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  • Title: Congestive myelopathy due to cervical perimedullary arteriovenous fistula evaluated by apparent diffusion coefficient values - case report.
    Author: Inoue T, Takahashi T, Shimizu H, Matsumoto Y, Takahashi A, Tominaga T.
    Journal: Neurol Med Chir (Tokyo); 2006 Nov; 46(11):559-62. PubMed ID: 17124374.
    Abstract:
    A 22-year-old woman presented with a cervical perimedullary arteriovenous fistula (AVF) manifesting as right upper and lower extremity weakness. T2-weighted magnetic resonance (MR) imaging showed intramedullary hyperintensity believed to be caused by venous congestion. Preoperative diffusion-weighted MR imaging showed increased apparent diffusion coefficient (ADC) value. Spinal angiography demonstrated an AVF fed mainly by the right C-5 radicular artery. Complete obliteration of AVF was achieved by endovascular embolization and microsurgical shunt occlusion. The ADC value was normalized and her neurological deficits improved after endovascular surgery, whereas T2-weighted MR imaging still demonstrated the lesion. The high preoperative ADC value probably indicated reversible vasogenic edema and immediate normalization of the ADC value suggests a good clinical outcome.
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