[Early detection of urogenital cancers: kidney, bladder, prostatic and testicular cancers].

Since there is no definition of early cancer for the genitourinary tract yet, so we tried to make a definition of it before main subjects are discussed. States of early cancer are thought to be small, to have neither surrounding invasion nor metastasis and also to have possibility to be found and to be cured. The early cancers of the genitourinary tracts are primary lesion less than 3 cm in diameter of the renal cell carcinoma, prostatic cancer of stage A and B and testicular tumor of pT1N0M0. Definition of bladder cancer is too difficult to be established at the present time.