The peroneal nerve is a branch of the sciatic nerve, which supplies movement and sensation to the lower leg, foot and toes. Common peroneal nerve dysfunction is a type of peripheral neuropathy (damage to nerves outside the brain or spinal cord). This condition can affect people of any age.
There are currently two methods used: One is the digital rectal examination (DRE), in which the examiner inserts a gloved, lubricated finger into the rectum to examine the adjoining prostate. The other is the prostate-specific antigen (PSA) blood test, which measures the concentration of this molecule in the blood.
Dr. Stephenson says the best way to use the new test is not as a replacement of the PSA test. Rather, it is to use the new test as a follow-up to a positive PSA test, but before undergoing a biopsy. Using it this way, physicians can reduce the need for prostate biopsy by 30 to 50 percent.