Spine
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Immunohistochemical analysis of type IX collagen in disc tissue from spinal fusion patients. ⋯ During growth and maturation of the disc, collagen IX is presumably removed completely during matrix remodeling so that the protein is absent from normal adult annulus and nucleus but can reappear at sites of degeneration presumably as part of a repair response to mechanical injury.
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A descriptive CT study of lumbar facet joint (FJ) arthrosis in general and spinal stenosis populations. ⋯ FJ arthrosis is an age-dependent and BMI and sex independent phenomenon. In the general population, the prevalence of FJ arthrosis increases cephalocaudally with the highest frequency at L5-S1. In the stenotic group, the highest frequency was observed at the two caudal levels; L4-L5 and L5-S1. The prevalence of FJ arthrosis was greater for the right side.
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A restrospective review of 81 cases of osteoid osteoma of the mobile spine submitted to surgical treatment. ⋯ Conventional excision therapy is a effective and reliable treatment for osteoid osteoma associated to low morbidity and low local recurrence rate. Minimally invasive surgery is emerging as an alternative method, reducing soft tissue trauma and the collateral damage caused by traditional surgical approach, allow patients a more rapid and complete return to normal function.
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Retrospective case series of five consecutive patients. ⋯ En bloc excision of chordoma, whether wide or marginal, is the most ideal for treatment to prolong disease-free survival. En bloc excisions of chordomas in the cervical spine are technically complex procedures but can be performed with acceptable safety and perioperative morbidity.
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Both forelimbs of rats were amputated and these rats were kept in the custom-made cages to keep prolonged and repeated upright posture. Changes of bone were observed in the lumbar vertebrae at three different time points after the surgery. ⋯ Prolonged upright posture induces cartilage end plate calcification and hypertrophy in rat lumbar spine.