1University Hospital Schleswig-Holstein, Campus Luebeck, Dept. of Urology, Lübeck, Germany, 2University Hospital Schleswig-Holstein, Campus Luebeck, Institute of Pathology, Lübeck, Germany, 3University Hospital Schleswig-Holstein, Campus Luebeck and Research Center Borstel, Leibniz Lung Center, Institute of Pathology, Lübeck, Germany