Imaging of angiographically occult cerebral vascular malformations.

The angiographically occult vascular malformations represent an important cause of cerebral pathology. The propensity for significant yet often limited symptomatology provides for frequent challenge in clinical management. Understanding in diagnostic evaluation of occult vascular lesions is often limited by varying application of pathologic diagnosis and classification. This article attempts to clarify issues of classification while also discussing imaging evaluation and its role in clinical management.