 The presence of CAA has been particularly associated with AD and studies have demonstrated that MBs occur in 12-33 of subjects with typical Alzheimers dementia, with a large proportion of subjects showing multiple MBs. The presence of MBs has been associated with older age and a greater degree of white matter hyperintensities WMH in Alzheimers dementia. The association between MBs and WMH, a marker of cerebrovascular disease, suggests cerebrovascular disease may also play a role in the etiology of MBs in AD. However, approximately 16 of AD subjects do not present with episodic memory loss, but instead display language problems such as poor naming and impaired sentence repetition, or visuospatial and visual perceptual deficits, and are referred to as atypical AD. Since AD is associated with CAA, one would assume that CAA and hence MBs, would also occur in atypical AD, although no studies have assessed MBs in atypical AD. 