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These authors present MR images in 7 patients who developed enhancing lesions after endovascular therapy for intracranial aneurysms, 3 of which were symptomatic. The number of lesions increased in 2, was stable in 1, decreased in 3, and disappeared in 1 patient. The authorsput forward that the imaging and clinical characteristics suggested a foreign body reaction. They found no correlation to a specific device, but a possible source may be the generic hydrophilic coating.