These cells begin to change and grow uncontrollably, forming a mass or tumor. The cells can also invade the blood stream and lymph system and spread, leading to tumors in other areas of the body called metastases. Most often testicular cancer is detected as a painless lump in one of the testicles.
Seminoma is a slow-growing form of testicular cancer which is most often found in. Sometimes these symptoms can be caused by other problems, such as a .