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Updated: Jun 30, 2026

Anatomical Reconstructions of the Human Cardiac Venous System using Contrast-computed Tomography of Perfusion-fixed Specimens
Published on: April 18, 2013
The venous circle of Trolard
R Shane Tubbs1, M Loukas, M M Shoja
1Pediatric Neurosurgery, Children's Hospital, Birmingham, England. rstubbs@uab.edu
Abstract:
A venous anastomotic network is occasionally found at the base of the brain, which closely resembles the vicinal arterial circle of Willis. When present, this venous polygon is composed of the anterior cerebral and communicating veins, the basal vein of Rosenthal and the posterior communicating and lateral mesencephalic veins. We propose that this anastomotic ring be termed the venous circle of Trolard. This venous circle might cause bleeding with such procedures as an endoscopic third ventriculostomy. We believe that information regarding this venous circle may be useful to neuroradiologists or neurosurgeons operating at the base of the brain (Fig. 1, Ref. 10). Full Text (Free, PDF) www.bmj.sk.
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