Hi - Is your brother still in remission? I've known some friends who have had Hodgins and non-Hodgkins Lymphoma but have never heard that it stunts growth. I realize that this height bothers him, but, to be realistic, he has so-far conquered a very complex disease!
There are many, many so-called 'short' men and women out there, and it's definitely not anything to be worried about! I hope you can convince him to just be happy that he is healthy and has a nice personality - that's what really counts, don't you think?

Mabent