177Lu-DTPA-Omburtamab Radioimmunotherapy for Recurrent or Refractory Medulloblastoma

Study Purpose

Children and adolescents diagnosed with medullablastoma and with recurrent or refractory to frontline therapy will be treated with 177Lu-DTPA-omburtamab, which is a radioactive labelling of a murine monoclonal antibody targeting B7-H3.

Recruitment Criteria

Accepts Healthy Volunteers

Healthy volunteers are participants who do not have a disease or condition, or related conditions or symptoms

Study Type

An interventional clinical study is where participants are assigned to receive one or more interventions (or no intervention) so that researchers can evaluate the effects of the interventions on biomedical or health-related outcomes.

An observational clinical study is where participants identified as belonging to study groups are assessed for biomedical or health outcomes.

Searching Both is inclusive of interventional and observational studies.

Eligible Ages 3 Years - 19 Years
Gender All
More Inclusion & Exclusion Criteria

Inclusion Criteria:

  • - Histologically confirmed diagnosis of medulloblastoma.
  • - Available molecular classification according to World Health Organisation (WHO) 2016 classification, as follows: - WNT, SHH, Group 3, or Group 4 for patients enrolled to Part 1.
  • - SHH, Group 3, or Group 4 for patients enrolled to Part 2.
  • - Recurrent (maximum of 2 recurrences for Part 1 and 1 recurrence for Part 2) or refractory to frontline therapy.
Prior frontline or second line therapy may involve surgery, craniospinal irradiation, stereotactic radiosurgery, and multi-agent chemotherapy regimens.
  • - Be in cytological or radiographic remission, have residual disease, multifocal recurrent disease, or pure leptomeningeal disease.
  • - Performance status score of 50 to 100 on Lansky (less than 16 years) or Karnofsky (16 years or older) scales.
  • - Life expectancy of at least 3 months, as judged by the Investigator.
  • - Acceptable hematological status and liver and kidney function.

Exclusion Criteria:

  • - Obstructive or symptomatic communicating hydrocephalus as determined by Ommaya patency/cerebrospinal fluid (CSF) flow study.
  • - Residual disease (nodular or linear) measuring > 5 mm in the smallest diameter.
  • - Ventriculoperitoneal shunts without programmable valves.
Ventriculo-atrial or ventriculo-pleural shunts.
  • - Grade 4 neurotoxicity.
Grade 3 or lower stable neurological deficits (due to brain tumor) or hearing loss are allowed.
  • - Uncontrolled life-threatening infection.
  • - Received radiation therapy less than 3 weeks prior to the screening visit.
  • - Received systemic or intrathecal cytotoxic chemotherapy or intrathecal immunotherapy (corticosteroids not included) less than 3 weeks prior to the screening visit.
  • - Received any prior anti-B7-H3 treatment.
  • - Non-hematologic organ toxicity Grade 3 or above; specifically, any renal, cardiac, hepatic, pulmonary, and gastrointestinal system toxicity.

Trial Details

Trial ID:

This trial id was obtained from ClinicalTrials.gov, a service of the U.S. National Institutes of Health, providing information on publicly and privately supported clinical studies of human participants with locations in all 50 States and in 196 countries.


Phase 1: Studies that emphasize safety and how the drug is metabolized and excreted in humans.

Phase 2: Studies that gather preliminary data on effectiveness (whether the drug works in people who have a certain disease or condition) and additional safety data.

Phase 3: Studies that gather more information about safety and effectiveness by studying different populations and different dosages and by using the drug in combination with other drugs.

Phase 4: Studies occurring after FDA has approved a drug for marketing, efficacy, or optimal use.

Phase 1/Phase 2
Lead Sponsor

The sponsor is the organization or person who oversees the clinical study and is responsible for analyzing the study data.

Y-mAbs Therapeutics
Principal Investigator

The person who is responsible for the scientific and technical direction of the entire clinical study.

Principal Investigator Affiliation N/A
Agency Class

Category of organization(s) involved as sponsor (and collaborator) supporting the trial.

Overall Status Not yet recruiting

The disease, disorder, syndrome, illness, or injury that is being studied.

Medulloblastoma, Childhood
Additional Details

Part 1 is a dose-escalation phase with a 3+3 sequential-group design in which patients will receive a dosimetry dose followed by maximum of two 5-week cycles of treatment doses of intracerebroventricular 177Lu-DTPA-omburtamab. Part 2 is a cohort-expansion phase in which patients will receive a maximum of five 5-week cycles of intracerebroventricular 177Lu-DTPA-omburtamab at the recommended dose determined in Part 1. End of treatment will take place within 5 weeks after the last cycle and thereafter the patients will be enter the follow-up period. The patients will be followed for up to 2 years after last dose.

Arms & Interventions


Experimental: 177Lu-DTPA-omburtamab

Intracerebroventricular administration of 177Lu-DTPA-omburtamab for up to two cycles (Part 1) and up to five cycles (Part 2).


Drug: - 177Lu-DTPA-omburtamab

Biological, radiolabeled DPTA-omburtamab

Contact Information

This trial has no sites locations listed at this time. If you are interested in learning more, you can contact the trial's primary contact:

Joris Wilms



For additional contact information, you can also visit the trial on clinicaltrials.gov.

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