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New study aims to unravel mysteries of rare nerve disorder

NCT ID NCT03918421

Knowledge-focused Sponsor: Hospices Civils de Lyon Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study is gathering detailed information from 45 people with a rare nerve condition called IgM-anti-MAG peripheral neuropathy. The goal is to better understand the different types of the disease, how it changes over time, and how patients respond to treatments. Researchers will use this data to create a new questionnaire that measures how the condition affects daily life.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Participants

About 45 people

The number the study aims to enrol. It can still change while the study runs.

Started

Jun 2020

Expected to finish

Jun 2030

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Who is studied

Patients at least 18 years old fulfilling the international criteria for Immunogloblin M (IgM)-anti-myelin-associated-glycoprotein (MAG) monoclonal gammopathy and peripheral neuropathy

Ages

18 years and older

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * fulfilling the international criteria for the diagnosis Immunogloblin M (IgM) monoclonal gammopathy, with anti-myelin-associated-glycoprotein (MAG) antibodies, and peripheral neuropathy. * age of 18 years or older followed in neuromuscular department of Lyon; * informed consent given by the participant Exclusion Criteria: * concomitant diseases possibly interfering with peripheral nerve and function, as well as physical functioning, such as diabetes, renal insufficiency, (prior) treatment with chemotherapy for diseases other than their Immunogloblin M (IgM) monoclonal gammopathy associated peripheral neuropathy, history of hereditary neuropathy, vitamin deficiency, connective tissue disorder, hepatitis B and C and human immunodeficiency virus (HIV) infection, alcohol abuse (more than 5 International Units(IU)/day); * an active malignancy with poor prognosis, undergoing treatment aside from monoclonal gammopathy associated peripheral neuropathy; * pregnant; * the use of any medication that may cause peripheral nerve function

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Conditions

The condition(s) this trial relates to.

polyneuropathy associated with IgM monoclonal gammapathy with anti-MAG

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Immunoglobin M anti-myelin-associated-glycoprotein peripheral neuropathy

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    2 sites. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • Centre de référence NNERf

    RECRUITING

    Le Kremlin-Bicêtre, 94275, France

  • Hospices Civils de Lyon Service Neurologie C, Pathologies Neuromusculaires, Unité 302

    RECRUITING

    Bron, 69500, France