ClinicalTrials.gov record NCT07644325

Concordance for Transthyretin Amyloidosis Between Synovial Biopsy and Anterior Carpal Ligament Biopsy

Record copied from ClinicalTrials.gov: Oct 10, 2026AI summaries generated: Sep 17, 2026

Assessment of Diagnostic Concordance for Transthyretin Amyloidosis Between Synovial Biopsy and Anterior Carpal Ligament Biopsy in Patients Who Underwent Endoscopic Carpal Tunnel Syndrome Surgery

StatusRecruitingThe study is currently enrolling participants. Only the study team can say whether a particular person can join.
Study typeInterventionalA study in which researchers assign participants to one or more interventions, such as a drug, procedure, device, behavioural programme or other approach, to measure their effects.
Age18 years old and older
SexAll
LocationFrance
AI summaryWhat this study is about, in plain languageShow ▾Hide ▴

AI-written from the registry record, not the study's own wording. May contain errors or omissions. Check the registry text on this page and the original record ↗ before acting on it.

This interventional diagnostic study takes an annular ligament biopsy alongside the standard synovial biopsy during endoscopic carpal tunnel surgery to compare results. Adults scheduled for endoscopic carpal tunnel surgery will have both tissue samples taken during their procedure. The study also records whether the ligament biopsy is feasible to obtain and any short-term complications.

What it is studying. The study tests whether a biopsy of the anterior annular ligament of the carpus taken during endoscopic carpal tunnel surgery gives the same result as the gold-standard synovial biopsy for detecting amyloid deposits from transthyretin amyloidosis, and whether the ligament biopsy is feasible and safe in the perioperative period.

What the researchers hope to learn. To measure agreement between synovial biopsy and anterior annular ligament biopsy for detecting transthyretin amyloid deposits; to describe how often ligament biopsy can be successfully obtained during endoscopic surgery; and to assess immediate safety/complications of the ligament biopsy.

What this study is about

The study's own summary, as published on ClinicalTrials.gov. Underlined terms have a short explanation.

Transthyretin amyloidosis (ATTR) is an underdiagnosed condition that can present early as carpal tunnel syndrome, sometimes preceding cardiac involvement by several years. The recent emergence of new treatments underscores the importance of early diagnosis. Synovial biopsy performed during open carpal tunnel surgery is considered the gold standard for local screening, but it is less accessible, more difficult, and riskier to perform via endoscopy-a minimally invasive surgical technique that is currently the standard at our center and is becoming increasingly widespread. The anterior annular ligament of the carpus constitutes an alternative tissue to the synovium, easily accessible via endoscopy, safe, and standardizable. In this study, the systematic performance of an annular ligament biopsy in conjunction with a synovial biopsy during endoscopic carpal tunnel surgery would allow for the evaluation of the diagnostic concordance of the ligament biopsy by comparing it to the results obtained using the gold standard method. This strategy would also provide an opportunity to analyze the feasibility of systematic screening for ATTR on the ligament during endoscopic procedures. This approach could offer a practical and innovative method for the early identification of at-risk patients and facilitate appropriate and timely management of the condition.

Interventions being studied

Being studied in this trial does not mean the treatment or procedure is approved or available for this condition.

Diagnostic test
  • Annular ligament biopsy

Eligibility

The criteria exactly as listed on ClinicalTrials.gov. Only the study team can say whether they apply to you.

Inclusion criteria

  • Adult patient with Health Insurance
  • Clinical diagnosis + carpal tunnel EMG
  • Validated indication for carpal tunnel surgery
  • Signed informed consent
  • Patient at risk for postoperative complications (bilateral carpal tunnel syndrome, heart failure, atrial fibrillation, elderly patients)

Exclusion criteria

  • Need for open carpal tunnel surgery.
  • Pregnant women
  • Adults under guardianship

Study description and what participation involves

The registry record has no detailed description beyond the summary above.

AI summaryWhat participation may involve, in plain languageShow ▾Hide ▴

AI-written from the registry record, not the study's own wording. May contain errors or omissions. Check the registry text on this page and the original record ↗ before acting on it.

If you join, you will undergo the usual endoscopic carpal tunnel surgery and, in addition to the standard synovial biopsy, a biopsy of the anterior annular ligament of the carpus will be taken during the same operation. The tissue samples will be sent for laboratory (histopathological) examination to look for amyloid deposits. Study staff will assess the feasibility of obtaining the ligament biopsy during the procedure and monitor safety around the time of surgery (including assessments up to 24 hours); diagnostic agreement between the two biopsies will be evaluated (results considered up to about 3 weeks). You must sign informed consent before any study procedures.

How the study is structured. Interventional diagnostic study with a single group and no masking. Every participant undergoes both a synovial biopsy (standard) and an anterior annular ligament biopsy during their endoscopic carpal tunnel surgery; the biopsy results are compared.

Questions you could ask

These questions are suggestions for a conversation with the study team or your own clinician, not advice.

  • The registry lists this study under Carpal Tunnel; Transthyretin Amyloidosis. Does it apply to my diagnosis?
  • The listed sites are in France. Is any of them reachable for me, and does the study help with travel?
  • Which of the eligibility criteria would need to be checked with tests before I could join?

More on ATTRv amyloidosis

This trial is also listed on this site under wild-type ATTR amyloidosis.

Clinical trials106 trials listed for ATTRv amyloidosisEvery trial the registry lists for ATTRv amyloidosis, with recruitment status, phase and sites, updated from ClinicalTrials.gov.See all trials →Research updatesWhat changed in ATTRv amyloidosis researchLatest monthly update: September 2026. Includes: Gene-silencing drugs. New research summarized each month in plain language, with links to every source paper.Read the latest update →

Important dates

Study start
May 27, 2026
Primary completion
May 27, 2027 (estimated)
Study completion
May 27, 2027 (estimated)
Target enrollment
500 participants (estimated)
Last updated on registry
Jun 12, 2026
Data verified
Oct 10, 2026

Sponsor and research team

The lead sponsor funds and oversees the trial. A pharmaceutical or biotech company sponsor typically means the study is testing that company's drug or device; a hospital, university, or government agency usually indicates investigator-initiated or publicly funded research.

Lead sponsor
Clinique Saint Jean, France

Central study contact

If you're interested in participating, the central contact can answer general questions about the study — including eligibility requirements and how to find a recruiting site near you. Actual eligibility is determined by the site's medical team.

Participating sites (1)

Terms used on this page · explanations by MedicalUpdates.ai

biopsy
Removal of a small piece of tissue so it can be examined under a microscope. 'Biopsy-proven' or 'histologically confirmed' means the diagnosis was confirmed by examining tissue under a microscope.
informed consent
The process of explaining a study, including its risks and what participation involves, so that a person can decide freely whether to take part. Consent is usually documented in writing, and a participant can choose to leave the study later.
Inclusion Criteria
The conditions a person must meet to be considered for the study, for example a confirmed diagnosis, an age range or a test result.
Exclusion Criteria
The conditions that rule a person out even if they meet the inclusion criteria, for example other illnesses, certain medicines or pregnancy.

The study record on this page is reproduced from ClinicalTrials.gov, a database of the U.S. National Library of Medicine, where it was submitted by the study sponsor. MedicalUpdates.ai does not own this content, is not affiliated with or endorsed by ClinicalTrials.gov, NIH, or the U.S. Government, and does not verify the record. Plain-language notes, the glossary and the questions above are added by this site; text in the boxes marked "AI summary" was written by an AI model and may contain errors. Registry records change over time. Check the original record for the current version and discuss eligibility or participation with a qualified healthcare professional.

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