of the cartilage on the underside of the kneecap. It is similar to patellofemoral pain syndrome (runner's knee) in which the pain is felt under and around the kneecap. This condition is common among young athletics but may also occur in older adults who have arthritis of the knee.
Hip bursitis is a common problem that causes pain over the outside of the upper thigh and hip joint. A bursa is a fluid-filled sac that allows smooth motion between two surfaces.
The quadriceps tendon is a thick, strong tendon that can withstand tremendous force. In daily life, it acts as part of the extensor mechanism to straighten the knee. People who injure the extensor mechanism may tear the quad tendon, tear the patellar tendon, or fracture the kneecap. All of these injuries have similar treatments and rehabilitation plans.
Subchondral insufficiency fractures of the femoral head (SIFFH) are a cause of femoral head collapse leading to degenerative hip disease. SIFFH is often mistaken for osteonecrosis given similar clinical and radiographic features. These similarities often lead to missed or delayed diagnosis which can often delay or change management. The purpose of this article is to systematically review the spectrum of demographics, diagnostic and treatment options, including hip preservation in young patient populations.