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A Study of the Drug I131-Omburtamab in People With Desmoplastic Small Round Cell Tumors and Other Solid Tumors in the Peritoneum

Phase II Combination of 131I-Omburtamab Radioimmunotherapy and External Beam Radiotherapy for Desmoplastic Small Round Cell Tumor

Status
Active, not recruiting
Phases
Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT04022213
Enrollment
31
Registered
2019-07-17
Start date
2019-07-15
Completion date
2027-07-01
Last updated
2026-07-21

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Desmoplastic Small Round Cell Tumor, Peritoneal Cancer, Peritoneal Carcinoma

Keywords

Solid Tumor, Peritoneal Solid Tumor, DSRC, I131-Omburtamab, Memorial Sloan Kettering Cancer Center, 19-182

Brief summary

The purpose of this study is to test any good and bad effects of the study drug 131I-omburtamab. 131I-omburtamab could prevent the cancer from returning, or delay the cancer from getting worse, but it could also cause side effects. Researchers hope to learn more about how 131I-omburtamab works in the body, and how effective it is in treating cancer. 131I-Omburtamab is not approved by the FDA to treat DSRCT or other cancers of the peritoneum.

Interventions

DRUG131 I-omburtamab

Single dose of IP RIT administered through an IP catheter with 131 I-omburtamab at 80mCi/m2

RADIATIONWAP-IMRT

Group A participants will receive WAP-IMRT approximately 2-4 weeks after completing IP RIT. A dose of 30 Gy will be delivered in 20 fractions of 1.5 Gy given once daily, 5 days per week over the course of approximately 4 weeks

Sponsors

Memorial Sloan Kettering Cancer Center
Lead SponsorOTHER
Y-mAbs Therapeutics
CollaboratorINDUSTRY

Study design

Allocation
NON_RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
1 Years to No maximum
Healthy volunteers
No

Inclusion criteria

* Have the diagnosis of DSRCT confirmed at MSKCC * Age \>1 year and able to cooperate with radiation safety restrictions during therapy period. * Prior to intraperitoneal catheter placement * At least 1 weeks must have elapsed since prior chemotherapy * At least 2 weeks must have elapsed since biologic therapy * Toxicities of prior therapy must have resolved to grade 1 or less or to the patient's baseline At the completion of surgery, patients must fulfill all of the additional following criteria: * Have no definitive radiological evidence of disease active in liver or outside the abdomen/pelvic OR have had GTR of this disease at the time of catheter placement

Exclusion criteria

* Prior progression of disease * Prior hypothermic intraperitoneal chemotherapy (HIPEC) * Cardiac, pulmonary, and neurologic toxicities are greater grade 1 per NCI CTCAE version 5 * Renal, gastrointestinal, and hepatic, toxicities are greater than grade 2 (per NCI CTCAE version 5) * History of allergy to mouse proteins * Patients with grade 4 hypersensitivity reaction to radiolabeled iodine

Design outcomes

Primary

MeasureTime frameDescription
Progression Free Survival/PFSUp to 2 years after treatment is discontinuedProgression free survival after RIT + WA-IMRT.

Countries

United States

Contacts

PRINCIPAL_INVESTIGATOREmily Slotkin, MD

Memorial Sloan Kettering Cancer Center

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Jul 22, 2026