Cirsoid aneurysms are not rare. Vascular changes about the orbit are reported under various titles : arteriovenous aneurysm, racemose aneurysm, pulsating angioma, cirsoid aneurysm and others. The cause in all cases is an abnormal communication between the arteries and the veins. The most commonly used title is cirsoid aneurysm.
Cirsoid aneurysms have been classified as tumors,1 partial tumors2 and arterial angiomas. Reid,3 reporting numerous cases of cirsoid aneurysm, stated that the aneurysms are all the result of a free abnormal communication between the arteries and the veins and are in no sense neoplastic. They may be congenital or traumatic in origin.
Cirsoid aneurysms as a rule are widespread dilatations of neighboring arteries and veins. The size varies with the duration of the aneurysm. A continuous thrill and bruit are heard over the swelling, and the vessels involved pulsate. They differ from arterial angiomas, over which there is no
SNIDERMAN HR. CIRSOID ANEURYSM OF THE ORBIT: REPORT OF TWO CASES. Arch Ophthalmol. 1940;24(6):1190–1196. doi:10.1001/archopht.1940.00870060132009
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