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HIGH FLOW MEDULLARY VENOUS MALFORMATION WITH ANEURYSM ON THE PROXIMAL ARTERY : A CASE REPORT Satoko Ochi 1 , Akira Hirano 1 , Kuniyasu Kanwo 1 , Kazuo Hashi 2 1Department of Neurosurgery, Tomakomai Ohji General Hospital 2Department of Neurosurgery, Sapporo Medical College Keyword: medullaly venous malformation(MVM) , cerebral aneurysm , hemodynamic pathogenesis pp.361-366
Published Date 1990/4/1
DOI https://doi.org/10.11477/mf.1406900044

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  • Abstract
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Medullary Venous Malformation with an aneur-ysm is uncommon and only 4 cases have been reported in previous papers. We reported a case of a medullary venous malformation (MVM) of the frontal lobe with an aneurysm on its proximal artery.

A 48 year old female with numbness of right fingers visited our hospital. On the CT scan, an abnormal enhanced area was found inside the left frontal lobe. The left carotid angiography showed both of an aneurysm around A corn A in early arterial phase, and "MVM with early blush" in capillary-early venous phase. MRI showed linear signal void crossing the cortex to join paravent-ricular low intensity area (LIA) with slight cor-tical atrophy on sagittal slice. The CBF study by Xe-SPECT proved a high flow lesion, with mean CBF 69 (left), 59 (right) mg/100 g brain/min, Pro-tective operation only for aneurysm was perfor-med.

The MVM in our case was proved to be a "high flow-low resistance system" by CBF study, although MVM has been considered a "low flow system". Reviewing papers, there were 3 cases of "high flow MVMs" confirmed by the measur-ment of CBF, all of them were large sized (>4 cm) and with early blush angiographically.

We conculude that lagre sized MVM with early blush needs hemodynamic inspectation and special care to prevent "high flow MVMs" from hemorrhage and the steal.


Copyright © 1990, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 2185-405X 印刷版ISSN 0006-8969 医学書院

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