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Which of the following factors is most likely to influence your treatment choice?

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Method of administration
   
Frequency of administration
   
Treatment side effects
   
Cost/availability
   

Tutorial

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Which of the potential future treatment targets are you most excited about?

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T-cell targeting
   
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Tutorial

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Poll

Which tool do you use most frequently to assess a suspicion of myasthenia gravis?

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Ice pack test
   
Serological testing
   
RNS testing
   
SFEMG
   
 
How can we overcome diagnostic delay in myasthenia gravis?
How important is serological diagnosis in myasthenia gravis?
How can we integrate new and emerging agents for the treatment of generalized myasthenia gravis into clinical practice?
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Neuromuscular Diseases CE/CME accredited

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A relaxed discussion between two faculty focussed on real world clinical issues. Useful tips below will show how to navigate the activity. Join the conversation. Close

Accelerating myasthenia gravis diagnosis and treatment: Practical strategies and therapeutic advances

  • Select in the video player controls bar to choose subtitle language. Subtitles available in English, French, German, Italian, Spanish.
  • A practice aid is available for this activity in the Toolkit
  • Downloads including slides are available for this activity in the Toolkit
Learning Objectives

After watching this activity, participants should be better able to:

  • Describe the characteristic clinical and laboratory findings of myasthenia gravis, and the confirmatory diagnostic tests
  • Explain the serological subgroups of myasthenia gravis and their implications for treatment selection
  • Interpret the latest data for newly available therapies in the treatment of generalized myasthenia gravis and their implications for clinical practice
Overview

Watch Dr Carolina Barnett-Tapia and Prof. Nils Erik Gilhus discuss the practical considerations for the diagnosis of myasthenia gravis (MG), serological subgroup testing and the implementation of newly available treatments for MG. They will also consider the emerging treatments for generalized MG and the potential impact on the therapeutic landscape.

This activity is jointly provided by USF Health and touchIME.
touchIME is an EBAC® accredited provider.

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Target Audience

This activity has been designed to meet the educational needs of neurologists, neuromuscular specialists and neurology nurses involved in the management of myasthenia gravis.

USF Accreditation

Disclosures

USF Health adheres to the Standards for Integrity and Independence in Accredited Continuing Education. All individuals in a position to influence content have disclosed to USF Health any financial relationship with an ineligible organization. USF Health has reviewed and mitigated all relevant financial relationships related to the content of the activity. The relevant relationships are listed below. All individuals not listed have no relevant financial relationships.

Faculty

Dr Carolina Barnett-Tapia discloses: Advisory board or panel fees from Alexion, Argenx, UCB and Janssen. Consultant fees from Argenx, Janssen, Novartis and UCB. Speaker’s bureau fees from Argenx. Other financial or material support from Patent MGII.

Prof. Nils Erik Gilhus discloses: Advisory board or panel fees from Alexion, Amgen, Argenx, Denka, Dianthus Therapeutics, Grifols, Huma, Immunovant, Janssen, Johnson & Johnson, Merck, Roche, Takeda, UCB. Consultant fees from Alexion, Amgen, Argenx, Denka, Dianthus Therapeutics, Grifols, Huma, Immunovant, Janssen, Johnson & Johnson, Merck, Roche, Takeda, UCB.

Content reviewer

Kathleen Murray, MD has no financial interests/relationships or affiliations in relation to this activity.

touchIME Medical Contributors

Judah Issa has no financial interests/relationships or affiliations in relation to this activity.

Kathy Day has no financial interests/relationships or affiliations in relation to this activity.

USF Health Office of Continuing Professional Development and touchIME staff have no financial interests/relationships or affiliations in relation to this activity.

Requirements for Successful Completion

In order to receive credit for this activity, participants must review the content and complete the post-test and evaluation form. Statements of credit are awarded upon successful completion of the post-test and evaluation form.

If you have questions regarding credit please contact cpdsupport@usf.edu 

Accreditations

Physicians

This activity has been planned and implemented in accordance with the accreditation requirements and policies of the Accreditation Council for Continuing Medical Education (ACCME) through a joint providership of USF Health and touchIME. USF Health is accredited by the ACCME to provide continuing medical education for physicians.

USF Health designates this enduring material for a maximum of 0.75 AMA PRA Category 1 CreditTM.  Physicians should claim only the credit commensurate with the extent of their participation in the activity.

The European Union of Medical Specialists (UEMS) – European Accreditation Council for Continuing Medical Education (EACCME) has an agreement of mutual recognition of continuing medical education (CME) credit with the American Medical Association (AMA). European physicians interested in converting AMA PRA Category 1 CreditTM into European CME credit (ECMEC) should contact the UEMS (www.uems.eu).

Advanced Practice Providers

Physician Assistants may claim a maximum of 0.75 Category 1 credits for completing this activity. NCCPA accepts AMA PRA Category 1 CreditTM from organizations accredited by ACCME or a recognized state medical society.

The AANPCP accepts certificates of participation for educational activities approved for AMA PRA Category 1 CreditTM by ACCME-accredited providers. APRNs who participate will receive a certificate of completion commensurate with the extent of their participation.

Nurses

USF Health is accredited as a provider of nursing continuing professional development by the American Nurses Credentialing Center’s Commission on Accreditation.

A maximum of 0.75 contact hour may be earned by learners who successfully complete this  continuing professional development activity. USF Health, the accredited provider, acknowledges touchIME as the joint provider in the planning and execution of this CNE activity.

This activity is awarded 0.75 ANCC pharmacotherapeutic contact hour.

Pharmacists

USF Health is accredited by the Accreditation Council for Pharmacy Education as a provider of continuing pharmacy education. This knowledge-based program has been approved for (0.75 hour) contact hours (0.75 CEUs).  Universal program number is as follows: 0230-9999-25-012-H01-P

This activity can be viewed on any web browser such as, but not limited to, Google Chrome, Firefox, Safari, Opera, Microsoft Edge and Internet Explorer.

Date of original release: 26 June 2025. Date credits expire: 26 June 2026.

If you have any questions regarding credit please contact cpdsupport@usf.edu.

EBAC® Accreditation

touchIME is an EBAC® accredited provider since 2023.

This programme is accredited by the European Board for Accreditation of Continuing Education for Health Professionals (EBAC®) for 54 mins of effective education time.

The Accreditation Council for Continuing Medical Education (ACCME®), and the Royal College of Physicians and Surgeons of Canada hold an agreement on mutual recognition on substantive equivalency of accreditation systems with EBAC®.

Through an agreement between the European Board for Accreditation of Continuing Education for Health Professionals and the American Medical Association (AMA), physicians may convert EBAC® CE credits to AMA PRA Category 1 CreditsTM. Information on the process to convert EBAC® credit to AMA credit can be found on the AMA website. Other health care professionals may obtain from the AMA a certificate of having participated in an activity eligible for conversion of credit to AMA PRA Category 1 CreditTM.

Faculty Disclosure Statement / Conflict of Interest Policy

In compliance with EBAC® guidelines, all speakers/ chairpersons participating in this programme have disclosed or indicated potential conflicts of interest which might cause a bias in the presentations. The Organizing Committee/Course Director is responsible for ensuring that all potential conflicts of interest relevant to the event have been mitigated and declared to the audience prior to the CME activities.

Faculty

Dr Carolina Barnett-Tapia discloses: Advisory board or panel fees from Alexion, Argenx, UCB and Janssen. Consultant fees from Argenx, Janssen, Novartis and UCB. Speaker’s bureau fees from Argenx. Other financial or material support from Patent MGII.

Prof. Nils Erik Gilhus discloses: Advisory board or panel fees from Alexion, Amgen, Argenx, Denka, Dianthus Therapeutics, Grifols, Huma, Immunovant, Janssen, Johnson & Johnson, Merck, Roche, Takeda, UCB. Consultant fees from Alexion, Amgen, Argenx, Denka, Dianthus Therapeutics, Grifols, Huma, Immunovant, Janssen, Johnson & Johnson, Merck, Roche, Takeda, UCB.

touchIME Medical Contributors

Judah Issa has no financial interests/relationships or affiliations in relation to this activity.

Requirements for Successful Completion

Certificates of Completion may be awarded upon successful completion of the post-test and evaluation form. If you have completed one hour or more of effective education through EBAC® accredited CE activities, please contact us at accreditation@touchime.org to receive your EBAC® CE credit certificate. EBAC® grants 1 CE credit for every hour of education completed.

Date of original release: 26 June 2025. Date credits expire: 26 June 2027.

Time to Complete: 54 minutes

If you have any questions regarding the EBAC® credits, please contact accreditation@touchime.org

This activity is CE/CME accredited

To obtain the CE/CME credit(s) from this activity, please complete this post-activity test.

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Topics covered in this activity

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touchIN CONVERSATION
Accelerating myasthenia gravis diagnosis and treatment: Practical strategies and therapeutic advances
0.75 CE/CME credit

Question 1/5
Which of the following are key red flag symptoms for suspicion of myasthenia gravis?

Myasthenia gravis is characterized by fatigable muscle weakness in the extraocular muscles, bulbar muscles and limbs. Symptoms often worsen with exertion and improve with rest. Ocular symptoms, including ptosis and double vision, are the most common presenting symptoms of myasthenia gravis.

Reference

Dresser L, et al. J Clin Med. 2021;10:2235.

Question 2/5
You have a patient who presents with fluctuating muscle weakness and double vision. You suspect this may be myasthenia gravis. Which test has the highest specificity to establish a diagnosis?

AChR, acetylcholine receptor; RNS, repetitive nerve stimulation; SFEMG, single-fibre electromyography.

Serological testing is important for confirmation of diagnosis and for therapy decisions in patients with myasthenia gravis.1 The anti-AChR antibody test is very specific and is able to confirm the diagnosis in patients with classical clinical findings.2 Electrophysiological tests, such as the RNS and the SFEMG, are relevant in patients who are seronegative in antibody testing.2

Abbreviations

AChR, acetylcholine receptor; RNS, repetitive nerve stimulation; SFEMG, single-fibre electromyography.

References

  1. Li Y, et al. Ann Transl Med. 2019;11:290.
  2. Beloor Suresh A, Asuncion RMD. Myasthenia Gravis. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing. 2023. Available at: www.ncbi.nlm.nih.gov/books/NBK559331/ (accessed 29 April 2025).
Question 3/5
You performed serological testing on a patient, the test results came back to show that the patient had a borderline increase in the concentration of AChR antibodies in their blood. Tests for MuSK and LRP4 antibodies came back negative. What would you do next to inform your treatment approach?

AChR, acetylcholine receptor; LRP4, low-density lipoprotein receptor-related protein 4; MuSK, muscle specific kinase.

Repeating the testing for AChR, particularly if lower sensitivity testing is used, can help orient the diagnosis in cases of borderline positivity.1 Borderline positive tests may be a result of false-positive tests, this may result in patients being falsely diagnosed with myasthenia gravis and receiving unnecessary treatment with pyridostigmine.2 Retesting patients where there is clinical doubt or using additional testing modalities may help identify cases of false positives or delayed seroconversion.3 It is important to ascertain the patient’s serological subgroup, as the treatment regimen for myasthenia gravis varies according to the associated antibodies.4

Abbreviation

AChR, acetylcholine receptor.

References

  1. Vinciguerra C, et al. Brain Sci. 2023;13:1286.
  2. Zara P, at l. Neurology. 2025;13:e213498.
  3. Rousseff RT. J Clin Med. 2021;10:1736.
  4. Li Y, et al. Ann Transl Med. 2019;11:290.
Question 4/5
You are managing a patient with generalized myasthenia gravis who is AChR-antibody-negative and MuSK-antibody-positive and who is still experiencing symptoms after initial therapy, including rituximab. Based on current evidence, which of the following advanced therapies is most appropriate to consider for this patient?

AChR, acetylcholine receptor; FcRn, neonatal Fc receptor; MuSK, muscle specific kinase.

Based on the MycarinG phase III trial, the FcRn inhibitor, rozanolixizumab (7 mg/kg or 10 mg/kg) demonstrated a significant and sustained improvement in MG-ADL scores in patients who were AChR-antibody-positive and those who were MuSK-antibody-positive, compared with placebo.1,2 It is currently the only approved FcRn inhibitor in patients who are MuSK-antibody-positive.3,4 As the anti-MuSK antibodies are IgG4, which does not bind complement, there is no role for the use of complement inhibitors in MuSK-antibody-positive myasthenia gravis.5 Thymectomy is recommended in AChR-antibody-positive patients who are eligible and should be performed within 5 years after diagnosis.6

Abbreviations

AChR, acetylcholine receptor; FcRn, neonatal Fc receptor; IgG4, immunoglobulin G4; MG-ADL, myasthenia gravis activities of daily living; MuSK, muscle specific kinase.

References

  1. Bril V, et al. Lancet Neurol. 2023;22:383–94.
  2. Bril V, et al. J Neuromuscul Dis. 2025;12:218–30.
  3. FDA. Rozanolixizumab PI. Available at: www.accessdata.fda.gov/drugsatfda_docs/label/2023/761286s000lbl.pdf (accessed 6 February 2025).
  4. EMA. Rozanolixizumab SmPC. Available at: www.ema.europa.eu/en/documents/product-information/rystiggo-epar-product-information_en.pdf (accessed 26 March 2025).
  5. DeHart-McCoyle M, et al. BMJ Med. 2023;2:e000241.
  6. De Bleecker JL, et al. Acta Neurol Belg. 2024;124:1371–83.
Question 5/5
When managing patients with myasthenia gravis, what potential benefits could you consider when deciding to initiate an oral therapy, once available?

Oral administration is convenient and experiences widespread acceptance from patients.1 Injections and IV infusions are usually administered in a hospital setting, as they require experienced professionals to administer the treatment.2 In addition, IV or subcutaneous administration require needles, syringes and other equipment for administration, resulting in increased healthcare resource utilization compared with oral therapies.2 However, oral administration is associated with variable absorption rates and oral treatments may be contraindicated in some patients.1

Abbreviation

IV, intravenous.

References

  1. Kim J, De Jesus O. Medication routes of administration. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing. 2023. Available at: www.ncbi.nlm.nih.gov/books/NBK568677/ (accessed 2 May 2025).
  2. Cyriac JM, James E. J Pharmacol Pharmacother. 2014;5:83–7.
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