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Impotence results when the line of communication is disrupted between the brain – your primary sex organ – and your penis. Sexual desire is born in the brain, which then orders the penis to fill itself with blood and create an erection.
Unfortunately, the line of communication between brain and groin runs past the prostate. Prostate-cancer treatment, whether surgical or non-surgical, often damages or destroys the nearby nerves, thus blocking communications. If the order doesn’t get through, the erection doesn’t occur.
Non-surgical treatments, such as radioactive seeds (brachiatherapy), and cryotherapy (freezing the tumor) decrease the likelihood of ED. Surgical techniques, such as the so-called nerve-sparing technique, improve chances of post-surgery sexual function. Robotic surgery offers a level of precision that may enable the surgeon to zap the cancer cells without zapping the nerve cells. But not all cancer patients are candidates for these methods, and there’s no guarantee that the patient will return to full sexual function.