Almost all testicular cancers start in the germ cells. The two main types of testicular germ cell tumors are seminomas and nonseminomas. These forms of the disease grow and spread differently and are treated differently.
Nonseminomas tend to grow and spread more quickly than seminomas. Seminomas are more sensitive to radiation. A testicular tumor that contains both seminoma and nonseminoma cells is treated as a nonseminoma. Testicular cancer is the most common cancer in men 20 to 35 years old.
Health history can affect the risk of testicular cancer. According to the National Cancer Institute’s Surveillance, Epidemiology, and End Results (SEER) Program estimate, 9,190 men will be diagnosed with testicular cancer in the United States in 2023 and about 470 will die of the disease.Testicular Cancer Screening (PDQ®) Testicular Cancer Treatment (PDQ®)
Source: National Cancer Institute