Jeffrey E. Janis, MD, is on a mission. The professor of plastic surgery, surgery, neurosurgery, and neurology at The Ohio State University Wexner Medical Center, Columbus, Ohio, wants to convince neurologists of the safety and efficacy of nerve decompression surgery for treatment-resistant headache. However, many neurologists remain unconvinced.
“Headache surgery is a viable alternative for complex patients who have failed medical management and who could benefit from this treatment approach. There’s 24 years of evidence behind this surgical technique across hundreds of different studies with different study designs,” Janis told Medscape Medical News.
Yet this treatment approach — surgery on peripheral nerves rather than the brain or spinal cord — hasn’t garnered much support from neurologists. A scan of the agenda of topics at the recently held at the American Headache Society 2024 Annual Meeting showed few if any studies or presentations on this topic. And neurologists Medscape Medical News spoke to said they believe the surgery is experimental and unproven.
Experts do agree drugs don’t work for all patients with migraines. Up to 30% of patients don’t respond to the “laundry list of medications” available to treat the condition, said Janis.
Many patients have also tried, and failed, alternative treatment approaches such as massage, acupuncture, craniosacral therapy, transdermal patches, electrical stimulation, cryoablation, neurostimulation, and radiofrequency ablation.
If nothing else works, is surgery for headaches the answer?
Long-Held Theory
The idea that pinched, irritated, or compressed peripheral nerves can trigger migraine attacks has been around for nearly 25 years. Studies suggest that in addition to migraine, nerve compression can lead to other headache conditions, including occipital neuralgia, supraorbital neuralgia , and posttraumatic headaches.
This has led to the development of surgical techniques to deactivate various compression trigger sites — what Janis calls “pinch points” — which could involve muscles, bone, fascia, blood vessels, or scar tissue from prior trauma or surgery.
The procedure is predominantly performed by plastic surgeons, but to a lesser degree by neurosurgeons and ear, nose, and throat specialists.
Target nerves in surgical interventions include those in the frontal region of the head above the eye, temporal region, neck region, and nasal region. Affected areas are usually identified either through patient self-reports or by using a nerve block agent such as lidocaine or Botox at specific points, Janis noted. If pain subsides after an injection, that location is marked as a target.
One of the barriers to referring complicated patients for surgery is that neurologists evaluating migraine treatments “speak a different language” than surgeons performing the procedure, said Janis.
Neurologists tend to focus on reduction in monthly migraine days (MMD), while surgeons typically use the Migraine Headache Index that incorporates the frequency, intensity, and duration of migraine attacks.
“Rather than try to convince somebody to speak a different language, we thought, why don’t we just learn their language so we can build bridges and take down barriers,” said Janis, coauthor of a systematic review and meta-analysis published online recently in Plastic and Reconstructive Surgery.
Investigators examined 19 studies in the review, including five randomized controlled trials (RCTs), published from January 2020 to September 2023, with a total of 1603 participants who were mostly female and ranged in age from 9 to 72 years. Study follow-ups extended from 6 to 38 months. All but three studies were carried out in the United States, and six different compression sites were addressed during surgery.
Investigators found that across studies and by a number of measures, migraine frequency and severity improved after surgery.
MMD decreased by 36%-92% and the number of overall migraine attacks per month dropped 25%-87.5%. Patients also reported decreases in attack duration of 41%-75% and intensity of 28%-82% across studies.
“Even using the neurologist-standard language of monthly migraine days, this surgery works,” said Janis. “Now this is documented both in the surgical literature and the nonsurgical literature.”
The most common complications were ecchymosis, hair loss or thinning, itching, dryness, and rhinorrhea, all of which Janis described as “fairly minor.” Major complications such as intraoperative bleeding and wound dehiscence were rare, occurring in 1% or less of participants.
‘One And Done?’
These surgeries are usually done on an outpatient basis and generally offer long-term results, Janis said.
“The idea is one and done,” he said. “The literature around this type of surgery says that whatever type of effect you get at 1 year is likely to be permanent.”
The American Society of Plastic Surgeons agrees. A 2018 position paper developed by experts and commissioned by the society reports that the intervention is safe and effective for appropriate patients, based on a comprehensive literature search and review of a large body of peer-reviewed scientific evidence.
“There is substantial, extensively replicated clinical data that demonstrates a significant reduction in MH [migraine headache] symptoms and frequency (even complete elimination of headache pain) following trigger site surgery,” the authors noted.
Pamela Blake, MD, a neurologist, board-certified headache specialist, and medical director at the Headache Center of River Oaks, Houston, is a proponent of what she said can be “lifesaving” headache surgery.
“If a doctor told you that you can either treat this problem with medications that you’ll need to take for the rest of your life or you can have a surgical procedure as an outpatient that has extremely low risk and has, in my experience, a 75% chance of reducing or eliminating your pain, you probably would be interested in surgery,” she told Medscape Medical News.
Continued Skepticism
However, other neurologists and clinicians appear doubtful about this intervention, including Hans-Christoph Diener, MD, PhD, professor of neurology and director, Essen Headache Centre, University of Duisburg-Essen in Germany.
During a debate on the topic a decade ago at the International Headache Congress, Diener argued that, as migraine is a complex multigene-related disorder of the brain, it doesn’t make sense that surgery would affect the epigenetics of 22 different genes.
Recently, he told Medscape Medical News that his views have not changed.
The topic remains controversial, and some neurologists are uncomfortable even openly discussing the procedure. Two clinicians who previously commented on this article later asked not to be included.
One neurologist, who asked to remain anonymous, told Medscape Medical News that Janis’s review article is “merely a review collecting 19 studies over the previous 10 plus years.”
Other limitations cited by this neurologist are the lack of consistency in procedures among the various studies and the inclusion of only four RCTs, the most recent of which was published 8 years ago, suggesting “the study was probably done closer to 9 or 10 years ago,” the neurologist said.
Blake suggested some neurologists’ reluctance could be due to limited background on the procedure, which she said isn’t widely discussed at headache meetings and is covered mostly in plastic surgery journals, not neurology literature. Access to surgery is further limited by a lack of specialists who perform the procedure and inconsistent insurance coverage.
A closer collaboration between neurologists and surgeons who perform the procedure could benefit patients, Blake noted.
“The headache doctor’s role is to identify who’s a candidate for surgery, who meets the criteria for nerve compression, and then follow that patient postoperatively, managing their medications, although usually we get them off their medications,” she added.
From Janis’ perspective, things are starting to change.
“I’m definitely seeing a greater comfort level among neurologists who are understanding where this sits in the algorithm for treatment, especially for complicated patients,” he said.
Janis receives royalties from Thieme and Springer Publishing. Blake reported no relevant conflicts. Diener received research support from the German Research Council; serves on the editorial boards of Cephalalgia, Lancet Neurology, and Drugs; and has received honoraria for participation in clinical trials, contribution to advisory boards, or oral presentations from AbbVie, Lilly, Lundbeck, Novartis, Pfizer, Teva, Weber & Weber, and WebMD.
Source link : https://www.medscape.com/viewarticle/does-headache-surgery-really-work-neurologists-remain-2024a1000eif?src=rss
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Publish date : 2024-08-07 12:30:24
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