Cryptorchidism Cryptorchidism is distinct from monorchism, the condition of having only one testicle. Though the condition may occur on one or both sides, it more commonly affects the right testis. A testis absent from the normal scrotal position may be: About two-thirds of cases without other abnormalities are unilateral; most of the other third involve both testes. In 90% of cases, an undescended testis can be felt in the inguinal canal. In a small minority of cases, missing testes may be found in the abdomen or appear to be nonexistent (truly "hidden"). Undescended testes are associated with reduced fertility, increased risk
Users' Guides to the Medical Literature guides to the medical literature, IX: a method for grading health care recommendations. JAMA, 274, pp. 1800–1804. Giacomini, M.K. & Cook, D.J., 2000. Users’ Guides to the Medical Literature: XXIII. Qualitative Research in Health Care A. Are the Results of the Study Valid? JAMA, 284(3), pp. 357–362. Available at: http://jama.ama-assn.org/cgi/doi/10.1001/jama.284.3.357 Giacomini, M.K. & Cook, D.J., 2000. Users’ Guides to the Medical Literature: XXIII. Qualitative Research in Health Care B. What Are the Results and How Do They Help Me Care for My Patients? JAMA, 284(4), pp. 478–482. Available at: http://jama.ama-assn.org/cgi/doi/10.1001/jama.284.4.478. Guyatt, G., Sackett, D. & Cook, D., 1993. Users’ guides