RESUMO
BACKGROUND: Spinal intradural arachnoid cyst is a rare lesion, sometimes acquired. PURPOSE: To describe the appearance and later spontaneous disappearence of a lumbar intradural arachnoid cyst, following perineural corticoid injections. METHOD: Review of the clinical data and imaging, with final spontaneous return to initial state. DISCUSSION: Atypical intradural arachnoid cysts can be related to perineural injections and can cause symptoms of spinal stenosis. Its spontaneous vanishing is a very rare event, up to now unreported.
Assuntos
Corticosteroides/administração & dosagem , Cistos Aracnóideos/diagnóstico , Cistos Aracnóideos/etiologia , Injeções Espinhais/efeitos adversos , Região Lombossacral/patologia , Doenças da Medula Espinal/diagnóstico , Doenças da Medula Espinal/etiologia , Estenose Espinal/diagnóstico , Estenose Espinal/tratamento farmacológico , Idoso de 80 Anos ou mais , Feminino , Seguimentos , Humanos , Imageamento por Ressonância Magnética/métodos , Remissão Espontânea , Estenose Espinal/complicaçõesRESUMO
PURPOSE: To compare AP diameter measurements of spinal canal and thecal sac on MRI and CT. MATERIALS AND METHODS: The AP diameter of the spinal canal at L4 and thecal sac at L4-5 were measured on both MRI and CT performed on patients at less than one month interval. Measurements were obtained from axial CT images of the abdomen on CT and sagittal T1W (n = 98) and T2W (n = 78) MR images of the spine. The examinations were reviewed at more than 24 hours interval. Radiologists were blinded. Inter-observer agreement evaluation was performed prior to this study. Measurements were compared using a t test for paired variables. RESULTS: For the spinal canal, mean measurements were 0.4 +/- 1.5mm inferior on CT compared to MRI. For the thecal sac, mean measurements were 0.1 +/- 1.4mm inferior on CT compared to MRI. CONCLUSION: Measurements on CT and MRI for lumbar spinal canal and thecal sac are fairly comparable, with mean measurement differences inferior to the degree of precision of the measurement technique itself.
Assuntos
Imageamento por Ressonância Magnética , Estenose Espinal/diagnóstico por imagem , Estenose Espinal/diagnóstico , Tomografia Computadorizada por Raios X , Dura-Máter , Humanos , Vértebras Lombares , Imageamento por Ressonância Magnética/instrumentação , Imageamento por Ressonância Magnética/métodos , Variações Dependentes do Observador , Sistemas de Informação em Radiologia , Reprodutibilidade dos Testes , Fatores de Tempo , Tomografia Computadorizada por Raios X/instrumentação , Tomografia Computadorizada por Raios X/métodosRESUMO
Computed Tomography fluoroscopy for blocks and neurolysis provides a minimally-invasive, accurate and rapid alternative to surgery. Spinal and peri-spinal ultrasound-guided procedures, excluding peripheral procedures, will be discussed as well. The imaging-guided procedures discussed are performed using small needles. These percutaneous procedures must be performed with maximum patient comfort and cause as little complications as possible. These procedures should be performed by an experienced radiologist after discussion with the treating clinician.
