Denise or Spreedog,Would you advise a 30 year old male non smoker who had?

a papillary bladder tumour removed30 months ago and is fine, to visit a Doctor in America.The chairman of his work said they would help him so a)Is it worth all the hassle of flying from Europe b)How can i find DR (Spreedog )at the Mayo clinic .3) or just follow the orders of the doctor who operated on him?