Abstract
Unruptured aneurysms are often discovered incidentally on MRI. In some patients, multiple aneurysms cannot be treated with only craniotomy or endovascular surgery. When both craniotomy and endovascular surgery are deemed necessary, craniotomy is generally performed first because of the use of antiplatelet agents involved, followed by endovascular surgery several months later. However, no clear criteria for this treatment policy have been elicited. We investigated therapeutic outcomes in patients with aneurysms treated by craniotomy followed by endovascular surgery at our hospital. This was a retrospective study including patients undergoing craniotomy clipping of one or more unruptured aneurysms at one site and endovascular surgery for those at a different site, between January 2012 and May 2018 in our hospital. The types of treatment, interval between treatments, complications, and other factors were analyzed. This study included 22 patients who underwent a total of 25 craniotomies and 23 endovascular surgeries. The mean time from final craniotomy to initial endovascular surgery was 118 days. Although treatment-related complications occurred in three patients, they were not associated with the time interval between craniotomy and endovascular surgery or the timing of the start of the antiplatelet therapy. The treatment was successful and was carried out safely and appropriately by first performing the craniotomy, followed by a set interval of time before starting the antiplatelet therapy, and then performing the endovascular surgery. Further studies analyzing more cases are required to establish the criteria better, such as the appropriate interval time between treatments.
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