Testicular tumors account for 1% to 2% of male malignant tumors and are divided into primary and secondary types. The vast majority are primary and are divided into two categories: germ cell tumors and non-germ cell tumors. Germ cell tumors occur in the reproductive epithelium of the seminiferous tubules, accounting for 90% to 95% of testicular tumors, of which seminoma is the most common, grows slowly, and generally has a good prognosis; non-seminomas such as embryonal carcinoma, teratoma, choriocarcinoma, etc. are relatively rare, but have a high degree of malignancy, early lymphatic and hematogenous metastasis, and a poor prognosis. Non-germ cell tumors occur in testicular interstitial cells, accounting for 5% to 10%, and are derived from testicular interstitial cells such as fibrous tissue, smooth muscle, blood vessels and lymphatic tissue. Secondary testicular tumors are relatively rare.