Intracranial aneurysms are rarely diagnosed during pregnancy. If treatment is necessary, surgery was traditionally preferred over embolization in case of ongoing pregnancy, due to concerns regarding foetal radiation exposure. We present a case of 21 mm unruptured carotid-ophthalmic aneurysm diagnosed during pregnancy and treated with flow diversion. Foetal radiation dose was estimated between 1 and 5 mGy, well below recommended limits. Double antiplatelet therapy with prasugrel and aspirin was administered between week 17 and week 37, followed by uneventful vaginal delivery at 39 weeks. The new-born infant did not present any clinical abnormalities. Post-natal angiography showed complete aneurysm occlusion. To our knowledge, this is the first report of flow diverter stent placement during ongoing pregnancy. Although a good outcome was observed in this case, this result should be interpreted with caution. Further studies are needed in order to better define the safety profiles of intracranial stents and double antiplatelet therapies during pregnancy.
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