[Histologic structure and spread of malignant neoplasms within the urinary bladder (author's transl)]

In 96 out of 250 cases of bladder cancer, neoplastic tissue was found by biopsy in areas within the bladder but remote of the primary and unsuspiciously looking mucosa. Neither the histologic type of the tumour nor the degree of infiltration of the primary allow predictions regarding remote cancerous lesions within the bladder. It must be concluded: In bladder cancer, indication and choice of treatment must take into consideration that the neoplastic process involves the urinary bladder as a whole.