Abstract
To the Editor.— Now that vasectomy is being done by so many non-urologists, it seems timely to discuss the anomalies of the vas that are occasionally encountered, such as congenital absence, atresia, or complete duplication. While performing a recent vasectomy, I identified the right vas and ligated it normally. The left testicle was normal but no vas could be palpated above it. The patient then reminded me that I had done a urological work-up on him 12 years before and had told him that he had no kidney on the left side. The patient's record showed congenital absence of the kidney, ureter, ureteral orifice, and trigone on the left side. Six weeks after the unilateral vasectomy, the patient's ejaculate contained no sperm. A general practitioner in our area encountered the same situation while performing a vasectomy. An intravenous pyelogram (IVP) showed that the patient had no kidney on the side

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