Mass in the breastIf you’re like most men, you’ve probably never considered the possibility of having breast cancer. In addition, the American Cancer Society identifies several other worrisome signs involving breasts that men, as well as women, should take note of. Changes in the TesticlesTesticular cancer occurs most often in men aged 20 to 39. The American Cancer Society recommends that men get a testicular exam by a doctor as part of a routine cancer-related checkup. But swallowing difficulties may be a sign of a GI cancer, such as cancer of the esophagus.