BILATERAL GIANT ANEURYSMS OF THE INTERNAL CAROTID ARTERY

An unusual case of bilateral giant aneurysms of the internal carotid artery, one arising from the intracavernous portion of the right internal carotid artery and the other from the supraclinoid portion of the left internal carotid artery, is reported. Socalled megadolichobasilar anomaly is associated with such giant aneurysms of the internal carotid artery.

Characteristic findings were seen in plain roentgenograms of the skull, especially in the laminagrams, bilateral carotid angiograms, right retrograde brachial angiograms, pneumoencephalograms, cavernous sinus venograms and brain scans.

In contrast to the many roentgenologic findings, the clinical manifestations were few. There was a history of epistaxis and blurred vision of the left eye. Neurologic examination revealed bilateral optic atrophies and decreased visual acuity of the left eye with an upper quadrant temporal anopia. The patient had no extraocular muscle palsy, no olfactory trouble, and no evidence of hypopituitarism.

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