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The participant will receive 12 weeks (4 cycles) of VAC chemotherapy (vincristine, dactinomycin and cyclophosphamide) followed by 12 weeks (4 cycles) of VA chemotherapy (vincristine, dactinomycin).

Each cycle of VAC/VA chemotherapy will last for 3 weeks, for a total of 12 weeks (VAC or VA will be given in Week 1 of each cycle and vincristine will be given Weeks 2 and 3). At week 12, the participant will have scans and tests to reevaluate your tumor's response to the treatment. After surgery and radiation, the participant will receive an additional 12 weeks (4 cycles) of the same chemotherapy without cyclophosphamide. Vincristine and dactinomycin, also called "VA". After 4 cycles of VA, The investigator will re-evaluate the tumor again at week 24 and the patient will not get any more chemotherapy, but will be closely watched for any signs of tumor recurrence.

The purpose of this part of the study is to find out if adding a drug called liposomal irinotecan (also called Onivyde) to standard chemotherapy/radiation/surgery will result in better treatment outcomes for patients with intermediate and high risk rhabdomyosarcoma. The investigators also want to find the best radiation dose to give for intermediate and high risk patients who have large tumors (\> 5 cm).

The patient will receive 42 weeks of VAC chemotherapy (vincristine, actinomycin D/dactinomycin and cyclophosphamide) alternating with VLI chemotherapy (vincristine/liposomal irinotecan). The participant will also have surgery to remove the tumor and radiation therapy during this time. After this therapy is completed you will get an additional 6 months of maintenance chemotherapy with vinorelbine and oral (by mouth) cyclophosphamide.

The purpose of this part of the study is to find out if adding a drug called liposomal irinotecan (also called Onivyde) to standard chemotherapy/radiation/surgery will result in better treatment outcomes for patients with high risk rhabdomyosarcoma. The investigator also want to find the best radiation dose to give for high risk patients who have large tumors (\> 5 cm).

The patient will receive 42 weeks of VAC chemotherapy (vincristine, actinomycin D/dactinomycin and cyclophosphamide) alternating with VLIT chemotherapy (vincristine/liposomal irinotecan/temozolomide). Also having surgery to remove the participants tumor and radiation therapy during this time. After this therapy is completed the patient will get an additional 6 months of maintenance chemotherapy with vinorelbine and oral (by mouth) cyclophosphamide.

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

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

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

Surgical Resection

Proton beam radiation or external beam radiation or brachytherapy

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.

Liposomal irinotecan

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.

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.

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.

Filgrastim, peg-filgrastim

Alberto Pappo, MD

Raya Saab, MD

Karen Albritton, MD

Karen Albritton

This is a phase I-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.

Primary Objective

* The primary objective of the Phase I part is to estimate the maximum tolerated doses (MTDs) and recommended Phase II doses (RP2Ds) 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.
* Estimate event-free survival for intermediate-risk participants treated with VAC and vincristine and liposomal irinotecan (VLI) with the addition of maintenance therapy with vinorelbine and cyclophosphamide.
* Estimate the event-free survival for high-risk patients treated with VAC and vincristine, liposomal irinotecan, and temozolomide with the addition of maintenance therapy with vinorelbine and cyclophosphamide.
* Estimate the local recurrence rate for unresected intermediate- and high-risk patients with initial tumor size with ≥5 cm randomized to between 59.4 GyRBE and 68 GyRBE total proton radiation dose while receiving VAC/VLI (intermediate-risk) or VAC/VLI plus temozolomide (high-risk) and maintenance therapy.

Secondary Objectives

* To assess the relation between pharmacogenetic variation in CEP72 genotype and vinca alkaloid (vincristine; vinorelbine) disposition in children with rhabdomyosarcoma.
* To assess the relation between the pharmacogenetic variation in drug metabolizing enzymes and drug transporters, and the pharmacokinetics of vinca alkaloids, liposomal irinotecan, and cyclophosphamide in children with rhabdomyosarcoma.
* To assess the extent of inter-patient variability in the pharmacokinetics of vinca alkaloids, liposomal irinotecan, and cyclophosphamide in children with rhabdomyosarcoma, and explore possible associations between drug disposition and patient specific covariates (e.g., age, sex, race, weight).
* Estimate the cumulative incidence of local recurrence in patients with low-risk disease treated with either no adjuvant radiation or minimal volume radiation.

This is a phase I-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. The phase I part (dose-finding phase) is a dose-escalation part using the BOIN design with maximally 18 patients for each of groups (intermediate -risk, high-risk, and intermediate -and-high-risk-with-early-radiation). Phase I part is to find the maximum tolerated dose and recommended phase II dose for the subsequent phase II part. Phase II part has two primary objectives. The first objective will derive the sample size and it is for efficacy and the endpoint is defined as a 2-year event-free survival (EFS) for each stratum, with 4 years enrollment and 2 years follow-up for each patient, by 80% power and 5% type I error rate, a single-arm adaptive phase II design is used to have estimated numbers of patients for intermediate-risk and high-risk groups are 46 and 33, respectively. The study will end once the last enrolled patient has been followed by 2 years. The second objective is to evaluate the local recurrence rate (LRR) of patients with tumor size ≥ 5cm by using a 2:1 randomization design of comparing administration of the two radiation strategies, 59.4 GyRBE and 68 GyRBE. For this part, 27 additional patients will be required.

Treatment of Newly Diagnosed Rhabdomyosarcoma Using Molecular Risk Stratification and Liposomal Irinotecan Based Therapy in Children With Intermediate and High Risk Disease

A Protocol for the Treatment of Newly Diagnosed Rhabdomyosarcoma Using Molecular Risk Stratification and Liposomal Irinotecan Based Therapy in Children With Intermediate and High Risk Disease

Individual participant de-identified datasets containing the variables analyzed in the published article will be made available (related to the study primary or secondary objectives contained in the publication). Supporting documents such as the protocol, statistical analyses plan, and informed consent are available through the CTG website for the specific study. Data used to generate the published article will be made available at the time of article publication. Investigators who seek access to individual level de-identified data will contact the computing team in the Department of Biostatistics (ClinTrialDataRequest@stjude.org) who will respond to the data request

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.

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.

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).

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Spots Global Cancer Trial Database for proton beam radiation or external beam radiation or brachytherapy