Assessing the effectiveness of teclistamab for multiple myeloma

Prospective Observational Study on the Clinical Efficacy of Teclistamab in Patients With Relapsed and Refractory Multiple Myeloma in Belgium

Universitaire Ziekenhuizen KU Leuven · NCT06477783

This study is testing if teclistamab can help people with relapsed or hard-to-treat multiple myeloma who have already tried at least three other treatments.

Quick facts

Study typeObservational
Enrollment100 (estimated)
Ages18 Years and up
SexAll
SponsorUniversitaire Ziekenhuizen KU Leuven (other)
Drugs / interventionsteclistamab
Locations17 sites (Bonheiden, Antwerpen and 16 other locations)
Trial IDNCT06477783 on ClinicalTrials.gov

What this trial studies

This observational study aims to evaluate the clinical efficacy and safety of teclistamab (Tecvayli®) in patients with relapsed or refractory multiple myeloma who have undergone at least three prior treatments. Participants will be monitored in a real-life setting in Belgium for a duration of up to 24 months, with monthly follow-ups for the first six months and subsequent assessments every three months. The study will track patient responses and any adverse effects associated with the treatment.

Who should consider this trial

Good fit: Ideal candidates include adults aged 18 and older with relapsed and refractory multiple myeloma who have received at least three prior lines of treatment.

Not a fit: Patients who have previously participated in a teclistamab trial or have started teclistamab treatment more than 14 days before screening may not benefit from this study.

Why it matters

Potential benefit: If successful, this study could provide valuable insights into the effectiveness of teclistamab for patients with difficult-to-treat multiple myeloma.

How similar studies have performed: Other studies have shown promising results with similar bispecific antibody approaches in treating multiple myeloma, suggesting potential for success in this study.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Age 18 years or older
* Written informed consent
* Has a diagnosis of relapsed and refractory multiple myeloma
* Has already received at least three previous treatments
* Is refractory to at least 1 proteasome inhibitor, at least 1 immunomodulatory agent, and an anti-CD38 monoclonal antibody
* Evidence of disease progression on the last line of therapy, based on determination of response by the IMWG response criteria
* Anticipated to start treatment with teclistamab per routine clinical care or has started with teclistamab treatment ≤14 days before intended screening visit

Exclusion Criteria:

* Has participated in a teclistamab trial (teclistamab or control arm) or teclistamab Single Patient Request (SPR) program
* Has started teclistamab treatment \>14 days before intended screening visit.

Where this trial is running

Bonheiden, Antwerpen and 16 other locations

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.

View on ClinicalTrials.gov →

Conditions: Multiple Myeloma, Hematologic Diseases, Teclistamab, Tecvayli, Hematology, Efficacy, Safety

Last reviewed 2026-05-15 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.