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Urology - Prostate Cancer
Cryosurgery uses liquid nitrogen or argon gas to
freeze and kill prostate cancer cells. Guided by a Trans Rectal Ultra
Sound (TRUS), the doctor places needles in pre-selected locations in
the prostate gland, and then dilates the needle tracks to insert thin,
metal cryoprobes through the skin of the perineum into the prostate.
Liquid nitrogen in the probes forms an ice ball that freezes the
prostate cancer cells. As the cells thaw, they rupture.
cryosurgery, a warming catheter inserted through the penis is intended
to protect the urethra and preserve continence. However, because the
overlying nerve bundles usually freeze, most men who have cryosurgery
become sexually impotent. Moreover, while cryosurgery is less invasive
than radical prostatectomy, doctors know much less about its long-term
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