April is Testicular Cancer Awareness Month. Testicular cancer also known as testis cancer is one of the most common cancers among men aged 15-34, but it can affect males of any age, including infants and elderly men. Most types of testicular cancer develop in the sperm-producing cells known as germ cells. These germ cell tumors are divided into seminomas, and the faster growing non-seminomas. Men who notice a lump, hardness, enlargement or any other change in one or both of their testicles or experience pain during their monthly self-examination should visit their doctor immediately. Unfortunately, some testicular cancers may not cause symptoms and may go undetected until they have spread to other parts of the body. With prompt diagnosis and treatment testicular cancer is almost always curable.