Carcinoma at any situation in the urinary tract is most serious, and the question of cure is controlled largely by the same factors which govern the cure of cancer in any other organ; namely, early diagnosis and radical treatment by surgery, radium and roentgen rays. Furthermore, the chance of cure is greater if the lesion originates in any portion of the urinary tract that can be completely removed surgically, together with all associated lymphatic vessels. Radical procedures instituted to eradicate any malignant process are always more favorable in the early small lesion of slow growth and are less favorable as the lesion extends and also if it is of greater activity. Our experience in eighteen positively proved cases of this disease has served to emphasize certain points in diagnosis and surgical management which we have noted are extremely essential if a higher percentage of cures are to be effected than