European spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society
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Case Reports
C1 laminectomy for retro-odontoid pseudotumor without atlantoaxial subluxation: review of seven consecutive cases.
A retro-odontoid pseudotumor is usually a reactive fibrocartilaginous mass associated with atlantoaxial subluxation (AAS). However, a retro-odontoid pseudotumor not associated with AAS, which undergoes spontaneous regression following C1 laminoplasty, has been reported. The purpose of this study was to report surgical outcomes of C1 laminectomy for retro-odontoid pseudotumor without AAS. ⋯ Our study, assessing the outcome of C1 laminectomy for retro-odontoid pseudotumor, found neurological improvement in all cases. Since all pseudotumors were reduced and additional AAS was not observed, C1 laminectomy for retro-odontoid pseudotumor, in the absence of AAS, is recommended as a therapeutic strategy.
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Case Reports
Asymptomatic thoracic Pantopaque cyst mimicking an intradural extramedullary lipoma on MR images.
Oil-based contrast media such as Pantopaque have not used for imaging for several decades, but because these contrast media have an extremely low clearance rate, the remnant contrast media or residual sequelae of these materials may be encountered in the clinical field. ⋯ Intraspinal masses showing metal-like density in X-ray or computed tomography but in MRI showing only lipoma or cystic lesions, not metallic characteristics, the differential diagnosis should include iophendylate (Pantopaque) cyst. Oil-based contrast medium is believed to have the potential to make a syrinx formation via arachnoiditis, which can lead to severe neurologic deteriorations, so even if the patients do not represent with an acute neurologic deficit, surgical total removal of remnant material without leaking should be considered.
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Cauda equina syndrome (CES) is a rare complication of lumbar disk herniation. Although micturition, defecation and/or sexual function are by definition affected, little seems to be known about long-term outcome. Aim of this study is to review current literature on outcome of micturition, defecation and sexual function in CES due to lumbar disk herniation. ⋯ This review offers an insight into the extent of micturition dysfunction, defecation dysfunction and sexual dysfunction (SD) in CES after decompression. Our findings show that dysfunction is extremely common, even at long-term follow-up. A condition as invalidating as CES requires proper patient information and the outcomes presented here may help in providing those data. Bias in included studies, lack of universal definitions and incomplete follow-up results qualify these data as the best we momentarily have, but still subject to improvement. Since SD seems to be severely underreported, we recommend further research to explore the extent of this problem, as well as the use of questionnaires in future clinical (prospective) studies to accomplish a more patient-based approach.
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Klippel-Feil syndrome (KFS) is a congenital cervical vertebral union caused by a failure of segmentation during abnormal development and frequently accompanies conditions such as basicranial malformation, atlas assimilation, or dens malformation. Especially in basilar invagination (BI), which is a dislocation of the dens in an upper direction, compression of the spinomedullary junction from the ventral side results in paralysis, and treatment is required. ⋯ Reduction and internal fixation using instrumentation are effective techniques for KFS with BI; however, caution should be exercised because of the possibility of paralysis caused by intraoperative reduction.
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The aims of the present study were to compare the biomechanical effects on the adjacent segments after mono-segmental floating fusion with posterior semi-rigid or rigid stabilization, and to evaluate the effect of the amount of fusion mass on the biomechanical differences. ⋯ Posterior instrumentation with semi-rigid rods may lower the incidence of disk and facet degeneration in the upper adjacent segment compared to rigid rods. On the other hand, the possibility of facet degeneration will be similar for all instrumentation devices in the lower adjacent segment in the long-term. The stiffness difference between rigid and semi-rigid rods on the changes in the adjacent motion segments was more crucial than amount of fusion mass.