Dural artery from the supraclinoid internal carotid artery to the anterior clinoid process: origin, course and clinical implications.

Dural artery from the supraclinoid internal carotid artery to the anterior clinoid process: origin, course and clinical implications.

World Neurosurg. 2018 Dec 26;:

Authors: Salunke P, Singh A, Rekhapalli R

Abstract
BACKGROUND: /objectives: Dura of the anterior clinoid process (ACP) is presumably supplied by the ophthalmic and external carotid artery branches. There is a less recognised artery described by Yasargil that arises directly from the supraclinoid internal carotid artery (ICA) and supplies the ACP dura. We studied the origin and course of this direct branch in patients in whom the carotid cistern was dissected for lesions not involving the carotid cistern and ACP dura. The management implications of this arterial twig have been described.
MATERIALS AND METHODS: Thirty patients operated through transsyvian route for suprasellar lesions were included. The arterial branch from the supraclinoid ICA to clinoidal dura was dissected and studied under high magnification RESULTS: A thin solitary artery could be delineated in 21 patients. In 14 patients, it originated from the dorsomedial surface of ICA at its bifurcation close to the A1 origin. In the remaining 7, it was seen arising from dorso-medial surface of ICA,2-4mm proximal to bifurcation. The artery coursed from medial to lateral and pierced the clinoidal dura, 1-3 mm lateral to the entry of carotid. The artery had no branches.
CONCLUSION: The knowledge of this arterial twig to clinoidal dura is important as this supply may be responsible for feeding the tumour arising from dura arising from anterior clinoid making pre-operative embolization impossible. In addition, the tumour may grow along with this vessel and infiltrate the adventitia of ICA at the origin of this vessel.

PMID: 30593957 [PubMed - as supplied by publisher]

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