It's frightening when you receive news like this. How was it diagnosed, did you have an MRA, an angiogram, or both? My neurosurgeon calls the angiogram the 'gold standard'. Have you talked with your surgeon about further tests?

Coiling or stenting is certainly a less invasive option, but yes, there can be problems and, maybe, further surgeries. My aneurysm was 5mm when my doctor he decided to intervene. I know they aren't always able to 'get to' the aneurysm with 'clipping', and use coiling instead. I had the clipping and was pretty terrified! They were going to cut into my head and dig around! What helped me was my complete confidence in my surgeon. He chose to clip because it was accessible and permanent. I had a follow up angiogram to confirm everything was good.

You need to have time with your surgeon to get your questions answered. Where are you at with this? I see you posted awhile ago. There aren't alot of people in this section of the forum.