Arteriovenous MalformationsGENE-MAVNCT04772963
Genetics of Central Nervous System Arteriovenous Malformations (GENE-MAV)
An observational study of Arteriovenous Malformations, run by Fondation Ophtalmologique Adolphe de Rothschild at 1 site in France.
Trial summary
Cerebral and medullary arteriovenous malformations (AVMs) lead to arterial and venous networks to communicate pathologically, creating an arteriovenous shunt. The occurrence of intracranial haemorrhage is the most important prognostic factor of AVMs because it is associated with a significant morbidity and mortality. Read more about this study
- Who is it for?
- Any age
- Conditions the study is for
- Arteriovenous Malformations
- What is being tested?
- blood sample
- How many people
- 300 participants
- Where
- 1 siteFrance
- Study dates
- 17 Feb 2022to Mar 2027
- Phase
- Observational
- Are there results?
- Not yet: the study is under way
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages Any age
- All sexes
- No healthy volunteers
- Child, Adult, Older adult
Study population: The recruited population will be index cases with cerebrovascular cerebral vascular malformations treated in the participating centres
Who may be able to join
- Patient with a vascular malformation of the cerebral or medullary identified on diagnostic imaging (angio-CT, angio-MRI or diagnostic angiography) for which clinical monitoring alone or intervention (endovascular treatment, surgery or radiosurgery) is planned in the centres participating in the research.
Who cannot join
- Pregnant, parturient or breastfeeding woman
Trial locations and contacts
1 site in 1 country. Contact the study team or a site near you to ask about taking part.
France1 site, 1 recruiting
- Recruiting
HOPITAL FONDATION Adolphe de ROTHSCHILD
Paris, 75019
Stanislas SMAJDA, DR, ssmajda@for.paris
About this study
Official title: Genetics of Central Nervous System Arteriovenous Malformations (AVM): Genotype-Phenotype Correlation and Prognostic Impact on Patients With AVM
Cerebral and medullary arteriovenous malformations (AVMs) lead to arterial and venous networks to communicate pathologically, creating an arteriovenous shunt. The occurrence of intracranial haemorrhage is the most important prognostic factor of AVMs because it is associated with a significant morbidity and mortality. The genetic, molecular and cellular mechanisms that cause vascular malformations of the central nervous system are partially known and the influence of genetic damage on the prognosis of AVMs is poorly known.
Read the detailed description
Cerebral and medullary arteriovenous malformations (AVMs) are morphologically abnormal vessels located on the surface or in the cerebral or medullary parenchyma. These vascular lesions cause the arterial and venous networks to communicate pathologically, creating an arteriovenous shunt.
The prevalence of cerebral Cerebral and medullary AVMs in general population is difficult to establish given the rarity of the condition. However, it is estimated at around 1 per 10,000 inhabitants (0.01%). About 15-20% of the cerebral vascular accidents are asymptomatic at the time of diagnosis. The occurrence of intracranial haemorrhage is the most important prognostic factor because it is associated with a significant morbidity and mortality. The management of an AVM is usually carried out in a multidisciplinary way, combining interventional neuroradiology, neurosurgery and vascular neurology.
The genetic, molecular and cellular mechanisms that cause vascular malformations of the central nervous system are partially known. Several recent research works highlight mutations in the RAS-MAPK or MAPK-ERK signalling pathway in AVMs. In cases of cerebral AVMs considered to be sporadic, a somatic KRAS/BRAF mutation has recently been demonstrated in tissue samples of operated AVMs.
Except in the case of Hereditary Haemorrhagic Telangiectasia (HHT or Rendu-Osler-Weber syndrome), the influence of genetic damage on the prognosis of AVM is poorly known. It is also interesting to note that genetic screening is not routinely performed in patients with cerebro-medullary AVMs and that therefore the prevalence of these clinical entities in patients with AVMs is not known.
- Conditions
- Arteriovenous Malformations
- Being tested
- blood sample
- Medical subject headings
- Arteriovenous Malformations
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
blood sampleGenetic
During the arteriography a peripheral venous sampling
What is being measured
The primary outcome is the main question the study is designed to answer.
Genetic mutation
Presence of a pathogenic mutation in one of the genes tested in the panel or identification of a pathogenic mutation following sequencing of the exome and/or transcriptome of the patient and/or his/her parents.
Measured: limit of 12 month
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted26 Feb 2021
- Study start17 Feb 2022
- Primary completionMar 2026 (estimated)
- Study completionMar 2027 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Arteriovenous MalformationsStudies of the same condition, open and under way.
- More trials run by Fondation Ophtalmologique Adolphe de RothschildThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
- Observational model
- Cohort
- Time perspective
- Prospective
- Enrolment
- 300 participants (estimated)
Sponsor and investigators
- Lead sponsor
- Fondation Ophtalmologique Adolphe de Rothschild
- Sponsor type
- Research network
- Responsible party
- Sponsor
- Investigators
- Stanislas Smajda, MD, Principal investigator, Fondation Ophtalmologique Adolphe de Rothschild
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT04772963
- Sponsor's protocol ID
- SSA_2021_3
- Acronym
- GENE-MAV
- Status last verified
- Jan 2026
- First submitted
- 23 Feb 2021
- Last updated
- 22 Jan 2026
- Results posted
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
Study at a glance
From the registry record, last updated by the sponsor on 22 Jan 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Genetics of Central Nervous System Arteriovenous Malformations (AVM): Genotype-Phenotype Correlation and Prognostic Impact on Patients With AVM
- ClinicalTrials.gov ID
- NCT04772963
- Acronym / sponsor ID
- GENE-MAV / SSA_2021_3
- Conditions
- Arteriovenous Malformations
- Study type
- Observational
- Recruitment status
- Recruiting
- Enrolment
- 300 participants (estimated)
- Lead sponsor
- Fondation Ophtalmologique Adolphe de RothschildResearch network
- Study start
- 17 Feb 2022 (actual)
- Primary completion
- Mar 2026 (estimated)
- Study completion
- Mar 2027 (estimated)
- First posted
- 26 Feb 2021 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
Cerebral and medullary arteriovenous malformations (AVMs) lead to arterial and venous networks to communicate pathologically, creating an arteriovenous shunt. The occurrence of intracranial haemorrhage is the most important prognostic factor of AVMs because it is associated with a significant morbidity and mortality. The genetic, molecular and cellular mechanisms that cause vascular malformations of the central nervous system are partially known and the influence of genetic damage on the prognosis of AVMs is poorly known.
Detailed description
Cerebral and medullary arteriovenous malformations (AVMs) are morphologically abnormal vessels located on the surface or in the cerebral or medullary parenchyma. These vascular lesions cause the arterial and venous networks to communicate pathologically, creating an arteriovenous shunt.
The prevalence of cerebral Cerebral and medullary AVMs in general population is difficult to establish given the rarity of the condition. However, it is estimated at around 1 per 10,000 inhabitants (0.01%). About 15-20% of the cerebral vascular accidents are asymptomatic at the time of diagnosis. The occurrence of intracranial haemorrhage is the most important prognostic factor because it is associated with a significant morbidity and mortality. The management of an AVM is usually carried out in a multidisciplinary way, combining interventional neuroradiology, neurosurgery and vascular neurology.
The genetic, molecular and cellular mechanisms that cause vascular malformations of the central nervous system are partially known. Several recent research works highlight mutations in the RAS-MAPK or MAPK-ERK signalling pathway in AVMs. In cases of cerebral AVMs considered to be sporadic, a somatic KRAS/BRAF mutation has recently been demonstrated in tissue samples of operated AVMs.
Except in the case of Hereditary Haemorrhagic Telangiectasia (HHT or Rendu-Osler-Weber syndrome), the influence of genetic damage on the prognosis of AVM is poorly known. It is also interesting to note that genetic screening is not routinely performed in patients with cerebro-medullary AVMs and that therefore the prevalence of these clinical entities in patients with AVMs is not known.
Study design
- Observational model
- Cohort
- Time perspective
- Prospective
Who may qualify
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Child, Adult, Older adult
- Study population
- The recruited population will be index cases with cerebrovascular cerebral vascular malformations treated in the participating centres
Key inclusion criteria (1 listed)
- Patient with a vascular malformation of the cerebral or medullary identified on diagnostic imaging (angio-CT, angio-MRI or diagnostic angiography) for which clinical monitoring alone or intervention (endovascular treatment, surgery or radiosurgery) is planned in the centres participating in the research.
Key exclusion criteria (1 listed)
- Pregnant, parturient or breastfeeding woman
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| blood sampleDuring the arteriography a peripheral venous sampling | Genetic | – |
Primary outcome
Genetic mutation
Time frame: limit of 12 month
Presence of a pathogenic mutation in one of the genes tested in the panel or identification of a pathogenic mutation following sequencing of the exome and/or transcriptome of the patient and/or his/her parents.
Results and safety
This study is still under way. Results are not available in the source record yet.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 22 Jan 2026.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part.
Stanislas Smajda, MD principal investigator
Fondation Ophtalmologique Adolphe de Rothschild
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Arteriovenous Malformations, run by Fondation Ophtalmologique Adolphe de Rothschild at 1 site in France.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 1 inclusion and 1 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: looking for participants now, as of the sponsor's last update on 22 Jan 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in France. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
This study is still under way. Results are not available in the source record yet.
How can a doctor refer a patient or contact the research team?
Contact Stanislas Smajda, MD (0148036454, ssmajda@for.paris), or a site near the patient. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Genetic mutation (time frame: limit of 12 month). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 22 Jan 2026.