einstein (São Paulo). 31/out/2024;22:eAI0998.
Dural arteriovenous fistula associated with medullary ependymoma: an unusual association
DOI: 10.31744/einstein_journal/2024AI0998
A 42-year-old woman presented with progressive paraparesis; after magnetic resonance imaging of the neuroaxis, an intramedullary tumor was observed at T4-T6 with a syringomyelia and dilatation of the venous system of the posterior fossa. Cerebral angiography revealed dural arteriovenous fistula (DAVF). To treat DAVF, the medullary tumor was surgically resected, and histopathological analysis confirmed the presence of an ependymoma (). The presence of DAVF associated with spinal tumors has not been reported in the literature to date, which makes this article unique.
Ependymomas are highly vascular. Tumor-induced biochemicals such as a vascularization factor, hypoxia-inducible factor 1, vascular endothelial growth factor, and other thrombotic chains might contribute to the generation of DAVF.(,)
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