Cerebral amyloid angiopathy with related inflammation (CAA-RI) is an uncommon inflammatory subtype of CAA, with a variety of presentations that can mimic other focal and diffuse neurological disorders. We present a 63-year-old man with recurrent stereotyped focal neurological symptoms, who was initially diagnosed as capsular warning syndrome and treated with antithrombotic therapy. Atypical imaging led to further investigation including a cerebral biopsy, which confirmed CAA-RI; he improved clinically and radiologically with immunosuppression. This case highlights how CAA-RI is often under-recognised and that patients risk receiving inappropriate anticoagulation and delay in starting immunosuppression.
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Contributors DM compiled case report, collated radiology images, writing and editing. KW compiled literature review, introduction and discussion, writing and editing. TR provided histopathology images, provided expertise and insight into neuropathology. MB is in charge of patient’s care. Assisted with writing, editing and compilation.
Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.
Competing interests None declared.
Provenance and peer review Not commissioned: externally reviewed by Neil Scolding, Bristol, UK.
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