821 results match your criteria Erythromelalgia


Resilience to Pain: A Peripheral Component Identified using induced Pluripotent Stem Cells and Dynamic Clamp.

J Neurosci 2018 Nov 20. Epub 2018 Nov 20.

Department of Neurology; Yale University, New Haven, CT

Pain is a complex process that involves both detection in the peripheral nervous system and perception in the central nervous system. Individual-to-individual differences in pain are well-documented, but not well-understood. Here we capitalized on inherited erythromelalgia (IEM), a well-characterized human genetic model of chronic pain, and studied a unique family containing related IEM subjects with the same disease-causing Nav1. Read More

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November 2018
1 Read
6.340 Impact Factor

Thermoregulation in neuropathies.

Authors:
Robert D Fealey

Handb Clin Neurol 2018 ;157:777-787

Department of Neurology, Mayo Clinic, Rochester, MN, United States. Electronic address:

Peripheral neuropathy affecting autonomic and small sensory fibers can cause abnormalities of both autonomic and behavioral thermoregulation. Quantitative autonomic and sensory neurophysiologic tests and quantification of the linear density of intraepidermal nerve fibers potentially can stratify those at risk of impaired thermoregulation during cold and heat challenges. New data relating to thermoregulatory sweating impairment in neuropathy are presented in this chapter. Read More

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January 2018
7 Reads

Pediatric Erythromelalgia and SCN9A Mutations: Systematic Review and Single-Center Case Series.

J Pediatr 2018 Nov 9. Epub 2018 Nov 9.

Clinical Neurosciences (Pediatric Pain Research Group), UCL GOS Institute of Child Health, London, UK; Department of Pediatric Anesthesia and Pain Medicine, Great Ormond Street Hospital NHS Foundation Trust, London, UK. Electronic address:

Objectives: To evaluate the clinical features of erythromelalgia in childhood associated with gain-of-function SCN9A mutations that increase activity of the Na1.7 voltage-gated sodium channel, we conducted a systematic review of pediatric presentations of erythromelalgia related to SCN9A mutations, and compared pediatric clinical presentations of symptomatic erythromelalgia, with or without SCN9A mutations.

Study Design: PubMed, Embase, and PsycINFO Databases were searched for reports of inherited erythromelalgia in childhood. Read More

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November 2018
11 Reads

Insensitivity to Pain upon Adult-Onset Deletion of Nav1.7 or Its Blockade with Selective Inhibitors.

J Neurosci 2018 Nov 9;38(47):10180-10201. Epub 2018 Oct 9.

Departments of Neuroscience,

Strong human genetic evidence points to an essential contribution of the voltage-gated sodium channel Nav1.7 to pain sensation: loss of Nav1.7 function leads to congenital insensitivity to pain, whereas gain-of-function mutations in the gene that encodes Nav1. Read More

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November 2018
8 Reads

Erythromelalgia and Peripheral Nerve Block: A Case Report.

A A Pract 2018 Oct 3. Epub 2018 Oct 3.

From the Department of Anesthesia and Pain Medicine, Toronto Western Hospital, University Health Network, Toronto, Ontario, Canada.

A 79-year-old woman with primary erythromelalgia underwent a left reverse total shoulder arthroplasty with a left interscalene nerve block, a superficial cervical plexus block, and a general endotracheal anesthetic, with no residual neurological deficits. Herein, we discuss the classification and pathophysiology of erythromelalgia along with the anesthetic considerations of peripheral nerve blockade in patients with primary erythromelalgia. Read More

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October 2018
15 Reads

Current pain management strategies for patients with erythromelalgia: a critical review.

J Pain Res 2018 30;11:1689-1698. Epub 2018 Aug 30.

Seattle Children's Research Institute, Seattle, WA, USA,

Erythromelalgia (EM) is a rare disorder characterized by erythematous, warm, painful extremities, which is often precipitated by cold conditions. The pathophysiology of EM is incompletely understood. Recent investigations have identified sodium channelopathy as a genetic cause for this pain condition, classified as primary inherited EM. Read More

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August 2018
12 Reads

An elusive case of digital ischemia in a patient with Rheumatoid Arthritis.

Pak J Med Sci 2018 Jul-Aug;34(4):1024-1026

Dr. Asif Jan Muhammad, MBBS, MCPS, MRCP (UK). Medicine Department, Patel Hospital, ST-18, Block-4, Gulshan-e-Iqbal, Karachi, Pakistan.

Essential thrombocytosis (ET) has rarely been reported with autoimmune rheumatic disorders. We report a case of young female, diagnosed case of Rheumatoid arthritis (RA), who had been overlooked for her raised platelet counts. Later her symptoms of impending digital gangrene led to an active search for her thrombocytosis. Read More

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September 2018
8 Reads

Chemical lumbar sympathectomy in the treatment of recalcitrant erythromelalgia.

J Vasc Surg 2018 Dec 17;68(6):1897-1905. Epub 2018 Aug 17.

Department of Interventional Radiology and Vascular Surgery, Peking University Third Hospital, Beijing, China.

Objective: Erythromelalgia is highly disabling and treatment is often very challenging. There have been solitary case reports that it might benefit from sympathectomy. This study sought to evaluate the short-term and long-term efficacy of chemical lumbar sympathectomy (CLS) for treatment of recalcitrant erythromelalgia and try to identify a CLS-responsive subset. Read More

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December 2018
4 Reads

Bone scan findings in erythromelalgia.

Hell J Nucl Med 2018 May-Aug;21(2):151-152. Epub 2018 Jul 12.

Dept. of Radiology, Algemeen Ziekenhuis Sint-Jan Brugge-Oostende, Ruddershove 10, B-8000 Brugge, Belgium.

The use of hyaluronic acid nanoshells has been proposed to encapsulate prodrugs and exploit the mechanisms of interactions between living cells, like endocytes or cancer cells and hyaluronic acid, which is a natural component of the extracellular matrix. In this review we describe the potential and the limits of this promising research trend and discuss the theoretical advantages of such an engineering approach. Is it a possible scalability to increase the efficacy and biodegradability of molecules like contrast media and radiotracers especially for neuroradiology and nuclear medicine studies. Read More

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October 2018
18 Reads

Mutation in Na 1.7 causes high olfactory sensitivity.

Eur J Pain 2018 Nov 11;22(10):1767-1773. Epub 2018 Jul 11.

Pain Center, TU Dresden, Germany.

Mutations in the sodium-channel Na 1.7, encoded by the gene SCN9A, are known to cause pain disorders. In particular, gain-of-function missense mutations in Na 1. Read More

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November 2018
11 Reads

Erythromelalgia - A dramatic pain of genetic origin, revealing pain mechanisms with implications for neuropathic pain in general.

Authors:
Harald Breivik

Scand J Pain 2014 Oct 1;5(4):215-216. Epub 2014 Oct 1.

University of Oslo and Oslo University Hospital, Departments of Anaesthesiology and of Pain Management and Research, Nydalen PB 4950, 0424 Oslo, Norway.

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October 2014
4 Reads

Exonic mutations in SCN9A (NaV1.7) are found in a minority of patients with erythromelalgia.

Scand J Pain 2014 Oct 1;5(4):217-225. Epub 2014 Oct 1.

Section of Clinical Neurophysiology, Department of Neurology, Oslo University Hospital-Rikshospitalet, Oslo, Norway.

Background and aim "Gain-of-function" mutations in voltage-gated sodium channel NaV1.7 have been linked to erythromelalgia (EM), characterized by painful hot and red hands and feet. We investigated the proportion of patients with EM that carry a mutation in NaV1. Read More

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October 2014
11 Reads

Mindfulness-Based Cognitive Hypnotherapy and Skin Disorders.

Am J Clin Hypn 2018 Jul;61(1):34-44

a University of South Florida , Tampa , FL, USA.

Mindfulness-based cognitive hypnotherapy integrates mindfulness, cognitive-behavioral therapy, and hypnotherapy to improve physical, emotional, mental, and/or spiritual aspects of skin disorders. Meditation, including mindfulness meditation, and hypnosis both utilize trance phenomena to help produce focalization and specific improvements in skin disorders through psycho-neuro-endocrine-immunologic mechanisms. Hypnosis, cognitive hypnotherapy, focused meditation, and mindfulness meditation are discussed with respect to improving various skin disorders including acne, acne excoriée, alopecia areata, atopic dermatitis, congenital ichthyosiform erythroderma, dyshidrotic dermatitis, erythema nodosum, erythromelalgia, furuncles, glossodynia, herpes simplex, hyperhidrosis, ichthyosis vulgaris, lichen planus, neurodermatitis, nummular dermatitis, postherpetic neuralgia, prurigo nodularis, pruritus, psoriasis, rosacea, trichotillomania, urticaria, verruca vulgaris, and vitiligo. Read More

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July 2018
29 Reads

Reply to: "Facial erythromelalgia?"

J Am Acad Dermatol 2018 05;78(5):e129

Dermatology Department, Tulane University, New Orleans, Louisiana.

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May 2018
10 Reads

Facial erythromelalgia?

Authors:
Mark D P Davis

J Am Acad Dermatol 2018 05;78(5):e127

Department of Dermatology, Mayo Clinic, Rochester, Minnesota. Electronic address:

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May 2018
11 Reads

Erythromelalgia: a cutaneous manifestation of neuropathy?

An Bras Dermatol 2018 Jan-Feb;93(1):86-94

Private practice - Rosario, Argentina.

The low prevalence of erythromelalgia, classified as an orphan disease, poses diagnostic and therapeutic difficulties. The aim of this review is to be an update of the specialized bibliography. Erythromelalgia is an infrequent episodic acrosyndrome affecting mainly both lower limbs symmetrically with the classic triad of erythema, warmth and burning pain. Read More

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April 2018
5 Reads

Reduction in pain following treatment with ranolazine in primary erythromelalgia: a case report.

Br J Dermatol 2018 Sep 5;179(3):783-784. Epub 2018 Jul 5.

University Paris Descartes, Paris, France.

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September 2018
10 Reads

Beyond Sensation: Exploring the Molecular and Genetic Basis for Pain: An Interview with Stephen Waxman, MD, PhD.

Authors:
Erin K DeNardo

Yale J Biol Med 2018 03 28;91(1):63-66. Epub 2018 Mar 28.

Department of Molecular, Cellular, and Developmental Biology, Yale University, New Haven, CT.

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March 2018
22 Reads

Cutaneous Manifestations of Chronic Vascular Disease.

Authors:
Steven M Dean

Prog Cardiovasc Dis 2018 Mar - Apr;60(6):567-579. Epub 2018 Mar 10.

Division of Cardiovascular Medicine, Ohio State University Wexner Medical Center, Columbus, OH. Electronic address:

In the contemporary era of medical diagnosis via sophisticated radiographic imaging and/or comprehensive serological testing, a focused physical examination remains paramount in recognizing the cutaneous manifestations of chronic vascular disease. Recognition of the unique cutaneous signs of lymphatic and venous hypertension assists in the diagnosis as well as the staging and classification of both lymphedema and chronic venous insufficiency. Awareness of explicit dermatologic vasomotor manifestations aids not only in the identification of acrocyanosis, Raynaud phenomenon, pernio, and erythromelalgia but also mitigates confusion related to their clinical overlap. Read More

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October 2018
7 Reads

Erythromelalgia: improvement in pain with transcranial magnetic stimulation.

Int J Dermatol 2018 Mar 10. Epub 2018 Mar 10.

Mayo Clinic School of Medicine, Rochester, MN, USA.

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March 2018
7 Reads

[Pain management in children with erythromelalgia: case report].

Rev Bras Anestesiol 2018 Sep - Oct;68(5):531-534. Epub 2018 Feb 3.

Universidade Federal de São Paulo (UNIFESP), Disciplina de Anestesiologia, Dor e Medicina Intensiva, São Paulo, SP, Brasil. Electronic address:

Erythromelalgia is a neuropathic pain syndrome due to an autosomal dominant gene, characterized by erythema, increased skin temperature and burning pain in hands and feet, whose treatment is often unsatisfactory. In this paper, we report a case of a 9 years old female patient whose first episode of burning pain, erythema and edema of the hands, without triggering factors, had instant relief after immersion in cold water. She presented with systemic arterial hypertension and had seizures. Read More

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February 2018
7 Reads

Translational Model Systems for Complex Sodium Channel Pathophysiology in Pain.

Handb Exp Pharmacol 2018 ;246:355-369

Institute of Physiology, Uniklinik RWTH Aachen University, Aachen, Germany.

Chronic pain patients are often left with insufficient treatment as the pathophysiology especially of neuropathic pain remains enigmatic. Recently, genetic variations in the genes of the voltage-gated sodium channels (Navs) were linked to inherited neuropathic pain syndromes, opening a research pathway to foster our understanding of the pathophysiology of neuropathic pain. More than 10 years ago, the rare, inherited pain syndrome erythromelalgia was linked to mutations in the subtype Nav1. Read More

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September 2018
8 Reads

Erythromelalgia.

Vasa 2018 Feb 4;47(2):91-97. Epub 2018 Jan 4.

2 Poliklinik, Funktionsbereich und Hiller Forschungszentrum für Rheumatologie, Medizinische Fakultät, Universitätsklinikum Düsseldorf, Heinrich-Heine-Universität Düsseldorf, Düsseldorf, Germany.

Erythromelalgia is a rare syndrome characterized by the intermittent or, less commonly, by the permanent occurrence of extremely painful hyperperfused skin areas mainly located in the distal extremities. Primary erythromelalgia is nowadays considered to be a genetically determined neuropathic disorder affecting SCN9A, SCN10A, and SCN11A coding for NaV1.7, NaV1. Read More

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February 2018
22 Reads

Front-Line Treatment Options for Chronic-Phase Chronic Myeloid Leukemia.

Authors:
Neil P Shah

J Clin Oncol 2018 Jan 5;36(3):220-224. Epub 2017 Dec 5.

Neil P. Shah, University of California, San Francisco, San Francisco, CA.

The Oncology Grand Rounds series is designed to place original reports published in the Journal into clinical context. A case presentation is followed by a description of diagnostic and management challenges, a review of the relevant literature, and a summary of the authors' suggested management approaches. The goal of this series is to help readers better understand how to apply the results of key studies, including those published in Journal of Clinical Oncology, to patients seen in their own clinical practice. Read More

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January 2018
3 Reads

Indomethacin-Responsive Idiopathic Red Ear Syndrome: Case Report and Pathophysiology.

Headache 2018 Feb 28;58(2):306-308. Epub 2017 Nov 28.

Department of Clinical Neurological Sciences, London Health Sciences Centre (LHSC), University of Western Ontario, London, Ontario, Canada.

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February 2018
3 Reads

Characterisation of Nav1.7 functional expression in rat dorsal root ganglia neurons by using an electrical field stimulation assay.

Mol Pain 2017 Jan-Dec;13:1744806917745179. Epub 2017 Nov 22.

1 Lilly Research Centre, 1539 Eli Lilly and Company , Windlesham, UK.

Background The Na1.7 subtype of voltage-gated sodium channels is specifically expressed in sensory and sympathetic ganglia neurons where it plays an important role in the generation and transmission of information related to pain sensation. Human loss or gain-of-function mutations in the gene encoding Na1. Read More

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July 2018
15 Reads

Secondary erythromelalgia: a tryptophan dietary supplement-induced case associated with elevated 5-hydroxyindoleacetic acid (5HIAA) urinary levels.

Int J Dermatol 2018 Jan 20;57(1):83-85. Epub 2017 Nov 20.

Department of Clinical-Surgical, Diagnostic and Pediatric Science, Institute of Dermatology, Fondazione IRCCS Policlinico San Matteo, University of Pavia, Pavia, Italy.

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January 2018
6 Reads

How a Simple Ankle Sprain Turned Into Neuropathic Pain: Complex Reflex Sympathetic Dystrophy Versus Erythromelalgia.

Workplace Health Saf 2018 Apr 9;66(4):169-172. Epub 2017 Nov 9.

1 California State University, Monterey Bay.

A 36-year-old woman sustained a Grade 2 ankle sprain at work. Two days after the injury, the ankle and foot became red and she complained of "intense burning pain." First diagnosed with complex reflex sympathetic dystrophy, the employee was prescribed medications that provided some pain relief; a subsequent temporary nerve block provided additional relief. Read More

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April 2018
13 Reads

Hand and Foot Color Change: Diagnosis and Management.

Pediatr Rev 2017 Nov;38(11):511-519

Division of Pediatric Rheumatology, Department of Pediatrics, University of Michigan, Ann Arbor, MI.

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November 2017
6 Reads

A Novel SCN9A Mutation (F826Y) in Primary Erythromelalgia Alters the Excitability of Nav1.7.

Curr Mol Med 2017 ;17(6):450-457

Department of Medical Genetics, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China.

Background: Primary erythromelalgia (PE) is a dominant inherited disorder characterized by recurrent pain, redness, and warmth of the extremities that is caused by gain-of-function mutations in Nav1.7 encoding gene SCN9A. Most of the PE-causing mutations of Nav1. Read More

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January 2017
7 Reads

Periodic facial erythema in a patient with postural orthostatic tachycardia syndrome.

Authors:
S Khan A Affleck

Clin Exp Dermatol 2018 Jan 4;43(1):100-102. Epub 2017 Oct 4.

Department of Dermatology, Ninewells Hospital, Dundee, UK.

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January 2018
7 Reads

Genomic profile of oral squamous cell carcinomas with an adjacent leukoplakia or with an erythroleukoplakia that evolved after the treatment of primary tumor: A report of two cases.

Mol Med Rep 2017 Nov 5;16(5):6780-6786. Epub 2017 Sep 5.

Cytogenetics and Genomics Laboratory, Faculty of Medicine, University of Coimbra, 3000‑354 Coimbra, Portugal.

Oral leukoplakia and erythroleukoplakia are common oral potentially malignant disorders diagnosed in the oral cavity. The specific outcome of these lesions remains to be elucidated, as their malignant transformation rate exhibits great variation. The ability to predict which of those potentially malignant lesions are likely to progress to cancer would be vital to guide their future clinical management. Read More

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November 2017
10 Reads

A Unique Case for Spinal Cord Stimulation: Successful Treatment of Small Fiber Neuropathy Pain Using Multiple Spinal Cord Stimulators.

Case Rep Med 2017 16;2017:6969285. Epub 2017 Jul 16.

University of Texas Health Sciences Campus in San Antonio (UTHSCSA), San Antonio, TX, USA.

Spinal cord stimulators have commonly been used to treat multiple pain conditions. This case report represents a unique case of using multiple spinal cord stimulators for widespread small fiber neuropathy pain. This case report concerns patient JJ who first presented with generalized neuropathic pain. Read More

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July 2017
6 Reads

Between fire and ice: refractory hypothermia and warmth-induced pain in inherited erythromelalgia.

BMJ Case Rep 2017 Jul 26;2017. Epub 2017 Jul 26.

Center for Neuroscience and Regeneration Research, Yale University School of Medicine, Veteran Affairs Medical Center, West Haven, Connecticut, USA.

Inherited erythromelalgia (IEM) is a well-described pain disorder caused by mutations of sodium channel Na1.7, a peripheral channel expressed within dorsal root ganglion and the sympathetic ganglion neurons. Clinically, IEM is characterised by paroxysmal attacks of severe pain, usually in the distal extremities, triggered by warmth or exercise. Read More

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July 2017
21 Reads

Burning pain attacks and red skin in a young woman.

Arq Neuropsiquiatr 2017 Jul;75(7):491

Universidade Federal de São Paulo, Departamento de Neurologia e Neurocirurgia, Divisão de Doenças Neuromusculares, São Paulo SP, Brasil.

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July 2017
2 Reads

Reverse pharmacogenomics: carbamazepine normalizes activation and attenuates thermal hyperexcitability of sensory neurons due to Na 1.7 mutation I234T.

Br J Pharmacol 2018 Jun 30;175(12):2261-2271. Epub 2017 Jul 30.

Department of Neurology, Yale University School of Medicine, New Haven, CT, USA.

Background And Purpose: Pharmacotherapy for pain currently involves trial and error. A previous study on inherited erythromelalgia (a genetic model of neuropathic pain due to mutations in the sodium channel, Na 1.7) used genomics, structural modelling and biophysical and pharmacological analyses to guide pharmacotherapy and showed that carbamazepine normalizes voltage dependence of activation of the Na 1. Read More

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June 2018
17 Reads

Erythromelalgia involving the face.

Dermatol Online J 2017 Apr 15;23(4). Epub 2017 Apr 15.

Baylor College of Medicine, Houston, Texas.

Erythromelalgia is a rare disorder characterized by burning pain, erythema, and increased temperature typically involving the distal extremities. Although it can progress to involve the face, erythromelalgia presenting only on the face is particularly rare. This disorder is often misdiagnosed when it presents on the extremities and is even more likely to be misdiagnosed when presenting only on the face, delaying appropriate treatment and causing considerable frustration for the patient. Read More

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April 2017
24 Reads

Complex management of a patient with refractory primary erythromelalgia lacking a mutation.

J Pain Res 2017 27;10:973-977. Epub 2017 Apr 27.

Department of Anesthesiology, Perioperative & Pain Medicine, Stanford University, Palo Alto.

A 41-year-old woman presented with burning and erythema in her extremities triggered by warmth and activity, which was relieved by applying ice. Extensive workup was consistent with adult-onset primary erythromelalgia (EM). Several pharmacological treatments were tried including local anesthetics, capsaicin, ziconotide, and dantrolene, all providing 24-48 hours of relief followed by symptom flare. Read More

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April 2017
4 Reads

Pain thresholds, supra-threshold pain and lidocaine sensitivity in patients with erythromelalgia, including the I848Tmutation in Na 1.7.

Eur J Pain 2017 09 18;21(8):1316-1325. Epub 2017 Apr 18.

Section of Clinical Neurophysiology, Department of Neurology, Oslo University Hospital - Rikshospitalet, Norway.

Objectives: Nociceptive thresholds and supra-threshold pain ratings as well as their reduction upon local injection with lidocaine were compared between healthy subjects and patients with erythromelalgia (EM).

Methods: Lidocaine (0.25, 0. Read More

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September 2017
2 Reads

Erythromelalgia: Identification of a corticosteroid-responsive subset.

J Am Acad Dermatol 2017 Mar 26;76(3):506-511.e1. Epub 2016 Oct 26.

Department of Neurology, Mayo Clinic, Rochester, Minnesota; Department of Anesthesiology, Pain Medicine, Mayo Clinic, Rochester, Minnesota. Electronic address:

Background: Corticosteroids (CS) may benefit certain patients with erythromelalgia.

Objectives: Our objective was to determine clinical predictors of corticosteroid-responsive erythromelalgia.

Methods: Patients with erythromelalgia who received CS were identified and stratified into corticosteroid nonresponders (NRs), partial corticosteroid responders (PSRs), complete corticosteroid responders (CSRs), and steroid responders (SRs = PSRs + CSRs). Read More

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March 2017
48 Reads

[Small fiber neuropathy].

Rev Med Interne 2018 Feb 11;39(2):99-106. Epub 2017 Apr 11.

U1096, service de médecine interne, Normandie univ, UNIROUEN, 76000 Rouen, France.

Small fiber neuropathy (SFN) is still unknown. Characterised by neuropathic pain, it typically begins by burning feet, but could take many other expression. SFN affects the thinly myelinated Aδ and unmyelinated C-fibers, by an inherited or acquired mechanism, which could lead to paresthesia, thermoalgic disorder or autonomic dysfunction. Read More

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February 2018
30 Reads

Gain-of-function mutation of a voltage-gated sodium channel Na1.7 associated with peripheral pain and impaired limb development.

J Biol Chem 2017 06 5;292(22):9262-9272. Epub 2017 Apr 5.

From the Department of Neurology,

Dominant mutations in voltage-gated sodium channel Na1.7 cause inherited erythromelalgia, a debilitating pain disorder characterized by severe burning pain and redness of the distal extremities. Na1. Read More

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June 2017
34 Reads

[Erythromelalgia: an exceptional complication of rheumatoid arthritis].

Pan Afr Med J 2016;25:226. Epub 2016 Dec 7.

Service d'Orthopédie, Hôpital Sahloul, Sousse, Tunisie.

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April 2018
7 Reads

Network topology of NaV1.7 mutations in sodium channel-related painful disorders.

BMC Syst Biol 2017 02 24;11(1):28. Epub 2017 Feb 24.

Neuroalgology Unit, IRCCS Foundation "Carlo Besta" Neurological Institute, Milan, Italy.

Background: Gain-of-function mutations in SCN9A gene that encodes the voltage-gated sodium channel NaV1.7 have been associated with a wide spectrum of painful syndromes in humans including inherited erythromelalgia, paroxysmal extreme pain disorder and small fibre neuropathy. These mutations change the biophysical properties of NaV1. Read More

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February 2017
35 Reads

Nonlinear effects of hyperpolarizing shifts in activation of mutant Na1.7 channels on resting membrane potential.

J Neurophysiol 2017 04 1;117(4):1702-1712. Epub 2017 Feb 1.

Department of Neurology and Center for Neuroscience and Regeneration Research, Yale University School of Medicine, New Haven, Connecticut; and

The Na1.7 sodium channel is preferentially expressed within dorsal root ganglion (DRG) and sympathetic ganglion neurons. Gain-of-function mutations that cause the painful disorder inherited erythromelalgia (IEM) shift channel activation in a hyperpolarizing direction. Read More

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April 2017
4 Reads

Buerger Test for Erythromelalgia Revisited.

J Am Osteopath Assoc 2017 Feb;117(2):124-126

Leo Buerger, MD, was the first to describe dependent rubor associated with marked atherosclerosis. Historically, dependent rubor has been described as erythromelalgia (or erythromelia), and terms such as chronic rubor, reactionary rubor, induced rubor, and hyperemic response have also been used to describe this sign associated with peripheral vascular disease. This brief review will reacquaint physicians with the Buerger test, which is used to assess arterial sufficiency, as well as erythromelalgia, and the proposed mechanisms responsible for erythromelalgia. Read More

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February 2017
9 Reads

Burning pain: axonal dysfunction in erythromelalgia.

Pain 2017 05;158(5):900-911

aDepartment of Neurology, Sydney Children's Hospital and School of Women's and Children's Health, University of New South Wales, Sydney, Australia bDepartment of Neurology and Medical Genetics, National Taiwan University Hospital, Taipei, Taiwan cBrain and Mind Centre, The University of Sydney, Sydney, Australia dTranslational Neuroscience Facilities (TNF), Department of Physiology, School of Medical Sciences, Faculty of Medicine, University of New South Wales, Randwick, Sydney, Australia.

Erythromelalgia (EM) is a rare neurovascular disorder characterized by intermittent severe burning pain, erythema, and warmth in the extremities on heat stimuli. To investigate the underlying pathophysiology, peripheral axonal excitability studies were performed and changes with heating and therapy explored. Multiple excitability indices (stimulus-response curve, strength-duration time constant (SDTC), threshold electrotonus, and recovery cycle) were investigated in 23 (9 EMSCN9A+ and 14 EMSCN9A-) genetically characterized patients with EM stimulating median motor and sensory axons at the wrist. Read More

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May 2017
61 Reads

Neuropathic and Myopathic Pain.

Semin Pediatr Neurol 2016 08 14;23(3):242-247. Epub 2016 Oct 14.

Division of Pediatric Neurology, Department of Pediatrics, University of Florida College of Medicine, Gainesville, FL.

The evaluation and management of childhood pain syndromes of neuromuscular origin have distinct challenges, as the patterns of disease presentation and the ability of a child to describe symptoms may differ from that of an adult. Advances in scientific and clinical knowledge are leading to significant progress in the care of affected children. The genetic origins of Fabry disease and the inherited form of erythromelalgia are better understood. Read More

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August 2016
7 Reads

Epidermal Nerve Fiber Quantification in Patients With Erythromelalgia.

JAMA Dermatol 2016 Dec 7. Epub 2016 Dec 7.

Department of Dermatology, Mayo Clinic, Rochester, Minnesota.

Importance: Erythromelalgia is a clinical diagnosis based on intermittent warmth, erythema, and pain in the distal extremities. One problem facing physicians is how to objectively test for this disease. Given that other painful conditions of the distal extremities (ie, neuropathy related to human immunodeficiency virus, diabetes, or Fabry disease) can be evaluated with a skin biopsy to visualize pathologically decreased densities of the small nerve fibers that innervate the epidermis, one hypothesis is that erythromelalgia could similarly be associated with a loss of epidermal nerve fiber density (ENFD). Read More

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December 2016
11 Reads