Primary treatment of a blood-blister-like aneurysm of the internal carotid artery with Guglielmi detachable coil embolisation.

Blood-blister-like aneurysms (BBAs) are rare but challenging to treat owing to their fragile, thin walls and poorly defined necks. Studies have shown many complications related to this type of aneurysm. In particularly, other authors have reported high rates of complications arising within a few weeks of BBAs treated with primary endovascular coiling. We report a 44-year-old woman with subarachnoid haemorrhage due to a ruptured BBA to demonstrate successful primary treatment with endovascular coiling without complications or regrowth at 6-month follow up.