At 4.2 you'll get CT scanned every year for yours probably
mines every 6 months now
They grow slow

So Albert Einstein in 1948 had a surgeon wrap his aneurysm in saran wrap
it lasted 7 years , for some reason he did not let the surgeon fix the aneurysm again with better technology. For being a genuis he wasn't that smart , he could have lived 10 more years