Pain Examination and Diagnosis

The Efficacy of Upper Extremity Neuroma Surgery in Reducing Long-Term Opioid Use in Patients with Preoperative Opioid Use

Neuromas can cause severe neuropathic pain, leading to functional decline and psychosocial distress. For pain relief, patients refractory to medications for neuropathic pain may be prescribed opioids; however, such use has been shown to have unfortunate adverse effects. With increasing awareness and diagnostic capabilities for neuroma formation, this study evaluates whether upper extremity neuroma excision may reduce opioid use and if adjunctive nerve procedures further reduce opioid use.The PearlDiver database was queried for patients undergoing upper extremity neuroma excision surgery from 2010 to 2020. Patients with opioid prescription fill records preoperatively were extracted and stratified by an operative technique involving either (1) excision alone, (2) nerve implantation into bone or muscle, or (3) nerve reconstruction. Records were then assessed at 1, 3, and 6 months postoperatively to assess for opioid use. Prescription fill rates at 1, 3, and 6 months postoperatively were then assessed across techniques.Of the 14,330 patients that underwent upper extremity neuroma excision, 4,156 filled opioids preoperatively. Excision led to significant reductions in opioid prescription fill rates postoperatively, decreasing to 67.4% at 1 month and to 57.5% by 6 months (p < 0.001). Excision alone resulted in lower opioid use compared with excision with implantation at all postoperative time points (p < 0.05). At 6 months, opioid use was also significantly less following excision with nerve reconstruction compared with implantation (56.4% vs. 65.6%, p = 0.0096). There were no differences between excision alone and excision with nerve reconstruction.Neuroma excision significantly reduces opioid use in patients with preoperative opioid use while adjunctive operative techniques did not potentiate opioid reduction. This highlights the importance of understanding patient complaints, neuroma localization, and candidacy for excision as an effective measure for addressing opioid use in patients with preoperative opioid dependence.

The Recurrence of Painful Neuromas of the Limbs Following TMR

Background/Objectives: Neuropathic pain associated with neuromas is a complex clinical problem to treat. Targeted Muscle Reinnervation (TMR) has been demonstrated to treat pain both as a prophylactic procedure in amputated patients and in patients affected by painful neuromas. It is not clear what its role could be in chronic situations: the literature reports amazing results but also unsuccessful pain relief. Methods: A retrospective analysis was conducted on patients treated with TMR for long-lasting painful neuromas in the upper and lower limbs. Following a clinical and instrumental diagnosis, all patients responded positively to a local anesthetic block. During follow-up visits, the NRS and DN4 questionnaires were used to assess improvement in pain. Results: Three patients were included in this study. TMR was performed 45 months after trauma. Two TMRs involved nerves of the upper extremity, in one case, the tibial nerve. The recipient muscles were the second lumbricalis, pronator quadratus, and flexor digitorum longus of the foot. After surgery, pain decreased for 3 months, but patients experienced a relapse that returned to levels close to the pre-operative period. The types of pain, as reported in DN4 questionnaire, changed slightly compared to those in the pre-surgical period. Follow-up ranged between 12 and 19 months. Conclusions: This small series collected the results of TMR in patients affected by long-lasting symptomatic neuromas in the upper and lower extremities. Despite what is published in other series, this procedure reduced pain for up to 6 months. At final follow-up, the type of pain changed slightly as reported in the DN4 questionnaire, and pain scores reduced by just one point as shown by the NRS. Our experience suggests that TMR might have a slight effect on long-lasting painful neuromas and in these cases, only short-term pain relief could be expected. This suggests using TMR as close as possible to the trauma in order to increase the chances of relieving pain.

[Neuropathic Pain - Differential Diagnosis and Treatment from the Hand Surgeon's Perspective]

Neuropathic Pain - Differential Diagnosis and Treatment from the Hand Surgeon's Perspective Abstract. Neuropathic pain of the wrist and hand can be caused by a multitude of pathologies, such as trauma, iatrogenic damage, local peripheral nerve compression, nerve tumors and systemic diseases. Neuropathic pain can lead to chronification and disability, severely affecting the patients' quality of life and the ability to work. A precise diagnosis is the key to an adequate therapy with satisfactory functional results. An interdisciplinary and multimodal approach is a prerequisite when treating neuropathic pain. This review article provides an insight into the diagnosis and therapy of pathologies associated with neuropathic pain of the wrist and hand.

Diagnostic Criteria for Symptomatic Neuroma

INTRODUCTION

After nerve injury, disorganized or incomplete nerve regeneration may result in a neuroma. The true incidence of symptomatic neuroma is unknown, and the diagnosis has traditionally been made based on patient history, symptoms, physical examination, and the anatomic location of pain, along with response to diagnostic injection. There are no formally accepted criteria for a diagnosis of neuroma.

MATERIALS AND METHODS

A literature search was performed to identify articles related to neuroma: Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines were followed and Pubmed, Embase, and the Cochrane Library were searched for all relevant articles pertaining to neuroma. Articles were screened by title and abstract for relevance. If an article was considered potentially relevant, the full article was reviewed. After consideration, 50 articles were included in this systematic review.

RESULTS

No previous articles directly addressed diagnostic criteria for symptomatic neuroma. Factors related to neuroma diagnosis gleaned from previous studies include pain and cold intolerance (patient history), positive Tinel sign or diminished 2-point discrimination (physical examination findings), response to diagnostic nerve block, and presence of neuroma on diagnostic imaging (ultrasound or magnetic resonance imaging). Based on literature review, the importance and number of references, as well as clinical experience, we propose criteria for diagnosis of symptomatic neuroma. To receive a diagnosis of symptomatic neuroma, patients must have (1) pain with at least 3 qualifying "neuropathic" characteristics, (2) symptoms in a defined neural anatomic distribution, and (3) a history of a nerve injury or suspected nerve injury. In addition, patients must have at least 2 of the following 4 findings: (1) positive Tinel sign on examination at/along suspected nerve injury site, (2) tenderness/pain on examination at/along suspected nerve injury site, (3) positive response to a diagnostic local anesthetic injection, and (4) ultrasound or magnetic resonance imaging confirmation of neuroma.

CONCLUSIONS

The diagnosis of neuroma is based on a careful history and physical examination and should rely on the proposed criteria for confirmation. These criteria will be helpful in more precisely defining the diagnosis for clinical and research purposes.

The Role of the Peripheral Nerve Surgeon in the Treatment of Pain

Pain is a frequent cause of physician visits. Many physicians find these patients challenging because they often have complicated histories, emotional comorbidities, confusing examinations, difficult problems to fix, and the possibility of factitious complaints for attention or narcotic pain medications. As a result, many patients are lumped into the category of chronic, centralized pain and relegated to pain management. However, recent literature suggests that surgical management of carefully diagnosed generators of pain can greatly reduce patients' pain and narcotic requirements. This article reviews recent literature on surgical management of pain and four specific sources of chronic pain amenable to surgical treatment: painful neuroma, nerve compression, myofascial/musculoskeletal pain, and complex regional pain syndrome type II.

Surgical Algorithm for Neuroma Management: A Changing Treatment Paradigm

Successful treatment of the painful neuroma is a particular challenge to the nerve surgeon. Historically, symptomatic neuromas have primarily been treated with excision and implantation techniques, which are inherently passive and do not address the terminal end of the nerve. Over the past decade, the surgical management of neuromas has undergone a paradigm shift synchronous with the development of contemporary techniques aiming to satisfy the nerve end. In this article, we describe the important features of surgical treatment, including the approach to diagnosis with consideration of neuroma type and the decision of partial versus complete neuroma excision. A comprehensive list of the available surgical techniques for management following neuroma excision is presented, the choice of which is often predicated upon the availability of the terminal nerve end for reconstruction. Techniques for neuroma reconstruction in the presence of an intact terminal nerve end include hollow tube reconstruction and auto- or allograft nerve reconstruction. Techniques for neuroma management in the absence of an intact or identifiable terminal nerve end include submuscular or interosseous implantation, centro-central neurorrhaphy, relocation nerve grafting, nerve cap placement, use of regenerative peripheral nerve interface, "end-to-side" neurorrhaphy, and targeted muscle reinnervation. These techniques can be further categorized into passive/ablative and active/reconstructive modalities. The nerve surgeon must be aware of available treatment options and should carefully choose the most appropriate intervention for each patient. Comparative studies are lacking and will be necessary in the future to determine the relative effectiveness of each technique.

Surgical Algorithm for Neuroma Management: A Changing Treatment Paradigm

Successful treatment of the painful neuroma is a particular challenge to the nerve surgeon. Historically, symptomatic neuromas have primarily been treated with excision and implantation techniques, which are inherently passive and do not address the terminal end of the nerve. Over the past decade, the surgical management of neuromas has undergone a paradigm shift synchronous with the development of contemporary techniques aiming to satisfy the nerve end. In this article, we describe the important features of surgical treatment, including the approach to diagnosis with consideration of neuroma type and the decision of partial versus complete neuroma excision. A comprehensive list of the available surgical techniques for management following neuroma excision is presented, the choice of which is often predicated upon the availability of the terminal nerve end for reconstruction. Techniques for neuroma reconstruction in the presence of an intact terminal nerve end include hollow tube reconstruction and auto- or allograft nerve reconstruction. Techniques for neuroma management in the absence of an intact or identifiable terminal nerve end include submuscular or interosseous implantation, centro-central neurorrhaphy, relocation nerve grafting, nerve cap placement, use of regenerative peripheral nerve interface, “end-to-side” neurorrhaphy, and targeted muscle reinnervation. These techniques can be further categorized into passive/ablative and active/reconstructive modalities. The nerve surgeon must be aware of available treatment options and should carefully choose the most appropriate intervention for each patient. Comparative studies are lacking and will be necessary in the future to determine the relative effectiveness of each technique.