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A middle-aged man presented with new-onset vertigo and truncal imbalance. MR scan of brain showed an incidental giant partially thrombosed anterior communicating artery aneurysm with concentric blood products of varying age (figure 1). Subsequent catheter angiography showed the ‘water-hammer’ effect (video 1).
Twitter Adam A Dmytriw @AdamDmytriw
Contributors Conception and design, acquisition of data, analysis and interpretation of data: all authors. Drafting the article: AAD, AA and VXDY. Critically revising the article: VXDY. Approved the final version of the manuscript on behalf of all authors: AAD.
Competing interests None declared.
Patient consent for publication Obtained.
Provenance and peer review Provenance and peer review. Not commissioned. Externally peer reviewed by David Werring, London, UK.