– Discussion: – combination of genetic and environmental factors in its etiology; – an important early event may result from the interaction of antigen presenting macrophages w/ T cells (helper/inducer); – HLA-D allele DR4 is associated w/ RA patients; – although clinical laboratories measure IgM rheumatoid factor, … Read more
– History: 1963 – Maurizio described the association of patellar tendonitis with jumping 1973 – Blazina, et al. coined the term “jumper’s knee” 1978 – Mariani, et al. and Roels, et al. widened the term “jumper’s knee” to include pathology of the patellar tendon at the tibial tuberosity 1986 … Read more
– Discussion: – if patient is able to flex beyond 120 deg and if scar forms on quad tendon, this scar may be carried into notch of femoral component; – when the patient extends the knee (especially against resistance such as rising from a chair) the fibrotic nodule catches on the … Read more
– Discussion: – commonly presents in females over age 60 years of age; – pain may or may not be associated w/ acute injury and may be worse at night; – these lesions often show articular degenerative changes, especially when lesions are large or when there is pre-existing varus … Read more
– See: Bone Tumor Menu – Discussion: – benign osseous tumor usually less than 1.5 cm in diameter, comprising 11% of all benign bone tumors; – no cases of malignant transformation has been reported; – occurs primarily in adolescents and less often in children; … Read more
– Discussion: – although a traumatic etiology is believed to play a major role in production of these lesions, idiopathic osteonecrosis may be another factor; – anterolateral lesions: – may result from impaction of talus on fibula as the dorsiflexed ankle is forced into inversion (see ankle sprain); – the vast majority are caused by trauma; … Read more
– See: Osteochondral Lesions of the Adult Knee – Discussion: – term OCD is a defect in the subchondral region with partial or compete separation of the bone fragment; – most often seen on the postero-lateral aspect of the medial femoral condyle (about 80% of cases), and less often seen in … Read more
– Discussion: – OCD is a localized fragmentation of the bone and overlying cartilage of the capitellum; – it frequently progresses to loose body formation, and sometimes progresses to posttraumatic arthritis; – laxity of the MCL may accentuate the loading on the capitellum; – … Read more
– See: – Diff Dx: Posterior Ankle Pain – Fractures of Posterior Talar Process – Discussion: – accessory bone found just posterior to talus (accessory ossification center of the posterior process of the talus); – it may be considered a non united portion of the lateral tubercle; … Read more
Pagets Disease Panner’s Disease Parathyroid hormone Parsonage-Turner Syndrome Paronychia: Parosteal Osteosarcoma Patella / Patello-Femoral Function … Read more