The exact cause of this disease is unknown. However, research does show that some men are more likely than others to develop testicular cancer. Possible risk factors include the following:
- Cryptorchidism - undescended testicle(s)
- Family history
- Personal history of cancer in the other testicle
- Race and ethnicity
- HIV infection
Most testicular cancers occur in men between the ages of 20 and 54. The rate of testicular cancer is higher in Caucasians than in other populations.