The incidence of testicular malignancy in normal people is 1:100,000, while the incidence of malignancy in patients with cryptorchidism is 1:2,500, which is 40 times that of normal people. The incidence of malignant changes in cryptorchidism is 4-6 times higher than that in the inguinal cavity and other parts of the body, and patients with cryptorchidism are recommended to undergo bilateral testicular descending fixation as soon as possible. It is advisable to perform testicular fixation around 2 years old.