From:  Cerebral amyloid angiopathy: updates on pathophysiology, diagnosis, and management

 Key MRI findings indicative of CAA.

Typical findingsKey notes/Significance
Lobar intracerebral hemorrhages (ICHs)Spontaneous hemorrhages in the cortical or subcortical regions, often multiple and recurrent
Cerebral microbleeds (CMBs)Small, round hypointense lesions predominantly in lobar regions, best visualized using gradient-echo T2*-weighted or susceptibility-weighted imaging (SWI) sequences [49]
Cortical superficial siderosis (cSS)Linear hypointensities along the cortical surface, representing chronic blood product deposition, detectable via SWI [36]
White matter hyperintensities (WMHs)Areas of increased signal intensity on fluid-attenuated inversion recovery (FLAIR) sequences, indicating chronic small vessel ischemic changes [51], multiple punctuate subcortical FLAIR hyperintensities (i.e., a multispot pattern) [52]
Enlarged perivascular spaces (EPVS)Dilated spaces surrounding small blood vessels, more prominent in the centrum semiovale, observable on T2-weighted images

MRI: magnetic resonance imaging; CAA: cerebral amyloid angiopathy.