1. Male Infertility Tied to Testicular Cancer Risk - US News and World Report
A common factor may boost the odds for both, researchers say

2. Testicular cancer : Causes, incidence, and risk factors  (Trust Mark: Doctor-Reviewed)
The exact cause of testicular cancer is unknown. There is no link between vasectomy and testicular cancer. Factors that may increase a man's risk for testicular cancer include: Abnormal testicle development; History of testicular cancer; History o...• Reviewer: David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine; Yi-Bin Chen, MD, Leukemia/Bone Marrow Transplant Program, Massachusetts General Hospital. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.