Can more brain aneurysms be fixed by coiling in future? (was told my 5mm aneur. can be clipped, would need a stent to coil) fearful of elective cran.

Yes, size matters : small aneurysms can be cooled but larger ones require a clip. Also, the base of the aneurysm , whether broad or narrow, can help determine clipping or coiling.

Comments: Your brain aneurysm is currently small, and there is correlation with a size larger than 9 mm resulting in higher risk of rupture. You need to know, if hemorrhage were to occur, you would have a 50% chance of never living to be treated within hospital setting. Appreciate your concerns, and would get several neurosurgical opinions prior to signing a consent.