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 Guyatt introduced the term "evidence-based medicine" to stress the role of rigorous, systematic evidence from clinical research in conjunction with patients’ values and preferences in clinical decision-making. A group of academic physicians subsequently formed the international Evidence-based Medicine Working Group and published a 1992 article announcing the "new paradigm" of evidence-based medicine. The Evidence-based Medicine Working Group decided to build on the popular series in the "Canadian Medical Association Journal" by creating a more practical approach to applying the medical literature to clinical practice. Championed by Dr. Drummond Rennie, an editor of the "Journal of the American Medical Association", the