Cryptorchidism

Cryptorchidism is a congenital anomaly in which one or both testes have not reached the scrotum. Testicular descent depends on coordinated hormonal and mechanical signals during fetal development. Testosterone and insulin-like factor-3 support different stages of the process, while the gubernaculum helps guide the testis toward the scrotum. Disruption anywhere along this pathway can leave the testis in the abdomen, inguinal canal, or another abnormal location. The scrotum provides a cooler environment needed for normal germ-cell development. Continued residence in the warmer abdomen or groin can impair future fertility potential. An undescended testis also carries an increased lifetime risk of malignancy. Orchiopexy lowers these risks but does not make them disappear, which is why long-term examination remains necessary even after a technically successful repair. The first useful clinical observation is often simple: one hemiscrotum appears smaller or empty compared with the other. The finding is not confirmed by appearance alone. Both testes must be assessed by physical examination, and the result must be documented clearly.