Occlusion of the internal carotid artery by intracranial tumors.

Occlusion of the internal carotid artery by an intracranial tumor occurs only rarely. Three such cases are reported here. All were parasellar tumors, 2 meningiomas and 1 pituitary adenoma. The occlusion was demonstrated by carotid angiography in all cases. The location of the tumor was demonstrated by a computerized tomographic (CT) scan in 1 case. These 3 cases were encountered in a neurosurgical series of over 4,500 brain tumors and 10,000 angiographic examinations during the period 1952 to 1979.