Primary carcinoma of the ureter is a rare pathologic occurrence. Still rarer is its diagnosis in life, because a large percentage of the cases reported in the literature were diagnosed at necropsy. In 1921, a very extensive review of the literature was made by Judd and Struthers,1at which time they found that twenty-five cases of primary malignant tumor of the ureter had been previously reported, not including their own case. Up to March 7, 1924, the date of a personal communication from Dr. W. F. Braasch, the case reported by Judd and Struthers was the only case of primary epithelioma of the ureter in which an operation had been performed at the Mayo Clinic. We have been able to find only two additional cases in the literature. Knack2reported a case of papillary carcinoma of the left ureter in a man, aged 73, in which the diagnosis