Hi and welcome to the Chiari forum.
As cash mentioned above there r many siblings that have chiari and some that a parent and a few siblings....the research on this connection and how it affects family is still being done.
This is not something that u can say comes from either one side or the other, mom verses dad, as I know a few mom's and their children were affected and I know a few that it was the father and the child....
and a few just the children....so far neway.,...at times it appears to be so random.
Since ur boys r so young, and one was already dx'd and treated make sure they r checked for sleep apnea as well....
Do keep us posted on how both ur boys r doing : )
thank you so much and yes he is a very brave little boy!
First off I can't imagine how strong your 10 year old must be to go through that surgery! Pray everything is going better. Yes I have heard of 2 siblings having it a good friend of mine and her sister both have it and had the surgery as adults. Praying that u find answers.