Аннотация:Mutual adhesiveness of urothelial tissue cells have been studied in healthy donors and patients with benigh and malignant bladder tumors. The decreased mutual adhesiveness has been shown not only for tumors, but ior surrounding urothelial tissue as well. Urothelial tissue integration, T-cell immunity and parameters of leukocyte integrities were affected most of all in bladder tumor stage T2 and 13. Basing on these findings, the authors recommend conservative therapy only in superficial bladder cancer.