World Neurosurg
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Intramedullary schwannoma is a relatively rare tumor with only a few literature reports. This study was aimed to report the clinical characteristics of intramedullary schwannoma and discuss imaging findings and treatment strategies. ⋯ This article presented a series of 11 cases of intramedullary schwannoma with sharp margins and well-enhanced features. Prognosis and functional recovery were good after gross total resection.
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Comparative Study
Syringo-subarachnoid shunt with direct tube versus T-tube via the dorsal root entry zone approach for eccentric syringomyelia.
This study compared the clinical therapeutic efficacy of syringo-subarachnoid shunt placement with direct tube and T-tube via the dorsal root entry zone (DREZ) approach for treatment of eccentric syringomyelia. ⋯ Syringo-subarachnoid shunt placement with direct tube via the DREZ approach for treatment of eccentric syringomyelia is safer than with T-tube via the DREZ approach due to smaller incision length and less of a space-occupying effect with same therapeutic efficacy.
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To investigate the influence of sacroiliac interosseous ligament tension and laxity on the biomechanics of the lumbar spine. ⋯ While sacroiliac interosseous ligament laxity and tension have little effect on disc deformation and stress, and nucleus pulposus pressure, they reduce the stability of the lumbar-sacral vertebrae. In a forward flexion state, the lumbar ligaments bear a large load and are prone to laxity, thereby increasing the risk of lumbar injury.
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Based on the previously established 3-dimensional model, this study uses the finite element analytical method to observe the effects of superior articular process resection and intervertebral discectomy on the stress of the surgical segment under different motion states. ⋯ Select resection of the superior articular process base as much as possible to expose the target of the disc. And minimize annulus damage and disc removal.
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Long-segment instrumentation, such as Harrington rods, offloads vertebrae within the construct, which may result in significant stress shielding of the fused segments. The present study aimed to determine the effects of spinal fusion on bone density by measuring Hounsfield units (HUs) throughout the spine in patients with a history of Harrington rod fusion. ⋯ HUs were significantly decreased in the middle of previous long-segment fusion constructs, suggesting that multilevel fusion constructs lead to vertebral bone density loss within the construct, potentially from stress shielding.