The Natural History of Dural Arteriovenous Shunts: The Toronto Experience

To the Editor:With interest we have read the article “Natural history of dural arteriovenous shunts” by Soderman et al1 in Stroke . We agree that the dural arteriovenous shunt still is a puzzling neurovascular entity that poses a challenge in knowing the natural disease course. Therefore, every attempt to analyze large series and particularly the events during follow-up should be eluded to. However, things should also be seen in perspective and so, to avoid erroneous conclusions by the reader, we want to make some critical comments.First of all, the authors differentiate 3 separate periods of time at risk: the …