In-Depth Review of Symptoms, Triggers, and Treatment of Occipital Migraine Headaches (Site IV):

Preoperative visualization of the greater occipital nerve with magnetic resonance imaging in candidates for occipital nerve decompression for headaches

Occipital nerve decompression is effective in reducing headache symptoms in select patients with migraine and occipital neuralgia. Eligibility for surgery relies on subjective symptoms and responses to nerve blocks and Onabotulinum toxin A (Botox) injections. No validated objective method exists for detecting occipital headache pathologies. The purpose of the study is to explore the potential of high-resolution Magnetic Resolution Imaging (MRI) in identifying greater occipital nerve (GON) pathologies in chronic headache patients. The MRI protocol included three sequences targeting fat-suppressed fluid-sensitive T2-weighted signals. Visualization of the GON involved generating 2-D image slices with sequential rotation to track the nerve course. Twelve patients underwent pre-surgical MRI assessment. MRI identified four main pathologies that were validated against intra-operative examination: GON entanglement by the occipital artery, increased nerve thickness and hyperintensity suggesting inflammation compared to the non-symptomatic contralateral side, early GON branching with rejoining at a distal point, and a connection between the GON and the lesser occipital nerve. MRI possesses the ability to visualize the GON and identify suspected trigger points associated with headache symptoms. This case series highlights MRI's potential to provide objective evidence of nerve pathology. Further research is warranted to establish MRI as a gold standard for diagnosing extracranial contributors in headaches.

Comparing Migraine Headache Index versus Monthly Migraine Days after Headache Surgery: A Systematic Review and Meta-Analysis

BACKGROUND

Nerve deactivation surgery for the treatment of migraine has evolved rapidly over the past 2 decades. Studies typically report changes in migraine frequency (attacks/month), attack duration, attack intensity, and their composite score-the Migraine Headache Index-as primary outcomes. However, the neurology literature predominantly reports migraine prophylaxis outcomes as change in monthly migraine days (MMD). The goal of this study was to foster common communication between plastic surgeons and neurologists by assessing the effect of nerve deactivation surgery on MMD and motivating future studies to include MMD in their reported outcomes.

METHODS

An updated literature search was performed according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines. The National Library of Medicine (PubMed), Scopus, and Embase were systematically searched for relevant articles. Data were extracted and analyzed from studies that met the inclusion criteria.

RESULTS

A total of 19 studies were included. There was a significant overall reduction in MMDs [mean difference (MD), 14.11; 95% CI, 10.95 to 17.27; I 2 = 92%], total migraine attacks per month (MD, 8.65; 95% CI, 7.84 to 9.46; I 2 = 90%), Migraine Headache Index (MD, 76.59; 95% CI, 60.85 to 92.32; I 2 = 98%), migraine attack intensity (MD, 3.84; 95% CI, 3.35 to 4.33; I 2 = 98%), and migraine attack duration (MD, 11.80; 95% CI, 6.44 to 17.16; I 2 = 99%) at follow-up (range, 6 to 38 months).

CONCLUSION

This study demonstrates the efficacy of nerve deactivation surgery on the outcomes used in both the plastic and reconstructive surgery and neurology literature.

Comprehensive Criteria for Differential Diagnosis and a Surgical Management Algorithm for Occipital Neuralgia and Migraine Headaches

The differential diagnoses and nuances of the surgical management of occipital migraine and occipital neuralgia have not been clearly discussed in the available literature. This study aims to highlight additional diagnostic features and offers an algorithm for the surgical treatment of occipital migraine and occipital neuralgia based on the vast experience of the senior author spanning over 23 years. A retrospective cohort study was conducted to review the number and distribution of patients who underwent surgical treatment for occipital migraine headaches and neuralgia and the signs and symptoms observed. Among the 660 patients who underwent surgical treatment for headaches within the territory of the greater occipital nerves, 86 patients underwent isolated deactivation of the greater occipital site (site IV) or combined greater and lesser occipital sites (site IV and site VI surgical). Within the isolated occipital headache group, 43 patients met the criteria for migraine headaches and 43 for occipital neuralgia. Our additional observation on the differences between the occipital neuralgia and migraine groups included that occipital neuralgia is more commonly unilateral, less commonly familial, and more commonly associated with a whiplash-type injury. In addition, the patient with occipital neuralgia can consistently identify the distinct point of pain using the index finger. An ultrasound Doppler signal can also be detected at the pain site and a pulse is often palpable in the site identified by the patient. Occipital neuralgia is also commonly continuous and unrelenting, with occasional spikes of shooting pain, and is less likely to respond to botulinum toxin-A injection. Patients with occipital neuralgia often have a single-site headache while patients with migraine headaches often suffer from headaches in multiple sites. Additional clinical criteria are offered for the differential diagnosis of occipital migraine headaches and occipital neuralgia based on the vast experience of the senior author and the developed surgical management algorithm.

Assessing the Relationship between Obesity and Trigger Point-specific Outcomes after Headache Surgery

Background

Trigger point deactivation surgery is a safe and effective treatment for properly selected patients experiencing migraine, with 68.3%-100% experiencing symptom improvement postoperatively. However, it is still unknown why certain patients do not respond. Obesity has been shown to be associated with worsened migraine symptoms and a decreased response to select pharmacotherapies. This study aimed to determine whether obesity may also be associated with an attenuated response to surgery.

Methods

A retrospective chart review was conducted to identify patients who had undergone trigger point deactivation surgery for migraine. Patients were split into obese and nonobese cohorts. Obesity was classified as a body mass index of 30 or higher per Centers for Disease Control and Prevention guidelines. Outcomes and follow-up periods were determined with respect to individual operations. Outcomes included migraine attack frequency, intensity, duration, and the migraine headache index. Differences in demographics, operative characteristics, and operative outcomes were compared.

Results

A total of 62 patients were included in the study. The obese cohort comprised 31 patients who underwent 45 total operations, and the nonobese cohort comprised 31 patients who underwent 34 operations. Results from multivariable analysis showed no impact of obesity on the odds of achieving a more than 90% reduction in any individual outcome. The overall rates of improvement (≥50% reduction in any outcome) and elimination (100% reduction in all symptoms) across both cohorts were 89.9% and 65.8%, respectively.

Conclusion

Obese patients have outcomes comparable to a nonobese cohort after trigger point deactivation surgery for migraine.

Secondary Trigger Point Deactivation Surgery for Nerve Compression Headaches: A Scoping Review

Background

Primary trigger point deactivation surgery has been successful in reducing or eliminating nerve compression headaches between 79% and 90% of the time. The aim of this review article was to discuss the factors that contribute to index trigger point deactivation surgery failure, the importance of reevaluating trigger points following failure, and the options for secondary surgery.

Methods

A literature search was performed using a combination of keywords involving "chronic headache" and "nerve deactivation surgery," in databases until February 2023.

Results

Data of 1071 patients were evaluated and included (11 articles). The failure rate after index trigger point deactivation surgery occurs is approximately 12%, primarily due to incomplete primary trigger point deactivation. Secondary trigger points may not appear until the primary trigger is eliminated, which occurs in 17.8% of patients. Reevaluation of previously diagnosed trigger points as well as uncovered trigger points and additional preoperative testing is indicated to help determine candidacy for further surgical deactivation. To address scarring that could contribute to failure, corticosteroid injection, acellular dermal matrix, adipofascial fat, or expanded polytetrafluoroethylene sleeves have been described with beneficial effects. For neuroma management, regenerative peripheral nerve interface, targeted muscle reinnervation, a combination of both, relocation nerve grafting, or nerve capping have also been described. Neurectomy can be performed when patients prefer anesthesia and/or paresthesia over current pain symptoms.

Conclusion

Secondary trigger point deactivation surgery is indicated when there is suspicion of incomplete deactivation, internal scarring, neuroma, or newly-diagnosed trigger points.

Outcomes of Surgical Treatment of Migraines: A Systematic Review & Meta-Analysis

Background: Migraine surgery at 1 of 6 identified "trigger sites" of a target cranial sensory nerve has rapidly grown in popularity since 2000. This study summarizes the effect of migraine surgery on headache severity, headache frequency, and the migraine headache index score which is derived by multiplying migraine severity, frequency, and duration. Materials and Methods: This is a PRISMA-compliant systematic review of 5 databases searched from inception through May 2020 and is registered under the PROSPERO ID: CRD42020197085. Clinical trials treating headaches with surgery were included. Risk of bias was assessed in randomized controlled trials. Meta-analyses were performed on outcomes using a random effects model to determine the pooled mean change from baseline and when possible, to compare treatment to control. Results: 18 studies met criteria including 6 randomized controlled trials, 1 controlled clinical trial, and 11 uncontrolled clinical trials treated 1143 patients with pathologies including migraine, occipital migraine, frontal migraine, occipital nerve triggered headache, frontal headache, occipital neuralgia, and cervicogenic headache. Migraine surgery reduced headache frequency at 1 year postoperative by 13.0 days per month as compared to baseline (I2 = 0%), reduced headache severity at 8 weeks to 5 years postoperative by 4.16 points on a 0 to 10 scale as compared to baseline (I2 = 53%), and reduced migraine headache index at 1 to 5 years postoperative by 83.1 points as compared to baseline (I2 = 2%). These meta-analyses are limited by a small number of studies that could be analyzed, including studies with high risk of bias. Conclusion: Migraine surgery provided a clinically and statistically significant reduction in headache frequency, severity, and migraine headache index scores. Additional studies, including randomized controlled trials with low risk-of-bias should be performed to improve the precision of the outcome improvements.

Nerve blocks for occipital headaches: A systematic review and meta-analysis

Migraine surgeons have identified six "trigger sites" where cranial nerve compression may trigger a migraine. This study investigates the change in headache severity and frequency following nerve block of the occipital trigger site. This PRISMA-compliant systematic review of five databases searched from database inception through May 2020 is registered under the PROSPERO ID: CRD42020199369. Only randomized controlled trials utilizing injection treatments for headaches with pain or tenderness in the occipital scalp were included. Pain severity was scored from 0 to 10. Headache frequency was reported as days per week. Included were 12 RCTs treating 586 patients of mean ages ranging from 33.7 to 55.8 years. Meta-analyses of pain severity comparing nerve blocks to baseline showed statistically significant reductions of 2.88 points at 5 to 20 min, 3.74 points at 1 to 6 weeks, and 1.07 points at 12 to 24 weeks. Meta-analyses of pain severity of nerve blocks compared with treatment groups of neurolysis, pulsed radiofrequency, and botulinum toxin type A showed similar headache pain severity at 1 to 2 weeks, and inferior improvements compared with the treatment groups after 2 weeks. Meta-analyses of headache frequency showed statistically significant reductions at 1 to 6-week follow-ups as compared with baseline and at 1 to 6 weeks as compared with inactive control injections. The severity and frequency of occipital headaches are reduced following occipital nerve blocks. This improvement is used to predict the success of migraine surgery. Future research should investigate spinous process injections with longer follow-up.

Minimally Invasive Nerve- and Muscle-Sparing Surgical Decompression for Occipital Neuralgia

BACKGROUND

Occipital neuralgia is a well-defined type of headache, and its treatment algorithm is still debated across medical specialties. From the analysis of the literature, it appears that surgical decompression of the occipital nerves is the most effective invasive approach to improve the quality of life of patients with occipital neuralgia refractory to medications. The authors describe here a minimally invasive nerve- and muscle-sparing technique to decompress the occipital nerves.

METHODS

The results in terms of reduction of migraine days per month, use of medications, pain evaluation, and decrease in Migraine Headache Index were analyzed by means of a retrospective chart review of 87 patients who underwent nerve- and muscle-sparing surgical decompression of the greater and lesser monolateral or bilateral occipital nerves in their institution and were followed up for at least 12 months. The surgical technique is described in detail.

RESULTS

Surgical decompression significantly reduced occipital neuralgia burden (at least 50% improvement) in 91% of patients, with 45% reporting a complete remission of occipital pain. Days with pain per month decreased by 80%, chronic background pain intensity decreased by 81%, and pain intensity during crisis decreased by 76%. Accordingly, drug use dropped by approximately 70%. Only minor complications were reported in four patients.

CONCLUSIONS

The described technique could contribute to and further support surgical decompression as the first option among the invasive approaches to treat occipital neuralgia. Results corroborate previous findings, adding a less-invasive, nerve- and muscle-sparing approach.

CLINICAL QUESTION/LEVEL OF EVIDENCE

Therapeutic, IV.

Migraine Surgery and Determination of Success over Time by Trigger Site: A Systematic Review of the Literature

BACKGROUND

Migraine headache is a debilitating disorder that produces high costs and compromises patient quality of life. This study aimed to evaluate surgery success and the longevity of the surgical benefit by trigger site.

METHODS

A systematic literature review was performed by querying the PubMed, Embase, Scopus, and Web of Science databases. The keywords "surgery," "migraine," "outcomes," "headache index," and synonyms in titles and abstracts were used to perform the search.

RESULTS

A total of 17 articles published between 2009 and 2019 met the inclusion criteria. Six studies were prospective and 11 were retrospective. Most of the studies (77.8%, 77.8%, and 80%, respectively) reported success of migraine surgery at 12-month follow-up for trigger sites I, II, and III, respectively. For trigger site IV, the greatest Migraine Headache Index reduction (93.4%) was observed at 12-month follow-up, and the earliest Migraine Headache Index reductions (80.3% and 74.6%) were observed at 6-month follow-up. All studies that evaluated trigger sites V and VI identified surgery success at 12-month follow-up. Migraine surgery was found to remain beneficial at 22 months for trigger sites I, II, III, and IV.

CONCLUSIONS

The symptomatic improvement may initially be evident at 6 months for trigger site IV and at 12 months for trigger sites I, II, III, V, and VI. Surgical benefit in trigger sites I, II, III, and IV can persist after 22 months. Further studies are required to evaluate results at longer follow-up.

Current Evidence in Migraine Surgery: A Systematic Review

INTRODUCTION

Migraine headache is a widespread neurovascular disorder with an enormous social and economic impact. A subgroup of patients cannot be managed with pharmacological therapy. Although surgical decompression of extracranial sensory nerves has been proposed as a valid alternative treatment option, the medical community remains reluctant to accept it.

MATERIALS AND METHODS

This systematic review was conducted following the Preferred Reporting Items for Systematic Reviews and Meta-analyses guidelines. An electronic search was performed in September 2020 on PubMed, ScienceDirect, CENTRAL, and Google Scholar databases for original articles reporting outcomes on migraine surgery.

RESULTS

The search strategy revealed a total of 922 studies, of which 52 were included in the review. Significant improvement was reported in 58.3% to 100% and complete elimination in 8.3% to 86.8% of patients across studies. No major complications were reported.

DISCUSSION

This systematic review demonstrates that migraine surgery is an effective and safe procedure, with a positive impact in patients' quality of life and a reduction in long-term costs.

CONCLUSION

There is considerable scientific evidence suggesting extracranial migraine surgery is an effective and safe procedure. This surgery should be considered in properly selected migraineurs refractory to medical treatment.

Efficacy and Safety of Migraine Surgery: A Systematic Review and Meta-analysis of Outcomes and Complication Rates

OBJECTIVE

The objectives of this study are to assess the efficacy and safety of peripheral nerve surgery for migraine headaches and to bibliometrically analyze all anatomical studies relevant to migraine surgery.

SUMMARY BACKGROUND DATA

Migraines rank as the second leading cause of disability worldwide. Despite the availability of conservative management options, individuals suffer from refractive migraines which are associated with poor quality of life. Migraine surgery, defined as the peripheral nerve decompression/trigger site deactivation, is a relatively novel treatment strategy for refractory migraines.

METHODS

EMBASE and the National Library of Medicine (PubMed) were systematically searched for relevant articles according to the PRISMA guidelines. Data was extracted from studies which met the inclusion criteria. Pooled analyses were performed to assess complication rates. Meta-analyses were run using the random effects model for overall effects and within subgroup fixed-effect models were used.

RESULTS

A total of 68 studies (38 clinical, 30 anatomical) were included in this review. There was a significant overall reduction in migraine intensity (P < 0.001, SE = 0.22, I2 = 97.9), frequency (P < 0.001, SE = 0.17, I2 = 97.7), duration (P < 0.001, SE = 0.15, I2 = 97), and migraine headache index (MHI, P < 0.001, SE = 0.19, I2 = 97.2) at follow-up. A total of 35 studies reported on migraine improvement (range: 68.3%-100% of participants) and migraine elimination (range: 8.3%-86.5% of participants). 32.1% of participants in the clinical studies reported complications for which the most commonly reported complications being paresthesia and numbness, which was mostly transient, (12.11%) and itching (4.89%).

CONCLUSION

This study demonstrates improved migraine outcomes and an overall decrease in MHI as well as strong evidence for the safety profile and complication rate of migraine surgery.

Decompression of the Greater Occipital Nerve for Occipital Neuralgia and Chronic Occipital Headache Caused by Entrapment of the Greater Occipital Nerve

BACKGROUND

 Chronic entrapment of the greater occipital nerve (GON) can not only manifest in typical stabbing pain of occipital neuralgia (ON) but also lead to continuous ache and pressure-like pain in the occipital and temporal areas. However, the effect of GON decompression on these symptoms has yet to be established. We report the follow-up results of GON decompression in typical cases of ON and chronic occipital headache due to GON entrapment (COHGONE).

METHODS

 A 1-year follow-up study of GON decompression was conducted on 11 patients with typical ON and 39 COHGONE patients with GON entrapment. The degree of pain reduction was analyzed using the numerical rating scale-11 (NRS-11) score and percent pain relief before and 1 year after surgery. A success was defined by at least a 50% reduction in pain measured via NRS-11 during the 12-month follow-up. To assess the degree of subjective satisfaction, a 10-point Likert scale was used. Postoperative outcome was also evaluated using the Barrow Neurological Institute (BNI) pain intensity score. The difference in GON decompression between the patients with typical ON and those with COHGONE was studied.

RESULTS

 GON decompression was successful in 43 of 50 patients (86.0%) and percent pain relief was 72.99 ± 25.53. Subjective improvement based on a 10-point Likert scale was 7.9 ± 2.42 and the BNI grade was 2.06 ± 1.04. It was effective in both the ON and COHGONE groups, but the success rate was higher in the ON group (90.9%) than in the COHGONE group (84.6%), showing statistically significant differences in the results based on average NRS-11 score, percent pain relief, subjective improvement, and BNI grades (p < 0.05, independent t-test).

CONCLUSION

 GON decompression is effective in chronic occipital headache and in ON symptoms induced by GON entrapment.

The Great Auricular Nerve Trigger Site: Anatomy, Compression Point Topography, and Treatment Options for Headache Pain

BACKGROUND

Peripheral nerve decompression surgery can effectively address headache pain caused by compression of peripheral nerves of the head and neck. Despite decompression of known trigger sites, there are a subset of patients with trigger sites centered over the postauricular area coursing. The authors hypothesize that these patients experience primary or residual pain caused by compression of the great auricular nerve.

METHODS

Anatomical dissections were carried out on 16 formalin-fixed cadaveric heads. Possible points of compression along fascia, muscle, and parotid gland were identified. Ultrasound technology was used to confirm these anatomical findings in a living volunteer.

RESULTS

The authors' findings demonstrate that the possible points of compression for the great auricular nerve are at Erb's point (point 1), at the anterior border of the sternocleidomastoid muscle in the dense connective tissue before entry into the parotid gland (point 2), and within its intraparotid course (point 3). The mean topographic measurements were as follows: Erb's point to the mastoid process at 7.32 cm/7.35 (right/left), Erb's point to the angle of the mandible at 6.04 cm/5.89 cm (right/left), and the posterior aspect of the sternocleidomastoid muscle to the mastoid process at 3.88 cm/4.43 cm (right/left). All three possible points of compression could be identified using ultrasound.

CONCLUSIONS

This study identified three possible points of compression of the great auricular nerve that could be decompressed with peripheral nerve decompression surgery: Erb's point (point 1), at the anterior border of the sternocleidomastoid muscle (point 2), and within its intraparotid course (point 3).

A Correlation between Upper Extremity Compressive Neuropathy and Nerve Compression Headache

BACKGROUND

Compressive neuropathies of the head/neck that trigger headaches and entrapment neuropathies of the extremities have traditionally been perceived as separate clinical entities. Given significant overlap in clinical presentation, treatment, and anatomical abnormality, the authors aimed to elucidate the relationship between nerve compression headaches and carpal tunnel syndrome, and other upper extremity compression neuropathies.

METHODS

One hundred thirty-seven patients with nerve compression headaches who underwent surgical nerve deactivation were included. A retrospective chart review was conducted and the prevalence of carpal tunnel syndrome, thoracic outlet syndrome, and cubital tunnel syndrome was recorded. Patients with carpal tunnel syndrome, cubital tunnel syndrome, and thoracic outlet syndrome who had a history of surgery and/or positive imaging findings in addition to confirmed diagnosis were included. Patients with subjective report of carpal tunnel syndrome/thoracic outlet syndrome/cubital tunnel syndrome were excluded. Prevalence was compared to general population data.

RESULTS

The cumulative prevalence of upper extremity neuropathies in patients undergoing surgery for nerve compression headaches was 16.7 percent. The prevalence of carpal tunnel syndrome was 10.2 percent, which is 1.8- to 3.8-fold more common than in the general population. Thoracic outlet syndrome prevalence was 3.6 percent, with no available general population data for comparison. Cubital tunnel syndrome prevalence was comparable between groups.

CONCLUSIONS

The degree of overlap between nerve compression syndromes of the head/neck and upper extremity suggests that peripheral nerve surgeons should be aware of this correlation and screen affected patients comprehensively. Similar patient presentation, treatment, and anatomical basis of nerve compression make either amenable to treatment by nerve surgeons, and treatment of both entities should be an integral part of a formal peripheral nerve surgery curriculum.

Trigger-Site Deactivation Surgery for Nerve Compression Headaches

LEARNING OBJECTIVES

After studying this article, the participant should be able to: 1. Identify patients who are candidates for headache surgery. 2. Counsel the patient preoperatively with regard to success rates, recovery, and complications. 3. Develop a surgical plan for primary and secondary nerve decompression. 4. Understand the surgical anatomy at all trigger sites. 5. Select appropriate International Classification of Diseases, Tenth Revision, and CPT codes.

SUMMARY

Headache surgery encompasses release of extracranial peripheral sensory nerves at seven sites. Keys to successful surgery include correct patient selection, detailed patient counseling, and meticulous surgical technique. This article is a practical step-by-step guide, from preoperative assessment to surgery and postoperative recovery. International Classification of Diseases, Tenth Revision, and CPT codes, in addition to complications and salvage procedures, are discussed. Intraoperative photographs, videos, and screening questionnaires are provided.

The Evolution of Migraine Surgery: Two Decades of Continual Research. My Current Thoughts

SUMMARY

A mere serendipitous finding has culminated in a life-changing development for patients and a colossally fulfilling field for many surgeons. The surgical treatment of migraine headaches has been embraced by many plastic surgeons after numerous investigations ensuring that the risks are minimal and the rewards inestimable. Seldom has a plastic surgery procedure been the subject of such scrutiny. Through retrospective, prospective pilot, prospective randomized, prospective randomized with sham surgery, and 5-year follow-up studies, the safety, efficacy, and longevity of the given operation have been confirmed. Although the first decade of this journey was focused on investigating effectiveness and risk profile, the second decade was largely devoted to improving results, reducing invasiveness, and shortening recovery. Multiple publications in peer-reviewed journals over the past 20 years, several independent studies from reputable surgeons at recognized centers, and over 40 studies from the author's center have established the surgical treatment of headaches as a standard practice.

Peripheral Occipital Nerve Decompression Surgery in Migraine Headache

Migraine headache in the occipital region is characterized by a recurrent pain of moderate to severe intensity. However, the diagnosis can be difficult because of the multitude of symptoms overlapping with similar disorders and a pathophysiology that is not well-understood. For this reason, the medical management is often complex and ineffective.

Patient Pain Sketches Can Predict Surgical Outcomes in Trigger-Site Deactivation Surgery for Headaches

BACKGROUND

Patient selection for headache surgery is an important variable to ensure successful outcomes. In the authors' experience, a valuable method to visualize pain/trigger sites is to ask patients to draw their pain. The authors have found that there are pathognomonic pain patterns for each site, and typically do not operate on patients with atypical pain sketches, as they believe such patients are poor surgical candidates. However, a small subset of these atypical patients undergo surgery based on other strong clinical findings. In this study, the authors attempt to quantify this clinical experience.

METHODS

Patients were prospectively enrolled and completed pain sketches at screening. One hundred six diagrams were analyzed/categorized by two independent, blinded reviewers as follows: (1) typical (pain over nerve distribution, expected radiation); (2) intermediate (pain over nerve distribution, atypical radiation); or (3) atypical (pain outside of normal nerve distribution, atypical radiation). Preoperative and postoperative Migraine Headache Index was compared between subgroups using unpaired t tests.

RESULTS

Migraine Headache Index improvement was 73 ± 38 percent in the typical group, 78 ± 30 percent in the intermediate group, and 30 ± 40 percent in the atypical group. There was a significant difference in Migraine Headache Index between the typical and atypical groups (p = 0.03) and between the intermediate and atypical groups (p < 0.01). The chance of achieving Migraine Headache Index improvement greater than 30 percent in the atypical group was 20 percent.

CONCLUSIONS

Patient pain sketches classified as atypical (facial pain, atypical pain point origin, diffuse pain) can predict poor outcomes in headache surgery. As the authors continue to develop patient selection criteria for headache surgery, patient sketches should be considered as an effective, cheap, and simple-to-interpret tool for selecting candidates for surgery.

A Comprehensive Review of Surgical Treatment of Migraine Surgery Safety and Efficacy

BACKGROUND

Recent clinical experience with migraine surgery has demonstrated both the safety and the efficacy of operative decompression of the peripheral nerves in the face, head, and neck for the alleviation of migraine symptoms. Because of the perceived novelty of these procedures, and the paranoia surrounding a theoretical loss of clinical territory, neurologists have condemned the field of migraine surgery. The Patient Safety Subcommittee of the American Society of Plastic Surgeons ventured to investigate the published safety track record of migraine surgery in the existing body of literature.

METHODS

A comprehensive review of the relevant published literature was performed. The relevant databases and literature libraries were reviewed from the date of their inception through early 2018. These articles were reviewed and their findings analyzed.

RESULTS

Thirty-nine published articles were found that demonstrated a substantial, extensively replicated body of data that demonstrate a significant reduction in migraine headache symptoms and frequency (even complete elimination of headache pain) following trigger-site surgery.

CONCLUSIONS

Migraine surgery is a valid method of treatment for migraine sufferers when performed by experienced plastic surgeons following a methodical protocol. These operations are associated with a high level of safety. The safety and efficacy of migraine surgery should be recognized by plastic surgeons, insurance companies, and the neurology societies.

Trigger Site Inactivation for the Surgical Therapy of Occipital Migraine and Tension-type Headache: Our Experience and Review of the Literature

Literature from the last decade has shown a correlation between resection of the occipital muscles and vessels and relief from migraine and tension-type headaches.

The Cutting Edge of Headache Surgery: A Systematic Review on the Value of Extracranial Surgery in the Treatment of Chronic Headache

BACKGROUND

Migraine is a debilitating neurologic condition, with a large socioeconomic impact. There is a subgroup of patients that does not adequately respond to pharmacologic management and may have underlying neuralgia. Surgical decompression of extracranial sensory nerves has been proposed as an alternative therapy. The aim of this article is to review the evidence for the surgical treatment of neuralgias.

METHODS

A systematic review was conducted to study the efficacy of decompression of extracranial sensory nerves as a treatment for neuralgia. Clinical studies were included that studied patients, aged 18 years or older, diagnosed with any definition of headache and were treated with extracranial nerve decompression surgery. Outcome parameters included intensity (on a 10-point scale), duration (in days), and frequency (of headaches per month).

RESULTS

Thirty-eight articles were found describing extracranial nerve decompression in patients with headaches. Postoperative decrease in headache intensity ranged from 2 to 8.2, reduction of duration ranged from 0.04 to 1.04 days, and reduction in frequency ranged between 4 and 14.8 headaches per month. Total elimination of symptoms was achieved in 8.3 to 83 percent of cases. A detailed summary of the outcome of single-site decompression is described. Statistical pooling and therefore meta-analysis was not possible, because of articles having the same surgeon and an overlapping patient database.

CONCLUSIONS

Nerve decompression surgery is an effective way of treating headaches in a specific population of patients with neuralgia. Although a meta-analysis of the current data was not possible, the extracranial decompression of peripheral head and neck sensory nerves has a high success rate.

Migraine Surgery

Supplemental Digital Content is available in the text.

This article is a practical and technical guide for plastic surgeons interested in or practicing migraine surgery. It discusses the goals of migraine surgery including selection of appropriate candidates (screening form contained), pertinent anatomy, and surgical techniques with text summary, intraoperative photographs, and videos. In addition, pearls and pitfalls, the most common complications, and current procedural terminology (CPT) coding are detailed.

Alternative Approach for Occipital Headache Surgery: The Use of a Transverse Incision and "W" Flaps

The most commonly used approach for a greater occipital nerve decompression is through a vertical midline incision, with multiple authors reporting favorable long-term outcomes. A transverse approach to the occipital nerves has been described, yet it does not include the use of fat flaps to insulate the decompressed nerves. In this study, we describe the use of a single transverse incision with modified “W” fat flaps to decompress both the greater and lesser occipital nerves. This allows for wider exposure of the nerves without the need for an additional incision to access the lesser occipital nerve. The described technique provides increased reach and versatility of the fat flap, allowing for coverage over a longer course of the nerve and further cephalad, close to the bony skull base. In addition, the fat flaps cover the greater occipital nerve closer to its native position, as opposed to bringing the nerve into a subcutaneous position. This, theoretically, keeps the nerve in a more protected deep position and technically makes it easier to avoid any tendency for kinking the nerves while wrapping them with the fat flap. Our experience has demonstrated that this modified technique is not only safe but also efficacious in affecting a statistically significant reduction (70% improvement, P = 0.004) in migraine headache index and HIT-6 scores. This study provides further evidence that nerve decompression for headache following the principles described by Guyuron is an efficacious and reproducible procedure and that a proper nerve decompression is effective in reducing headache.

Surgical Treatment of Migraine Headache: Back to the Future

Understanding the history and evolution of ideas is key to developing an understanding of complex phenomena and is the foundation for surgical innovation. This historical review on migraine surgery takes us back to the beginnings of interventional management for migraine centuries ago, and reflects on present practices to highlight how far we have come. From Al-Zahrawi and Ambroise Paré to Bahman Guyuron, two common themes of the past and present have emerged in the treatment of migraine headache. Extracranial treatment of both nerves and vessels is being performed and analyzed, with no consensus among current practitioners as to which structure is involved. Knowledge of past theories and new insights will help guide our efforts in the future. One thing is clear: Where we are going, there are no roads. At least not yet.

Surgical intervention for chronic migraine headache: A systematic review

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A focus on sound systematic review methodology to present an unbiased and scientific assessment of the body of knowledge for migraine surgery.

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Comprehensive search strategy included a range of study types to capture all relevant reports of primary clinical research, enabling a global evaluation of the topic.

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A descriptive analysis allowing an overview of the likely effect of a variety of surgical interventions, with a snapshot of the rates of recurrence and adverse events.

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Formalised assessment of methodological quality using the GRADE approach identifies specific flaws affecting the reliability of migraine surgery research to date.

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Limited by a paucity of methodological quality in included studies, heterogeneous interventions, inconsistent outcome reporting and variability in baseline data, intervention data and outcome data.

Aims

Migraine is a global phenomenon, affecting more than 10% of the world's population. It is characterized by unilateral headache that may be accompanied by vomiting, nausea, photophobia and phonophobia. Some patients with chronic migraine respond to extra-cranial botulinum toxin type A injection, although the benefits observed are temporary. The rationale for surgical trigger site deactivation is to achieve lasting symptomatic improvement or permanent relief from migraine.

Methods

We performed a PRISMA-compliant systematic review of clinical studies evaluating surgical intervention for migraine by searching Ovid MEDLINE and EMBASE databases from inception to June 2017. Studies were independently screened by two authors. Data were extracted on study characteristics, migraine outcomes, adverse events and recurrence. The quality of evidence was assessed using the GRADE approach. The review protocol was prospectively registered on the PROSPERO database (CRD42017068577).

Results

The search strategy identified 789 articles; of them, 18 studies (4 RCTs and 14 case series) were eligible for analysis. Surgical interventions were heterogeneous and variably involved peripheral nerve decompression by myectomy or foraminotomy, nerve excision, artery resection and/or nasal surgery. All studies reported significant reductions in migraine intensity, frequency, duration and composite headache scores following surgery. Study heterogeneity precluded formal meta-analysis. Where reported, adverse event rates varied markedly between studies. The quality of included studies was consistently low or very low.

Conclusion

There is insufficient evidence to support the effectiveness of any specific surgical intervention for chronic migraine, especially with regard to permanent relief; however, all included studies report improvements in key outcomes following migraine surgery. A definitive, well-powered RCT with objective surgical and patient-reported outcome measures and robust adverse event reporting is required.

Tracking patients with chronic occipital headache after occipital nerve decompression surgery: A case series

BACKGROUND

The therapeutic benefit of nerve decompression surgeries for chronic headache/migraine are controversial.

AIM

To provide clinical characteristics of headache type and treatment outcome of occipital nerve decompression surgery.

METHODS

A retrospective review of clinical records. Inclusion criteria were evidence of chronic occipital headache with and without migrainous features and tenderness of neck muscles, occipital allodynia, and inadequate response to prophylactic drugs.

RESULTS

Surgical decompression of the greater and lesser occipital nerves provided complete and extended (3-6 years) relief of new daily persistent headache in case 3 (46 year old female), and of chronic post-traumatic headache in cases 4 and 6 (35 and 30 year old females, respectively), partial relief of chronic headache/migraine in cases 1 and 2 (41 year old female and 36 year old male), and no relief of episodic (cases 3 and 4) or chronic migraine (case 5, 52 year old male), or chronic tension-type headache (case 7, 31 year old male).

CONCLUSIONS

As a case series, this study cannot test a hypothesis or determine cause and effect. However, the complete elimination of new daily persistent headache and post-traumatic headache, and the partial elimination of chronic headache/migraine in two patients - all refractory to other treatment approaches - supports and justifies the effort to continue to generate data that can help determine whether decompression nerve surgeries are beneficial in the treatment of certain types of chronic headache.