Most often, men notice a painless swelling or hardening of a testicle. It may be hard on one side, but not the other. Sometimes, men notice a painful lump in the scrotum.
Men also may notice breast enlargement. Rarely, a milky fluid may come out of the nipple. These two symptoms occur when the tumor affects the secretion of male hormones.
Less common symptoms include
a lump in the neck
back pain that doesn't go away
shortness of breath
coughing up blood.
These less common symptoms tend to appear after the cancer has spread to other parts of the body.