Data Trace Editor 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; these lesions tend to … 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
– Discussion: – a developmental dysplasia of peripheral growth plate which forms a cartilage capped projection of bone found near metaphyses of long bones; – peripheral chondroblast grows outward from the metaphysis, acting as an ectopic growth plate, which ceases growth at skeletal maturation; … Read more
– See: Pediatric Elbow Injuries – Discussion: – a traction apophysisitis of the medial epicondyle which needs to be distinguished from avulsion frx of the medial epicondyle – the medial epicondyle is an apophysis which is connected to the MCL as well as being connected to the flexor-pronator mass; – both of these structures will … Read more
– See: – Osteoarthritis Menu: – predisposing conditions – pathology and histology – clinical features – Discussion: – biomechanical considerations: (see kinematics and anatomy of knee – thick cartilaginous surfaces of … Read more
SCFE Trauma Inflammatory arthritis Calcium Pyrophosphate Dihydrate Crystal Arthritis – these pts may have symptomatology at atypical sites of the hand such as the second and third MP joints; Osteonecrosis Intra-articular Steroids Hyperparathyroidism – it can cause subchondral bony erosions and collapse of the articular … Read more
– Bone Tumor Menu – Discussion: – unusual benign osseous tumor; – it resembles osteoid osteoma in some respects buts is larger ( >2 cm); – unlike osteoid osteoma: – occurs in older adolescents and young adults; – osteoblastoma … Read more
– Discussion: – see: osteocytes and osteoclasts – arise from marrow stroma cells, and are found on the surfaces where bone is being formed; – may require bone morphogenic proteins for induction into osteoblasts; – generally regarded as bone forming cells; – … Read more
– Discussion: – refers to partial avulsion of the tibial tuberosity (anterior surface of apophysis) which has no involvement of tibial physis; – usually occurs in late childhood or early adolescence; – more common in boys; – may represent an over use disease; – repetitive stress on tuberosity may cause partial avulsion; – a painful non … Read more