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Inflammation Causes Some Post-surgical Neuropathies

  • Published: 2010-09-23 (Revised/Updated 2018-03-16) : Press Release by Mayo Clinic
  • Synopsis: Nerve inflammation may cause pain numbness and weakness following surgical procedures that is known as postsurgical neuropathy.

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"This is exciting for patients because it allows for appropriate identification and accurate treatment of post-surgical neuropathy."

Mayo Clinic finds inflammation causes some post-surgical neuropathies - For these patients, immunotherapy can quickly improve symptoms.

A new Mayo Clinic study found that nerve inflammation may cause the pain, numbness and weakness following surgical procedures that is known as post-surgical neuropathy.

The development of post-surgical neuropathies is typically attributed to compression or stretching of nerves during surgery. This new research shows that, in some cases, the neuropathy is actually caused by the immune system attacking the nerves and is potentially treatable with immunosuppressive drugs. The study was published in this month's issue of Brain.

Post-surgical neuropathy is an uncommon complication of surgery.

Peripheral nerves are the extensive network of nerves that link the brain and spinal cord (the central nervous system) to all other parts of the body. When damaged by stretching, compression or inflammation, the peripheral nerve injury can interfere with communication between the brain and the rest of the body (muscles and sensation are controlled by the nerve). Individuals with post-surgical neuropathy may experience loss of sensation, pain and muscles weakness.

"It is important that a person with post-surgical inflammatory neuropathy receive a diagnosis and treatment quickly. Understanding the role of inflammation in these patients' neuropathy can lead to appropriate immunotherapy and improvement of neurological symptoms and impairments," says P. James Dyck, M.D., a Mayo Clinic neurologist and senior author of this study.

As part of the research, Dr. Dyck and a team of Mayo Clinic researchers selected 23 patients who developed neuropathy within 30 days of a surgical procedure.

According to Dr. Dyck, the neuropathy of these 23 patients did not make sense in terms of being caused by stretching or compression because the nerves damaged were usually in a different part of the body from the surgical site or the neuropathy occurred at least a few days after the surgery was over. The surgical procedures were orthopedic, abdominal, chest or dental. All the patients received a nerve biopsy, of which 21 demonstrated increased inflammation. Seventeen patients were treated over a three-month period with immunotherapy, and in all cases with follow-up the neuropathy impairments improved.

"This is exciting for patients because it allows for appropriate identification and accurate treatment of post-surgical neuropathy. Without showing inflammation on the nerve biopsies, we would have been unable to know the cause of the neuropathy," says Nathan Staff, M.D., Ph.D., a Mayo Clinic neurologist and the first author of this study.

"It is logical for patients to believe that it was the surgeon's fault that they developed a neuropathy because it occurred after the surgery," says Dr Dyck. "However, in these cases, we have strong evidence that the neuropathies were not the surgeon's fault but were caused by the immune system attacking the nerves."

Other members of the Mayo Clinic research team included JaNean Engelstad, Christopher Klein, M.D., Kimberly Amrami, M.D., Robert Spinner, M.D., Peter Dyck, M.D., Mark Warner, M.D., and Mary Warner, M.D.

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