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Urethral Cancer - Cancer that begins in the tissues of the urethra. The urethra is the narrow canal which carries urine from the bladder to the outside of the body. In women, the urethra is located in front of the vagina. In men, the urethra is located within the penis. Squamous cell carcinoma (which occurs in flat cells lining the urethra) is the most common form of urethral cancer. Other forms of urethral cancer include transitional cell carcinoma, adenocarcinoma, melanoma, and sarcoma. One of the rarest forms of cancer, urethral cancer is often invasive, and tends to spread to surrounding soft tissue. Urethral cancer occurs more often in women than in men.
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