Katie:
Wow- this blows me away. I just read your post and we wonder this ourselves about this. We have a 5 yr old boy with cystic fibrosis and a 4 yr old girl with chromosome 9q 21.2 q 22.1 deletion. They said her chromosome deletion is a "fluke", but how strange for you to also have a chromsome issue with another child. We have 4 children total, but the 5 and 4 yr old are ours together. I had a son and he had a daughter when we married. (they are healthy) I would like to talk more with you on this. If you want to send me a private message--please do. I know chromosome issues vary greatly!!! We are learning alot, but it is so different from the cystic fibrosis. We learned about her deletion when she was 1 from her having 2 long seizures and running lots of tests, etc..
(SORRY--I just read that your son with CF has the chromosome issue too, I misread, I would still like to talk to you if you want to. )
Fourkidsmom