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AJNR - American Journal of Neuroradiology

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American Journal of Neuroradiology 20:27-31 (1 1999)
© 1999 American Society of Neuroradiology

ARTICLE

Lumbar Extradural Hemangiomas: Report of Three Cases

Antoni Rovira^,a, Alex Rovira^a, Jaume Capellades^a, Martin Zauner^a, Rosa Bella^a and Mariana Rovira^a

^a From the Servei de Diagnòstic per Imatge and Unitat de Diagnòstic per Imatge d'Alta Tecnologia (An.R., M.Z.) and the Departament de Patologia (R.B.), Consorci Hospitalari del Parc Taulí, Sabadell, Spain; the Unitat de Ressonància Magnètica, Hospital General Universitari Vall d'Hebron, Barcelona, Spain (Al.R., J.C.); and the Centre Radiològic Computaritzat, Barcelona, Spain (M.R.).

Summary: The CT, MR, and histologic findings of three patients with surgically proved lumbar extradural cavernous and arteriovenous hemangiomas are reported. All three patients suffered from radicular and low back pain that disappeared completely or nearly so after total surgical excision. In each case, neuroimaging studies showed a well-defined ventrally located extradural mass with no bone involvement. On MR images, all lesions were homogeneous and isointense on noncontrast T1-weighted images and hyperintense on T2-weighted images relative to the intervertebral disk. Homogeneous enhancement was seen in one of the two cases in which contrast-enhanced T1-weighted images were obtained. Purely extradural hemangiomas should be included in the differential diagnosis of lumbar extradural soft-tissue lesions. Features that may help to distinguish this entity from the more common extruded disk herniation or neurogenic tumors are its homogeneous high signal intensity on T2-weighted images, ovoid shape, and lack of anatomic relationship with the adjacent intervertebral disk or exiting nerve root.

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