131I-omburtamab Radioimmunotherapy for Neuroblastoma Central Nervous System/Leptomeningeal Metastases

  • End date
    Dec 29, 2026
  • participants needed
  • sponsor
    Y-mAbs Therapeutics
Updated on 16 February 2022
monoclonal antibodies


Children with a neuroblastoma diagnose and central nervous system (CNS)/leptomeningeal metastases will be given up to 2 rounds of intracerebroventricular treatment with a radiolabelled monoclonal antibody, 131I-omburtamab to evaluate efficacy and safety


One 131I-omburtamab treatment cycle takes 4 weeks and includes a treatment dose, and an observation period and post-treatment evaluations.

One 131I-omburtamab treatment cycle for Japan only takes 5 weeks and includes a dosimetry dose (2mCi) of 131I-omburtamab is administered during week 1 followed by blood/cerebral spinal fluid (CSF) samples and whole-body scintigraphy at predefined intervals during the following 48 hours after treatment.

  • A therapeutic dose (50mCi) of 131I-omburtamab is administered during week 1 (week 2 for Japan) followed by a 3-week observation period that includes a repeated MRI, CSF cytology, and safety monitoring.
  • A second treatment cycle of 131I-omburtamab is administered during week 5 (week 6 for Japan) if there is no objective disease progression week 5 after the first injection, and the participant is presenting without unexpected and clinical significant Grade 4 toxicity. For participants with ongoing Grade 3 toxicity a second doing cycle will take place according to the discretion of the investigator.

Participants can be treated in an outpatient setting or may be admitted as inpatients for both the dosimetry and the therapeutic injections.

Participants completing at least one treatment period will first enter a follow-up period through week 26 and thereafter the long-term follow-up where patients will be evaluated for up to 3 years post-131I-omburtamab treatment where after the trial is ended

Participants will be monitored for adverse events during and after 131I-omburtamab injection and will have pre- and post-treatment clinical assessments including neurologic examination, hematology and serum chemistry, blood and CSF cultures, endocrinology assessments, CSF analysis, and, pre- and post 131I-omburtamab performance testing. Performance testing will be performed at trial baseline, at week 26 and every 6 months during trial period.

In case the patient has a subsequent relapse in the CNS/LM after 131I-omburtamab therapy during the follow-up period, re-treatment to target minimal residual disease can be considered and allowed.

Condition Neuroblastoma, CNS Metastases, Leptomeningeal Metastases
Treatment 131I-omburtamab
Clinical Study IdentifierNCT03275402
SponsorY-mAbs Therapeutics
Last Modified on16 February 2022


Yes No Not Sure

Inclusion Criteria

Patients must have a histologically confirmed diagnosis of neuroblastoma with relapse in the central nervous system or in the meninges (leptomeningeal)
Patients must be between the ages of birth and 18 years at the time of screening
Patients must have a life expectancy of at least 3 months

Exclusion Criteria

Patients with primary neuroblastoma in central nervous system
Patients must not have an uncontrolled life-threatening infection
Patients must not have received cranial or spinal irradiation less than 3 weeks prior to first dose of 131I-omburtamab in this trial
Patients must not have received systemic chemotherapy (corticosteroids not included) less than 3 weeks prior to enrollment in this trial
Patients must not have severe major non-hematologic organ toxicity; specifically, any renal, cardiac, hepatic, pulmonary, and gastrointestinal system toxicity must fall below Grade 3 prior to enrollment in this trial. Patients with stable neurological deficits (due to brain tumor) are not excluded. Patients with Grade 3 or lower hearing loss are not excluded
Clear my responses

How to participate?

Step 1 Connect with a study center
What happens next?
  • You can expect the study team to contact you via email or phone in the next few days.
  • Sign up as volunteer to help accelerate the development of new treatments and to get notified about similar trials.

You are contacting

Investigator Avatar

Primary Contact



Additional screening procedures may be conducted by the study team before you can be confirmed eligible to participate.

Learn more

If you are confirmed eligible after full screening, you will be required to understand and sign the informed consent if you decide to enroll in the study. Once enrolled you may be asked to make scheduled visits over a period of time.

Learn more

Complete your scheduled study participation activities and then you are done. You may receive summary of study results if provided by the sponsor.

Learn more

Similar trials to consider


Browse trials for

Not finding what you're looking for?

Every year hundreds of thousands of volunteers step forward to participate in research. Sign up as a volunteer and receive email notifications when clinical trials are posted in the medical category of interest to you.

Sign up as volunteer

user name

Added by • 



Reply by • Private

Lorem ipsum dolor sit amet consectetur, adipisicing elit. Ipsa vel nobis alias. Quae eveniet velit voluptate quo doloribus maxime et dicta in sequi, corporis quod. Ea, dolor eius? Dolore, vel!

  The passcode will expire in None.

No annotations made yet

Add a private note
  • abc Select a piece of text from the left.
  • Add notes visible only to you.
  • Send it to people through a passcode protected link.
Add a private note