Myxomatous cardiac emboli resulting in multiple fusiform intracranial aneurysms (there and everywhere else in the body) are a classic. There are so few of them it is understandably hard to know what is the natural history (after resection). Certainly some (seemingly a minority) continue to grow but many dont. The multiplicty and fusiform often distal nature of these make them difficult treatment targets. Overall, for practical reasons, most end up being observed.
Below is a classic case.
And one more case — together with Peter Kim Nelson and Mykhailo Kostiuk
