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In the retrospective study of Kannoth and colleagues1 in this issue of J Neurol Neurosurg Psychiatry (see page 943), a set of diagnostic criteria for intracranial infectious aneurysms (IAs) is suggested. The authors propose that infectious intracranial aneurysms would be predicted by the presence of a mandatory criterion and at least three supportive criteria from any of three domains with a sensitivity of 96% and specificity of 100%.
IAs are uncommon. They comprise 2–6% of all intracranial aneurysms.2 More than …