THE INFREQUENT incidence of primary ureteral tumors is probably responsible for the concept that all ureteral neoplasms are similarly malignant and all require nephro-ureterectomy and bladder cuff removal as the definitive therapy. The paucity of information in regard to metastasis, local extension, pathological description, and follow-up presently precludes the determination of the best form of management for the many varieties of primary ureteral tumors. The purpose of this paper is to show that extensive surgical therapy is not the only form of treatment.Approximately 1,200 ureteral tumors of all types have been reported and about 75% of these have been interpreted as being malignant. Of the benign tumors, only the papilloma and polyp have occurred with sufficient frequency to be other than the rare single case report. Of the malignant neoplasms, the transitional cell and epidermoid carcinomata occur with similar frequency. A three-to-one preponderance of ureteral tumors in males and