Re: Mecedes Marín-Aguilera, Lourdes Mengual, María José Ribal et al. Utility of fluorescence in situ hybridization as a non-invasive technique in the diagnosis of upper urinary tract urothelial carcinoma. Eur Urol 2007;51:409-15 and Alan M. Nieder, Mark S. Soloway and Harry W. Herr. Should we abandon the FISH test? Eur Urol 2007;51:1469-71