Medline ® Abstracts for References 29,30
of 'Overview of vasectomy'
Does vasectomy cause testicular cancer?
Hewitt G, Logan CJ, Curry RC
Br J Urol. 1993;71(5):607.
Between 1975 and 1990, 330 men developed testicular tumours in Northern Ireland. Their names were cross matched with a sample of 2904 men who had undergone vasectomy between 1970 and 1985. The expected numbers of tumours in vasectomised patients was 2, while the actual number was 1. Our experience does not indicate that vasectomy causes testicular cancer.
Department of Surgery, Ulster Hospital, Belfast.
Vasectomy and the incidence of testicular cancer.
Strader CH, Weiss NS, Daling JR
Am J Epidemiol. 1988;128(1):56.
Adult male residents of 13 counties of western Washington state in whom testicular cancer had been diagnosed during 1977-1983 (n = 333) were interviewed over the telephone regarding their history of genital tract conditions, including vasectomy. For comparison, the same interview was given to a sample of 729 men selected from the population of these counties by dialing telephone numbers at random. A higher proportion of cases than controls reported having had a vasectomy (relative risk = 1.5, 95 per cent confidence interval = 1.0-2.2). However, the association was restricted entirely to Catholic men. Whereas a history of vasectomy was reported with approximately equal frequency by Catholic and non-Catholic cases, only 6.3 per cent of Catholic controls reported such a history in contrast to 19.7 per cent of other controls. While the authors cannot rule out the possibility that there is a true difference of the effect of vasectomy on the incidence of testicular cancer as a function of religion, it seems more plausible that selective underreporting by Catholic controls has produced a spurious relation.
Hanford Environmental Health Foundation, Richland, WA.