McCormack, M., & Lapointe, S. (1988). Physiologic consequences and complications of vasectomy. Canadian Medical Association Journal, 138(3), 223–225.
Sterilization of men and women is the most popular method of contraception in Canada. The contraceptive effect of a vasectomy usually occurs within 3 months. The production of sperm, however, is not interrupted, and an increase in pressure proximal to the ligation site may cause rupture of the epididymis or the ductus deferens, with extravasation of spermatozoa and the formation of granulomas or sperm antibodies. Increased pressure may also explain the postvasectomy pain syndrome.
Only references a series of 18 patients with PVPS. No indication of % of population which suffer.