NCT06023641 · St. Jude Children's Research Hospital
Treatment of Newly Diagnosed Rhabdomyosarcoma Using Molecular Risk Stratification and Liposomal Irinotecan Based Therapy in Children With Intermediate and High Risk Disease
What this study is about
This is a phase II study to determine safety and effectiveness of combining liposomal irinotecan with vincristine alternating with VAC in intermediate-risk patients, liposomal irinotecan with temozolomide and vincristine alternating with VAC in high-risk patients and the chemotherapy combinations when given with concomitant radiation therapy in intermediate and high risk patients.
View original scientific description
This is a phase II study to determine safety and efficacy of combining liposomal irinotecan with vincristine alternating with VAC in intermediate-risk patients, liposomal irinotecan with temozolomide and vincristine alternating with VAC in high-risk patients and the chemotherapy combinations when given with concomitant radiation therapy in intermediate and high risk patients.
Interventions
DRUG
Vincristine
Low -risk Administer IV push over 1 minute (or infusion via minibag as per institutional standards) on Day 1 of Weeks 1,8, 15 (3) doses. The maximum dose is 2 mg for all participants. Intermediate-risk Administer IV, over 1 minute, 3 doses, weekly on day1 High-risk Administer by IV infusion over 1 minute, 3 doses, weekly on day 1,8,15
DRUG
Dactinomycin
Low-risk Administer by slow IV push over 1-5 minutes on Day 1 of Weeks 1, (1) dose. The maximum dose is 2.5 mg for all participants. Intermediate-risk Administer by slow IV over 1-5 minutes., 1 doses weekly on day 1 High-risk Administer by slow IV over 1-5 minutes, day1
DRUG
Cyclophosphamide
Low-risk Administer by IV infusion over 30-60 minutes on Day 1, 91) dose, Mesna and hydration will be given with IV cyclophosphamide according to institutional standards. Intermediate-risk Administer by IV infusion over 30-60 minutes, 1 dose, day 1 High-risk Administer by IV infusion over 30-60 minutes, 1 dose, day1
PROCEDURE
Surgical Resection
Low, Intermediate and High-risk
PROCEDURE
Proton beam radiation or external beam radiation or brachytherapy
Low, Intermediate and High-risk
DRUG
Liposomal irinotecan
Intermediate and High-risk Administer by IV infusion over 90 minutes, 1 dose on day 1 Liposomal irinotecan should be premedicated with dexamethasone (or an equivalent corticosteroid) if not contraindicated. Premedication with diphenhydramine and an H2 receptor antagonist (i.e., famotidine) are also encouraged.
DRUG
Vinorelbine
Intermediate and High-risk Administer via slow IV push over 6-10 minutes (or infusion via minibag as per institutional standards) on Day 1 of Weeks 43-45, 47-49, 51-53, 55-57, 59-61, 63-65.
DRUG
Temozolomide
High-risk Administer PO (or by NG or G tube) 5 doses, on Days 1-5 When administering with liposomal irinotecan, administer temozolomide prior to liposomal irinotecan. Preferably, administer on an empty stomach (at least 1 hour before and 2 hours after food) to improve absorption. When using temozolomide capsules, round dose to the nearest 5 mg capsule. The capsule may be opened, and contents mixed with applesauce or apple juice. A compounded oral suspension is also available. If emesis occurs within 20 minutes of taking a dose of temozolomide, then the dose may be repeated once.
DRUG
Filgrastim, peg-filgrastim
Low, Intermediate and High-risk: Prophylactic myeloid growth factor support (Filgrastim or Pegfilgrastim) should be used after all VAC cycles for patients on the high-risk arm. Start myeloid growth factor support (for example, filgrastim 5 mcg/kg/dose SubQ daily until the ANC is ≥ 2000/μL after the expected nadir OR pegfilgrastim 0.1 mg/kg/dose \[for patients \< 45 kg\] or 6 mg/dose \[for patients ≥ 45 kg\] SubQ x 1 dose) 24-48 hours after VAC cycles. Filgrastim may be continued without regard to VCR. Discontinue filgrastim at least 24 hours before the start of the next cycle. Prophylactic myeloid growth factor support should NOT be used after VLIT cycles or during maintenance chemotherapy.
Primary outcome measures
Maximum tolerated doses (MTDs)
Time frame: 4 years
MTD is defined in the study as the highest treatment dose that would deliver desirable treatment effects without resulting in a target toxicity rate greater than 0.3. For each of three groups (intermediate-risk, high-risk, and intermediate-and-high-risk-with-early-radiation), we will employ the Bayesian optimal interval (BOIN) design to find the MTD.
Event-free survival (EFS)
Time frame: 2 years post, off therapy
We will estimate the 2-year event-free survival for intermediate-risk and high-risk patients, which is the estimated probability of a patient not having any events within the 2-year follow-up. If an event, including local failure, distant failure, death or loss to follow-up occurs for a patient within 2-year, we call it failure, otherwise call it response.
Local recurrence rate (LRR)
Time frame: 2 years
LRR is defined as a binary endpoint in the study. The local recurrence-free survival (LRFS) is defined as time from randomization to the earlier date of the first of local disease recurrence or death due to any cause. The distant failure will be considered to be the competing risk, patients for whom follow-up ended without clinical improvement will be censored. The goal of the local recurrence rate endpoint is to evaluate the 2-year LRR by comparing the administration of 59.4 GyRBE and 68 GyRBE for patients (pooled intermediate- and high-risk groups) with tumor size greater than or equal to 5cm meeting the eligibility criteria for randomization (no biliary tree or specific extremity cases). .
Who can participate
This study lists these criteria on ClinicalTrials.gov. A study coordinator reviews eligibility during screening — this page does not determine whether you qualify.
Inclusion criteria
- • Newly diagnosed participants with the diagnosis of rhabdomyosarcoma (RMS) of any subtype. This includes embryonal rhabdomyosarcoma (fusion negative), alveolar rhabdomyosarcoma (fusion positive), as well as spindle cell and sclerosing • Must have either low-, intermediate-risk or high-risk disease, defined as:
- Low-risk: TP53 and MYOD1 negative AND • Embryonal, congenital/infantile spindle cell, or spindle cell/sclerosing FOXO1 fusion negative histology
- Stage 1 Group I, Group II
- Stage 1 Group III orbital only
- Stage 2 Group I, Group II
- Intermediate-risk: MYOD1 and TP53 negative AND • Embryonal, congenital/infantile spindle cell, or spindle cell/sclerosing FOXO1 fusion negative histology o Stage 1 Group III non orbit o Stage 3 Group I/II o Stage 2/3 Group III
- Stage 4 Group IV and Oberlin 0-1 • Alveolar, spindle cell/sclerosing FOXO1 fusion positive histology
- Stage 1-3, Group I-III N0
- High-risk: All MYOD1 and TP53 mutant tumors regardless of stage and Group AND/OR
- Embryonal, congenital/infantile spindle cell or spindle cell/sclerosing FOXO1 fusion negative o Group IV ≥ 10 year of age and Oberlin ≥ 2
- Alveolar, spindle cell/sclerosing FOXO1 fusion positive
- Stage 4 Group IV See Appendices I and II for Staging and Clinical Grouping. Age \< 22 years (eligible for enrollment until 22nd birthday) • Performance level corresponding to ECOG score of 0, 1, or 2. The Lansky performance score should be used for participants \< 16 years (see Appendix VII).
- Participant has received no prior radiotherapy or chemotherapy for rhabdomyosarcoma (excluding steroids) unless an emergency situation requires local tumor treatment (discuss with PI).
- Initiation of chemotherapy is planned within 6 weeks (42 days) of the definitive biopsy or surgical resection.
- Adequate bone marrow function defined as:
- Peripheral absolute neutrophil count (ANC) ≥ 750/μL
- Platelet count ≥ 75,000/μL (transfusion independent)
- Adequate liver function defined as total bilirubin \< 1.5 x upper limit of normal (ULN) for age. Participants with biliary or hepatic primaries with bilirubin values greater than 1.5 x ULN may be enrolled on study if all other eligibility criteria are met. Adequate renal function defined as: Creatinine clearance or radioisotope GFR \> 70 mL/min/1.732 or serum creatinine based on age as follows: Age Maximum serum creatinine (mg/dL) Male Female 1 month to \< 6 months 0.4 0.4 6 months to \< 1 year 0.5 0.5 Age Maximum serum creatinine (mg/dL)
- to \< 2 years 0.6 0.6
- to \< 6 years 0.8 0.8 6 to \< 10 years 1 1 10 to \< 13 years 1.2 1.2 13 to \< 16 years 1.5 1.4 \> 16 years 1.7 1.4 The threshold creatinine values in this table were derived from the Schwartz formula for estimating GFR25 utilizing child length and stature. Data published by the CDC. Participants with urinary tract obstruction by tumor must meet the renal function criteria listed above AND must have unimpeded urinary flow established via decompression of the obstructed portion of the urinary tract. • Adequate pulmonary function defined as: no evidence of dyspnea at rest and a pulse oximetry \> 94% if there is a clinical indication for determination. Pulmonary function tests are not required. • Patients requiring emergency radiation therapy are eligible for enrollment on this trial. See Section 4.11 for radiation therapy guidelines. • No evidence of active, uncontrolled infection. All participants and/or their parents or legal guardians must sign a written informed consent.
Exclusion criteria
- • Patients who have received any chemotherapy (excluding steroids). • Patients who have received prior full course RT at the primary site of disease. This does not exclude patients that received emergent radiation.
- Ongoing or history of non-infectious interstitial lung disease requiring significant medical intervention.
- Sexually active patients of reproductive potential who have not agreed to use an effective contraceptive method for the duration of their study participation and for at least 3 months after treatment is completed.
- Female patients who are pregnant are not eligible since fetal toxicities or teratogenic effects have been noted for several of the study drugs. Female participants \> 10 years of age or post-menarchal must have a negative serum or urine pregnancy test within 24 hours prior to beginning treatment.
- Lactating females who are or plan to breastfeed their infants are not eligible.
Where
- Palo Alto, California
- Memphis, Tennessee
- Fort Worth, Texas
Related conditions & keywords
Frequently asked questions
What is a clinical trial?
A clinical trial is a research study that tests new medical treatments, drugs, devices, or procedures to determine their safety and effectiveness. Trials are carefully designed and monitored to protect participants while advancing medical knowledge.
Is it safe to participate?
Clinical trials follow strict safety guidelines and ethical standards. Trials must be reviewed and approved, and participants are closely monitored by medical professionals throughout the study. You can withdraw at any time if you choose.
Will I be compensated?
Many clinical trials offer compensation for your time, travel expenses, and inconvenience. The specific compensation varies by study and will be discussed during the screening process. All study-related medical care is typically provided at no cost to participants.
Will I receive a placebo instead of treatment?
When effective treatment exists, participants typically receive either the standard treatment plus the study intervention, or the standard treatment plus placebo. You would not be denied effective care. Placebos are primarily used when no proven treatment is available, or in addition to standard care. Your trial consent form will clearly explain what treatments you may receive.
Can I leave a trial if I change my mind?
Absolutely. Participation in clinical trials is completely voluntary. You have the right to withdraw from the study at any time, for any reason, without penalty or loss of benefits to which you are otherwise entitled.
How long does a clinical trial last?
Trial duration varies widely depending on the study design and purpose. Some trials last just a few weeks, while others may continue for months or years. The study coordinator will provide specific timeline information during your screening call.
Data: ClinicalTrials.gov · synced Jun 15, 2026 · Source of record for eligibility and locations