I have been in a similar situation to yourself having undergone chemotherapy and a stem cell transplant for non-hodgkins lymphoma which was diagnosed in '95.
I am a rotary pilot and did initially have a few problems regaining my Class 1 certification but I found Dr Sally Evans extremely helpful and within approximately 20 months of being diagnosed I was back to work initially with a restricted certificate but now unrestricted with close follow up by my specialist and the CAA.
As eden mentioned the Anthracycline was one of the major problems in regaining Class 1 certification although it appears that the view on this may have softened slightly.
Good luck and if you have any other questions feel free to e-mail.