Abstract
Spontaneous convexity SAH in the elderly has heretofore been of uncertain origin until several recent case reports have suggested cerebral amyloid angiopathy (CAA) as the etiology. To better appreciate the relationship of convexity SAH in the elderly to CAA. The case histories and MR imaging findings of 4 patients with spontaneous convexity SAH were examined. T2*-weighted imaging at the time of symptomatic SAH demonstrated features of prior lobar hemorrhage, microbleeds, and/or superficial hemosiderosis fulfilling diagnostic criteria of CAA in all patients. CAA may be the foremost cause of convexity SAH in the elderly.