Dilated intercavernous sinuses: an MR sign of carotid-cavernous and carotid-dural fistulas |
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| Authors: | A D Elster M Y Chen D N Richardson P R Yeatts |
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| Affiliation: | Department of Radiology, Bowman Gray School of Medicine, Wake Forest University, Winston-Salem, NC 27103. |
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| Abstract: | Dilated venous channels traversing the sella and connecting the two cavernous sinuses were seen on contrast-enhanced MR images in four patients with angiographically proved carotid fistulas. The anatomy and variations of these so-called intercavernous sinuses are discussed and are demonstrated in Latex-injected anatomic specimens. Direct visualization of the intercavernous sinuses on contrast-enhanced MR images may serve as an ancillary sign for the diagnosis of carotid-cavernous or carotid-dural fistulas near the sella. |
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