– See: Bone Tumor Menu – Discussion: – an osteochondroma that results from a dysplasia of peripheral growth plate; – as its name implies, multiple hereditary exostosis is an inherited condition which produces multiple exostoses; – occurs in 1 out of 50,000 people; – … Read more
Discussion multiple epiphyseal dysplasia (a common type of osteochondrodysplasia) is characterized by disturbance of normal ossification w/ in epiphysis; pathologic abnormality is a disturbance in enchondral ossification of epiphyses and physes; is inherited as an autosomal dominant trait with variable expressivity; disorder is manifested as multiple areas of abnormal growth and ossification of the epiphysis; … Read more
– Discussion: – are characterized by a defect in metabolism of one or more mucopolysaccharides, w/ resulting excessive accumulation of these substances in the extracellular spaces of the connective tissues; – this group of disorders is characterized by a deficiency of specific lysosomal enzymes required for degradation of glycosaminoglycans; … Read more
– Discussion: – multidirectional instability implies three-way subluxations or dislocations either anteriorly, posteriorly, or inferiorly; – these patients usually have no true Bankart lesion and incontrast patients have a capacious axillary pouch; – ref: The Effect of Variation in Definition on the Diagnosis of Multidirectional Instability of the Shoulder. – … Read more
ORIF of Calcaneal Frx Using Lateral Approach: – Preoperative Planning: – Surgical Stratedgy: – pt in true lateral position – J or L approach w/ subperiosteal dissection off lateral wall, including calcaneo-fibular ligament (sural nerve in flap); – extension from tuberosity to calcaneo-cuboid (watch peroneals) – reduction of critical angle of Gissane/ anterior process to … Read more
– Discussion: – used to evaluate capsule of shoulder, & glenoid labrum, subscapularis & long head of the biceps, and the humeral head; – glenoid labrum produces low signal intensity since it is made of fibrous tissue; – used for imaging SLAP and Barkart injury – Hill-Sachs … Read more
– Discussion: – useful in planning surgery & limb salvage procedures; – assists w/ preop planning for relationship of tumor to such adjacent normal structures as physes, joints, & N/V bundles; – Soft Tissue Tumors: – specificity of MRI is poor; – for planning limb salvage prosthesis, … Read more
– See: – MRI in Cervical Fractures – Role of CT & MRI in Cervical Fractures – MRI of Disc Herniation – MRI diagnosis of Spinal Osteomylitis – Discussion: – most sensitive and accurate method for screening patients with symptoms of a spinal cord lesion; – … Read more
– See: MRI of Spine – Discussion: – MRI is sensitive for detecting infection & is specific in differentiating infection from tumor; – infection: – T1 weighted images: – decreased signal intensity in vertebral bodies & disk w/ … Read more
– See: – MRI Spine: Discussion; – Role of CT in C-spine Injuries: – Discussion: – for visualizing soft tissue and neural elements, & unsuspected disc herniations in presence of cercial spine fractures; – disc herniation may indicate disruption of anterior or posterior longitudinal ligament; – MRI … Read more