Hi, Whatever--
When I originally came to this site, there was a woman, Gabrielle, whose son James had Evans syndrome, too. Haven't seen her here for about 4 years, but here's the gist of it:
He tried Rituxan, and it worked pretty well for him for at least two years, then as he was heading off to college, his counts dropped and he got a second round. Don't think I've seen her since then.
Anyway, I've got two "cowabunga" daughters, and it's my second one who has ITP--no Evans. She was involved in whitewater rafting, rock climbing and riding BIG fast horses--and didn't want to give any of it up. We rode the ups and downs with her counts while she was on dexamethasone doses--high dose prednisone, about once every 4-5 weeks. IVIg and WinRho hadn't done much for her. If her counts were up, she could participate, but if they were below 50K, no way. When the steroid side effects got to be just too much (about 9 months later--no weaning involved on Dex pulses), we looked around for something else, short of splenectomy--and James' and the other teen's success with Rituxan made it the best option we could see. That was before N-Plate and Promacta--so we don't know if they may have worked for her--but Rituxan doesn't require ongoing shots and (with success) endless CBC's and doctor appts.
As a result of what we read on this site, we/she decided to go for Rituxan. My daughter was the third teen on this site to use it, as near as we could tell. She was 15 years old at the time, and had had ITP for a year. That was back in Sept.-Oct. 2002. The first dose got her higher counts than Dex ever did, then she has some ups and downs (and pneumonia) but within six weeks, her counts were in the normal range. They
still are to this day, eight years, seven months later (just got a CBC in March or April of this year)! All from that one and only set of 4 Rituxan infusions.
She has gone to college, skiing in Colorado, and scuba diving all over (she's in Bermuda as I write)--and is employed training guide dogs for the blind and working with manatees. She also had an internship as a dolphin trainer right out of college! None of that is BMX racing, but several things she does are risky. Rituxan has given her control over her life, which was sorely lacking, and quite frankly, was making her a basket case.
Her older sister was concerned for her--but felt a bit shunted aside, I think. She had always seemed to be quite independent, but she definitely felt we weren't there for her as much as she would have liked. It kinda shocked (and hurt) me when she told me years later that she'd consulted with her boyfriend's mom about colleges for her, cause we were 'dealing with Caitlin.' And my husband and I felt we had done pretty well, not coddling, insisting on good grades, chores and participation in things; and we felt we
were involved in the older daughter's high school years--swim team parents, Girl Scout leader (for both girls' troops)--her dad drove her all over several states for climbing competitions, and I took her to check out colleges! The long and short of it--you can only do what you can do--and even then, it may not be enough in their view! :S
You are not alone in feeling as you do--but there may be a way out if you keep searching and trying different options! To infinity and beyond with those platelets!

Ann, Caitlin's (now 24) Mom P.S. He'll still need his helmet!