Immunohistochemiocal subtyping using CK20 and CK5 can identify urothelial carcinomas of the upper urinary tract with a poor prognosis. oleh Danijel Sikic, Bastian Keck, Sven Wach, Helge Taubert, Bernd Wullich, Peter J Goebell, Andreas Kahlmeyer, Peter Olbert, Philipp Isfort, Wilhelm Nimphius, Arndt Hartmann, Johannes Giedl, Bridge Consortium