The 3.8 is less than my first "encounter" with this - it was something in the 4.25 range which my cardiologist thought didn't warrant anything past "observation" and a yearly scan. It wasn't until it went over 4.5 that he referred me to a surgeon/cariologist and he didn't think we should do anything at 4.9 x 5.1. In one year it grew to 5.1 x 5.7 and THEN he said to do something.