Abstract
Essentially all lesions common to the blood vascular system are found in the brain. In an article in a recent number of this journal, 1 the arteriovenous aneurysms or fistulas in the brain were analyzed. In this communication, the venous and capillary tumors, aneurysms and abnormalities will be considered. Although the relative frequency of vascular tumors and aneurysms of the brain is difficult to estimate, the actual number is rapidly increasing, owing to the more intensive development of neurosurgery and of the means by which the accurate diagnosis and localization of intracranial lesions can be made. In a series of about 600 verified tumors of the brain, the vascular tumors and aneurysms of the brain (excluding vascular anomalies) were 5 per cent. Eight of these tumors were arteriovenous; fifteen were referable to the venous and capillary system, and seven were arterial. The vascular lesions most favorable for treatment are those
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