The ancient knowledge of the cerebral arterial circle (CAC) angioarchitecture could be supplemented by either a new or a forgotten old fact about it. Therefore, 7 cases of a rare form of the CAC of fetuses were described, where the so-called intermediate communicating artery, as an excess vessel into the posterior part, represented either its new vascular component or the developmental segment of this part. The paper aims at revealing the fetal history and morphological features of this ‘underdeveloped’ posterior part of the CAC during the 2nd and 3rd gestational trimesters, which could be of anatomical and clinical meaning in similar prenatal and/or postnatal cases.

1.
Belenkaia, R.M. (1974) Varianti stroenia arterii osnovania mozga (in Russian). Vopr Neirohir 5:23–29.
2.
Bergquist, E. (1975) An anomalous posterior cerebral artery. Neuroradiology 8:213–215.
3.
Bogdanović, D., S. Marinković, S. Malobabić (1978) Morfološke varijacije zadnjeg segmenta Willis-ovog kruga i njihov značaj (in Serbian). Folia Anat Iugoslav 7:81–88.
4.
Gibo, H., C. Lenkey, A.L. Rhoton Jr (1981) Microsurgical anatomy of the supraclinoid portion of the internal carotid artery. J Neurosurg 55:560–574.
5.
Gillilan, L.A. (1975) Anatomy and embryology of the arterial system of the brain stem and cerebellum; in Vinken, P.J., G.W. Bruyn (eds): Handbook of Clinical Neurology. Amsterdam, North Holland, vol 11.
6.
Guerin, J., A. Gouazé, G. Lazorthes (1976) Le polygone de Willis de l’enfant et les facteurs de son modelage. Neurochirurgie 22:217–226.
7.
Hasebe, K. (1928) Arterien der Hirnbasis; in Adachi, B. (ed): Das Arteriensystem der Japaner. Kyoto, Verlag der Kaiserlichen Japanischen Universität, vol 1.
8.
Jeličić, I. (1985) Cerebrovaskularna kirurgija (in Croatian). Zagreb, Školska knjiga.
9.
Kayembe, K.N.T., M. Sasahara, F. Hazama (1984) Cerebral aneurysms and variations in the circle of Willis. Stroke 15:846–850.
10.
Lavieille, J., M. Choux, R. Sedan (1966) Étude anatomo-radiologique de l’artère communicante postérieure. Neurochirurgie 12:717–731.
11.
Lie, T.A. (1972) Persistent carotid-basilar and carotidvertebral anastomoses; in Congenital malformations of the carotid and vertebral arterial systems, including the persistent anastomoses; in Vinken, P.J., G.W. Bruyn (eds): Handbook of Clinical Neurology. Amsterdam, North Holland, vol 12, pp 289–339.
12.
Marinković, S., A. Ilić, M. Milisavljević, V. Kostić (1988) Funkcionalna i topografska neuroanatomija (in Serbian). Beograd, Savremena administracija.
13.
Marinković, S., M. Milisavljević, V. Antunović (2001) Arterije mozga i kičmene moždine. Anatomske karakteristike (in Serbian). Beograd, Bit inženjering.
14.
Milenković, Z., R. Vučetić, M. Puzić (1985) Asymmetry and anomalies of the circle of Willis in fetal brain. Microsurgical study and functional remarks. Surg Neurol 24:563–570.
15.
Padget, D.H. (1944) The circle of Willis. Its embryology and anatomy; in Dandy, W.E. (ed): Intracranial Arterial Aneurysms. New York, Hafner.
16.
Patten, M.B. (1968) Human Embryology, ed 3. New York, McGraw-Hill.
17.
Saeki, N., A.L. Rhoton Jr (1977) Microsurgical anatomy of the upper basilar artery and the posterior circle of Willis. J Neurosurg 46:563–578.
18.
Szdzuy, D., R. Lehmann (1972) Hypoplastic distal part of the basilar artery. Neuroradiology 4:118–120.
19.
Terminologia Anatomica: Federative Committee on Anatomical Terminology (1998). New York, Thieme, pp 81–85.
20.
Van Overbeeke, J.J., B. Hillen, C.A.F. Tulleken (1991) A comparative study of the circle of Willis in fetal and adult life. The configuration of the posterior bifurcation of the posterior communicating artery. J Anat 176:45–54.
21.
Vasović, L., Z. Milenković, S. Pavlović (2002) Comparative morphological variations and abnormalities of circles of Willis: A minireview including two personal cases. Neurosurg Rev 25:247–251.
22.
Yasargil, M.G. (1984) Microneurosurgery I. New York, Thieme.
Copyright / Drug Dosage / Disclaimer
Copyright: All rights reserved. No part of this publication may be translated into other languages, reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying, recording, microcopying, or by any information storage and retrieval system, without permission in writing from the publisher.
Drug Dosage: The authors and the publisher have exerted every effort to ensure that drug selection and dosage set forth in this text are in accord with current recommendations and practice at the time of publication. However, in view of ongoing research, changes in government regulations, and the constant flow of information relating to drug therapy and drug reactions, the reader is urged to check the package insert for each drug for any changes in indications and dosage and for added warnings and precautions. This is particularly important when the recommended agent is a new and/or infrequently employed drug.
Disclaimer: The statements, opinions and data contained in this publication are solely those of the individual authors and contributors and not of the publishers and the editor(s). The appearance of advertisements or/and product references in the publication is not a warranty, endorsement, or approval of the products or services advertised or of their effectiveness, quality or safety. The publisher and the editor(s) disclaim responsibility for any injury to persons or property resulting from any ideas, methods, instructions or products referred to in the content or advertisements.
You do not currently have access to this content.