Definition

Stage I is divided into stages IA, IB, and IS. In stage IA, cancer is found in the testicle, including the rete testis, but has not spread to the blood vessels or lymph vessels in the testicle. All tumor marker levels are normal. In stage IB, cancer (1) is found in the testicle, including the rete testis, and has spread to the blood vessels or lymph vessels in the testicle; or (2) has spread into the hilar soft tissue (tissue made of fibers and fat with blood vessels and lymph vessels), the epididymis, or the outer membranes around the testicle; or (3) has spread to the spermatic cord; or (4) has spread to the scrotum. All tumor marker levels are normal. In stage IS, cancer is found anywhere in the testicle and may have spread into the spermatic cord or scrotum. Tumor marker levels range from slightly above normal to high.