- How common are varicocoeles? New data on the prevalence in adolescence and new discussions: Comment on Article by A. Rais, S. Zarka, E. Derazne, D. Tzur, R. Calderon-Margalit, N. Davidovitch, A. Afek, R. Carel, H. Levine "Varicocele among 1,300,000 Israeli adolescent males: time trends and association with body mass index'