An estimated 20 million people in the United States suffer from peripheral neuropathy, marked by the degeneration of nerves and in some cases severe pain. There is no good treatment for the disorder and in one third of the cases, doctors have not been able to find an apparent cause.
Now, a new study, published online June 22 in the Annals of Neurology, has found that mutations of a single gene are linked to 30 percent of unexplained neuropathy cases. These findings could lead to desperately...

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