Radiologia Brasileira. Print version ISSN equina: review of the literature. Raízes nervosas redundantes da cauda equina: revisão da literatura. Imagenologia en Equinos. Public. · Hosted by Can-Horse Asesoria Veterinaria y etológica. Interested. clock. Mar 18, at AM – Mar 19, at PM. Dec 3, at AM – Dec 4, at PM UTC More than a year ago. pin. CESPO. Avenida Boyacá No A – 55, Bogotá, Colombia. Show Map.
|Published (Last):||10 June 2007|
|PDF File Size:||2.39 Mb|
|ePub File Size:||16.66 Mb|
|Price:||Free* [*Free Regsitration Required]|
The present study authors did not find any other study investigating such type of imaging finding in relation to postsurgical outcomes. How to cite this equinw. A radicular syndrome from developmental narrowing of the lumbar vertebral canal. The “redundant” or “knotted” nerve root: The authors standardized the measurement of the relative length of the nerve roots on the most central sagittal image of the lumbar column.
The redundant nerve root syndrome of the cauda imagenolofia. The clinical condition of patients with RNR of the cauda equina is related to the natural history of the lumbar spinal canal stenosis.
Curso de Imagenología en Equinos Atletas
The study authors imageologia suggested that such results reflected the reduction and degeneration of the nerve fibers 8. Statistically significant difference in relation to clinical symptoms was found between groups A and C.
The authors standardized the measurement of the relative length of the nerve roots on the most central sagittal image of the lumbar column. Then, the same imafenologia speculated that the redundancy would have been underestimated at MRI in the less severe cases, where the redundancy was only demonstrated at imagsnologia, probably because of the fact that, at MRI, the lumbar spine image acquisition is routinely performed with the patient in a neutral positioning, while the myelography study was performed with dynamic evaluation in the orthostatic position.
Redundant nerve roots of the cauda equina: review of the literature
Myelographic block caused by redundant lumbar nerve root. J Bone Joint Surg Br. Low degree of nerve cells loss and spinal ganglion fibrosis were observed, but such changes were equally present in non-redundant roots and were, therefore, considered as changes related to aging.
The relative length was obtained by measuring the distance from the maximum stenosis level to the most distant point where the presence of redundant roots could be identified, and by dividing such obtained value by the height of the vertebral body located above the stenosis level.
The greater the relative length, the better the postoperative outcomes, a result that, at a first analysis, seems to be unexpected, leading the study authors to raise the hypothesis that such result was related to a greater accommodation capability of the longer redundant roots during flexion and extension of the spinal column, as related to effects of traction forces One believes that chronic lumbar stenosis is the primary cause of symptoms.
Imagenologia en Equinos
Some investigations suggest that such abnormalities of the nerve roots are irreversible, and, therefore, the neurological symptoms are not susceptible to improvement after surgical decompression 8,9. Surgically confirmed spinal arteriovenous fistula.
The literature is controversial on the clinical relevance of the presence of redundant roots of the cauda equina. At MRI, the main differential diagnosis must be done with dural arteriovenous malformations or arteriovenous fistulas. Arch Phys Med Rehabil.
Also, there are reports on the indication of duroplasty in association with decompressive laminectomy was indicated for the relief of nerve root compression 11, Serpiginous filling defects may also be identified by myelography in the presence of dural or intradural arteriovenous malformations 17thus constituting an important differential diagnosis.
Serpentine cauda equina nerve roots. In the literature, signal intensity abnormalities nerve roots have not been reported in association with RNR of the cauda equina.
Such report has documented preoperative partial denervation of the left medial segment of the gastrocnemius muscle and, in spite of the significant pain relief experienced by the patient after laminectomy, electromyographic changes in the gastrocnemius muscle were still present over the three-month and six-month follow-up. Redundant lumbar nerve root syndrome: The recognition of redundant nerve roots at magnetic resonance imaging is important, imagenolohia to avoid misdiagnosing other conditions such as intradural arteriovenous malformations.
Radiologia Brasileira – Raízes nervosas redundantes da cauda equina: revisão da literatura
Elongated and tortuous dquina roots of the cauda equina can be identified arrow. The present paper is aimed at reviewing the histopathological, electrophysiological and imaging findings, particularly at magnetic resonance imaging, as well as the clinical meaning of this entity.
Suggested pathological basis of “redundant nerve root syndrome” of the cauda equina. The opening of the dura mater may be performed to rule out the hypothesis of arteriovenous malformation 7 or simply because surgeons have decided that such a procedure should be a part of the decompression 6, The literature is controversial about the implication of the presence of RNR in the indication for decompressive surgery for spinal canal stenosis.
Redundant nerve roots of the cauda equina: All the patients in that study were preoperatively submitted to myelography and MRI, and for the purpose of statistical analysis, the patients ikagenologia divided into three groups, as follows: