– Discussion: – autosomal dominant proportionate dwarfism that affects bones formed intramembranously (eg. facial bones, cranium, & clavicles); – dislocations of hips, knees, and the radial heads may occur; – clavicle: – most commlonly, absence of the central portion of the clavicle with rudimentary … Read more
– Discussion: – classified according to both the mechanism of injury and morphology. – two major mechanisms of injury: – direct and indirect trauma; – Direction Trauma: – patella may be fractured by direct blow during fall onto knee or when it hits dashboard in an … Read more
– See: Unstable Intertrochanteric Fractures: – Type I: non displaced, stable intertrochanteric s comminution; – Type II: stable, minimally comminuted, but displaced frx – 36% of intertroch frx – Type III: has a large posteromedial comminuted area and are unstable; … Read more
– See: – Bone Tumor Menu and Osteosarcoma Demonstration Project – Discussion: – malignant tumor of bone in which neoplastic osteoid is produced by a proliferating spindle cell stroma; – most common primary malignant bone tumor of mesenchymal derivation; – arises in adolescents, and second or third decade; – … Read more
– See: – Total Hip Replacement Menu: – Acetabular Component Revision – Femoral Bone Grafting for THR – Frozen Allograft – Dysplastic Hip – Discussion: – in planning of acetabular reconstruction, major goal is to establish … Read more
– Discussion: – to understand functions of & reasons for haversian systems, one must consider manner in which diaphysis grows circumferentially; – since bone is hard substance, it can grow only by adding new material to its surface; – at birth, diaphyseal portion of human femur is tube about 6 mm … Read more
– See: Bone Tumor Menu – Discussion: – malignant cartilaginous tumor of bone (3rd most common malignant bone tumor / comprises 20% of malignant bone lesions); – it is less common and less aggressive than osteosarcoma; – staging: – histologic grading is best predictor of stage; – most often presents as … Read more
– See: Bone Tumor Menu – Discussion: – age at presentation: – most common primary epiphyseal tumor in children is chondroblastoma; – most commonly arises between ages 10 to 30; – not infrequently, the tumor will also arise … Read more
– Discussion: – comprises a group of disorders characterized by multiple punctate calcifications in infancy; – skeletal manifestations include: skin, facial, ocular, and cardiac abnormalities; – characteristic punctate calcifications are seen on x-ray at birth and usually disappear by one year of age; – Orthopaedic Manifestations: – … Read more
(See also: Acetabular Osteotomies) Discussion a acetabular osteotomy salvage procedure which is indicated in patients without a concentrically reducible hip; modified shelf osteotomy above acetabulum w/ medial displacement of acetabulum; distal fragment is displaced medially and upward as osteotomy hinges on the symphysis pubis; hip capsule is interposed between newly formed acetabular roof & femoral head; relies … Read more