Anomalies of the posterior communicating artery and their potential clinical significance.

Abstract:

:This study of the posterior communicating artery (PCoA) in 126 cranial cavities of adult cadavers revealed some hitherto unreported anomalies. These included: the origin of one PCoA from the ophthalmic artery inside the optic canal; the presence of three PCoA's on one side; the occurrence of two posterior cerebral arteries of different origin on one side; and the existence of junctional dilatations at both ends of a PCoA. Junctional dilatation at the commencement of the artery was seen in 6.3% of cases. More common anomalies were a fetal type of posterior cerebral artery in 31.7% and macroaneurysmal dilatation of the PCoA in 39.7% of cases. The presence of multiple arteries makes possible normal circulation in cases involving obstruction to any one of them. The junctional dilatation or dilatation of any other part of the PCoA, if pre-aneurysmal, may leak or rupture to produce subarachnoid hemorrhage. Arteries pressing on the oculomotor nerve may produce diplopia, and those compressing the optic chiasm and tracts may cause visual defects.

journal_name

J Neurosurg

journal_title

Journal of neurosurgery

authors

Bisaria KK

doi

10.3171/jns.1984.60.3.0572

subject

Has Abstract

pub_date

1984-03-01 00:00:00

pages

572-6

issue

3

eissn

0022-3085

issn

1933-0693

journal_volume

60

pub_type

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