Data Trace Editor Discussion rare, slow growing tumor arising from remnants of the notochord in axial skeleton of middle aged adults; most occur in midline at base of skull and in the sacrococcygeal area (it is the most common primary bone tumor of the sacrum); classically a slow growing lytic, anterior scaral (50%), or cervical lesion in 35%; … Read more
– See: – Syme’s Amputation – Transmetatarsal Amputation – Discussion: – Francis Chopart first described disarticulation thru midtarsal joint; – Chopart amputation removes the forefoot and midfoot, saving talus and calcaneus; – Chopart amptutations should not performed for ischemia; – this … 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: – locally painfull benign cartilaginous lesion of bone; – it occurrs in adolescents; – located in metaphyses of major long bones; – this lesion most often presents as an active stage 2 lesion which is locally destructive & has a high recurrance rate (up to … Read more
– See: Patella and Patellofemoral Function – Discussion: – chondromalacia describes softening & fissuring of articular hyaline cartilage; – chondromalacia may result from an excessive load on patellofemoral joint, but disuse may be a contributing factor; – most common in yound women; – relationship between chondrosis & … 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
– 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: – two major glycosaminoglycans w/ in cartilage ground substance consist of chondroitin sulfate and keratan sulfate; – both of these substances are covalently attached to the core protein of proteoglycan; – their concentration and distribution w/ in matrix vary considerably according to age, type of cartilage, & … Read more
– Discussion: – rare disorder characterized by short limb dwarfism, polydactyly, dysplasia of the fingernails and toenails, dental deficiencies, & congenital heart disease; – common in the Amish; – short limb disproportionate dwarves are characterized by acromesomelia, w/ the forearms, hands, legs, and feet involved to a greater extent than … 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