In all operative procedures on the bladder or prostate gland, epididymitis is a frequent and often a troublesome complication. Particularly is this the case in dealing with patients suffering from prostatic obstruction, either of the benign or of the malignant type. It is, of course, a well known clinical fact that epididymitis may arise at any time throughout the course of prostatic obstruction; and, while it is rarely a dangerous complication, it plays an important part in increasing the length of hospitalization of the patient and usually has a markedly depressing effect on the morale. In some extremely sick patients with lowered resistance, the added effect of this infection may prove to be too much for the individual to withstand, and in such cases, fortunately rare, the fatal outcome may be directly attributed to the added burden of the epididymitis. Then, too, in the very rare case in which a