Each year about 9,000 men in the U.S. are diagnosed with testicular cancer. Most are under age 35, though the disease can affect boys and men at any age. Fred Hutchinson Cancer Center offers ...

When doctors can detect it early, testicular cancer is usually highly treatable. Yet not everyone may know the importance of self-exams for this type of cancer. Cancer and health organizations aim to ...

Most people with a penis have two testicles in their scrotum — but some only have one. This is known as monorchism. Monorchism can be the result of several things. Some people are simply born with ...

You might not know it, but this month is testicular cancer awareness month, which seeks to try and raise awareness about the disease. The rest of this article is behind a paywall. Please sign in or ...

Dominant male lemurs flexibly grow their testicles when other males are around, putting them in a better position to successfully mate. In many species, dominant males have larger testes than ...