Aspergers and cancer

Hello, our 16 yo has just been diagnosed with leukemia and we are wondering if there is any special support group for teens with HFA in the same situation? It has all been a shock for us but he seems not too bothered...I guess is a good thing, unless he is keeping his feelings to himself? We will get support but wondered if there is anything more specific out there for him? Or anyone has gone or is going through the same? Thanks.