The urethra is a tube that carries urine from the bladder, so it can exit the body. In men, it’s about eight inches long, and travels through the prostate on its way through the penis. In women, this tube is about 1.5 inches long before terminating just above the vagina. Urethral cancer is rare, and it occurs in women more often than men. This cancer is aggressive and can spread to nearby lymph nodes and other parts of the body quickly.