VascularChronological changes in mri findings of spinal dural arteriovenous fistula
Section snippets
Patients and methods
Thirteen patients, 10 males and 3 females with ages ranging from 32 to 81 years (mean, 58 years), with spinal dural AVFs were treated in our institutes between 1993 and 1997. Five patients were treated by surgical interruption of the fistula, three by transarterial embolization with liquid material (N-butyl cyanoacrylate), and five by both embolization and surgery, because the initial embolization resulted in proximal occlusion of the parent artery. The interval between the two procedures was
Clinical findings
Pre- and postoperative clinical characteristics are summarized in Table 1. Initial symptoms were numbness of the lower extremities in eight patients, low back pain in three, and weakness of the lower extremities in two. The symptoms progressed gradually in all patients except one who showed rapid progression within 2 months (Case 10). Periods between onset and final treatment ranged from 2 months to 5 years. On admission, all patients had paraparesis and sensory disturbance of the lower
Discussion
Dural AVFs were formerly grouped as a single-coiled type of spinal AVM in Di Chiro’s classification, and occur predominantly in middle-aged or elderly males [15]. Most dural AVFs show gradual onset of symptoms, but approximately 10% have acute onset. Common symptoms at diagnosis are leg weakness, sensory disturbance, disturbed micturition or defecation, and pain [16]. Spinal angiography is diagnostic for this disorder; however, MRI is the first neuroimaging investigation of patients with such
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Cauda Equina Occupation Ratio as a New Imaging Parameter for the Evaluation of Spinal Dural Arteriovenous Fistulae
2019, World NeurosurgeryCitation Excerpt :Currently, there is no agreement on the association of anomalous MRI findings with the symptoms of SDAVF.23,38-41 According to Horikoshi et al.,26 there was a correlation between the extent of high-intensity areas on T2WI sequences and preoperative neurological deficits. Yen et al.42 demonstrated that the extent of venous congestion and cord edema was significantly associated with the preoperative ALS, whereas Kaufmann et al.43 reported that pre- and posttreatment MRI findings did not predict functional outcomes.
Long-term outcome of cervical and thoracolumbar dural arteriovenous fistulas with emphasis on sensory disturbance and neuropathic pain
2010, World NeurosurgeryCitation Excerpt :A spinal dural arteriovenous fistula (SDAVF) is the most common type of spinal vascular malformations and constitutes 60% to 80% of all spinal arteriovenous malformations (3, 31). Recent radiographic modalities provide more frequent and accurate diagnosis of SDAVF, along with a better understanding of its pathophysiology (12, 13, 16). Symptoms of this disease are attributed to chronic venous congestion, which occurs most frequently in the thoracolumbar region (17).
Factors that affect the surgical outcomes of spinal dural arteriovenous fistulas
2006, Surgical NeurologyHigh resolution 3D T2 imaging of the spinal canal and spinal cord
2005, Feuillets de RadiologieUtility of MRI in spinal arteriovenous fistula
2012, NeurologyCitation Excerpt :Our literature review revealed 12 case series, describing MRI data for a total of 304 cases. Eleven of these series reported the prevalence of specific MRI findings for a total of 284 cases (table 4).8,11–15,20–24 The remaining series did not report the frequency of specific findings and could not be included.7