– See: Predisposing Conditions – OA of Hip: – pain on wt-bearing felt in the groin, buttock, or medial thigh; – trendelenburg gait will decrease mechanical stress on joint and thereby lessen pain (forces acting on hip joint); – pain during sleep results from loss of protective function of … Read more
– See: Extra-articular Manifestations – Discussion: – manifests itself in one of three typical forms: – acute hemarthrosis; – subacute hemarthropathy; – chronic hemarthropathy; – severity of hemophilia A depends upon level of factor VIII clotting activity; – severe deficiency: – factor VIII activity level of < 1%; – pt characteristically bleeds into joints or … Read more
– 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
– 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
– Discussion: – segmental defects: – segmental defects are repaired w/ structural grafts; – if sufficient bone is available from iliac crest & shaped to replace absent bone; – central (medial wall absent) – cavitary deficiencies … 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: – most common presentation is chronic slip (60 % of cases); – may cause pain refered to hip, distal medial thigh, or knee; – on exam, look for loss internal rotation, which may be manifested by observing the extended hip move into external rotation as hip is … 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
– Discussion: – pins penetration of joint is a leading cause of chondrolysis; – penetration by a single screw (which is immediately removed) has a low incidence of chondrolysis; – if chondrolysis or AVN develops, early osteoarthritis is more likely; – some pts w/ chondrolysis … Read more
– Discussion: – rapid, progressive loss of joint space on radiographs and associated loss of clinical hip motion; – pins penetration of joint is a leading cause of chondrolysis; – penetration by a single screw (which is immediately removed) has a low incidence of chondrolysis; – if chondrolysis or AVN … Read more