Abstract: The present invention relates to a method of classifying a sample of a patient that suffers from or being at risk of developing urothelial or bladder cancer, said method comprising the steps of: a) determining in said sample from said patient, the presence or absence of alteration in an FGFR gene and/or the expression level of at least one gene encoding for a receptor selected from the group consisting of FGFR1, FGFR2, FGFR3 or FGFR4, and b) classifying the sample of said patient from the outcome of step a) into one of at least two classifications, said classifications comprising good and poor prognosis for treatment with an anti-cancer agent.