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Updated May 2026 · ClinicalTrials.gov

RECRUITINGPhase 2 / Phase 3INTERVENTIONAL

A Study to Test the Addition of the Drug Cabozantinib to Chemotherapy in Patients With Newly Diagnosed Osteosarcoma

A Feasibility and Randomized Phase 2/3 Study of the VEGFR2/MET Inhibitor Cabozantinib in Combination With Cytotoxic Chemotherapy for Newly Diagnosed Osteosarcoma

A Study to Test the Addition of the Drug Cabozantinib to Chemotherapy in Patients With Newly Diagnosed Osteosarcoma (NCT05691478) is a Phase 2 / Phase 3 interventional studying High Grade Osteosarcoma and Localized Osteosarcoma, sponsored by National Cancer Institute (NCI). RECRUITING as of the most recent ClinicalTrials.gov update. Talk to your doctor before contacting the trial site.

Important: This information is not medical advice. Talk to your doctor about whether a clinical trial is right for you.

About This Trial

This phase II/III trial tests the safety, side effects, and best dose of the drug cabozantinib in combination with standard chemotherapy, and to compare the effect of adding cabozantinib to standard chemotherapy alone in treating patients with newly diagnosed osteosarcoma. Cabozantinib is in a class of medications called kinase inhibitors which block protein signals affecting new blood vessel formation and the ability to activate growth signaling pathways. This may help slow the growth of tumor cells. The drugs used in standard chemotherapy for this trial are methotrexate, doxorubicin, and cisplatin (MAP). Methotrexate stops cells from making DNA and may kill tumor cells. It is a type of antimetabolite. Doxorubicin is in a class of medications called anthracyclines. It works by slowing or stopping the growth of tumor cells in the body. Cisplatin is in a class of medications known as platinum-containing compounds. It works by killing, stopping or slowing the growth of tumor cells. Adding cabozantinib to standard chemotherapy may work better in treating newly diagnosed osteosarcoma.

What Stage of Research Is This?

Phase 2 trials evaluate whether a treatment actually works against High Grade Osteosarcoma and continue monitoring side effects. Phase 2 enrolls larger groups (typically 100–300 patients) and produces the first real efficacy signal. A successful Phase 2 readout is what unlocks the much larger Phase 3 confirmatory trials needed for FDA approval.

This trial is currently recruiting participants. The sponsor has registered the study with ClinicalTrials.gov as actively enrolling, which means new applicants who meet the eligibility criteria can be considered for screening. Trial status can change between updates — confirm current recruiting status with the study contact before traveling for a screening visit.

A target enrollment of 1,122 participants makes this a sizable late-stage trial. Studies in this range typically have enough power to detect clinically meaningful differences from a comparator and to characterize less-common side effects.

Who May Be Eligible (Plain English)

Who May Qualify: - Patients must be \< 40 years of age at the time of enrollment. - Patients must have a body surface area of \>= 0.8 m\^2 at the time of enrollment. - Patients must have histologic diagnosis (by institutional pathologist) of newly diagnosed high grade osteosarcoma. Primary tumors of all extremity and axial sites are eligible as long as diagnosis of high-grade osteosarcoma is established. Osteosarcoma as a second malignancy is eligible if no prior exposure to systemic chemotherapies. - Feasibility Phase (NOTE: as of Amendment #2B, the feasibility phase has been completed) Patients must have metastatic disease and a resectable primary tumor. Designation of a primary tumor as resectable will be determined at the time of diagnosis by the institutional multidisciplinary team. For this study, metastatic disease is defined as one or more of the following: - Lesions which are discontinuous from the primary tumor, are not regional lymph nodes, and do not share a bone or body cavity with the primary tumor. Skip lesions in the same bone as the primary tumor do not constitute metastatic disease. Skip lesions in an adjacent bone are considered bone metastases. - Lung metastases: defined as biopsy-proven metastasis or the presence of one or more pulmonary lesions \>= 5 mm, OR multiple pulmonary lesions \>= 3 mm or greater in size. - Bone metastases: Areas suspicious for bone metastasis based on fludeoxyglucose F-18 (18F-FDG)-positron emission tomography (PET) scan (or whole body technetium-99 bone scan if 18F-FDG-PET is unavailable at the treating institution) require confirmatory biopsy or supportive anatomic imaging of at least one suspicious site with either magnetic resonance imaging (MRI) or computed tomography (CT) (whole body 18F-FDG-PET/CT or 18F-FDG-PET/MR scans are acceptable). - Efficacy Phases (Phase 2/3) NOTE: as of Amendment #2B, the efficacy phase is open for enrollment. ...See full criteria on ClinicalTrials.gov Always talk to your doctor about whether this trial is right for you.

These are translations of the protocol\'s inclusion and exclusion criteria, simplified for patients and caregivers. The original clinical text appears below. Eligibility is ultimately confirmed by the trial site\'s screening process — this summary is a starting point for a conversation with your doctor, not a final determination.

Original Eligibility Criteria

View original clinical language
Inclusion Criteria: * Patients must be \< 40 years of age at the time of enrollment. * Patients must have a body surface area of \>= 0.8 m\^2 at the time of enrollment. * Patients must have histologic diagnosis (by institutional pathologist) of newly diagnosed high grade osteosarcoma. Primary tumors of all extremity and axial sites are eligible as long as diagnosis of high-grade osteosarcoma is established. Osteosarcoma as a second malignancy is eligible if no prior exposure to systemic chemotherapies. * Feasibility Phase (NOTE: as of Amendment #2B, the feasibility phase has been completed) Patients must have metastatic disease and a resectable primary tumor. Designation of a primary tumor as resectable will be determined at the time of diagnosis by the institutional multidisciplinary team. For this study, metastatic disease is defined as one or more of the following: * Lesions which are discontinuous from the primary tumor, are not regional lymph nodes, and do not share a bone or body cavity with the primary tumor. Skip lesions in the same bone as the primary tumor do not constitute metastatic disease. Skip lesions in an adjacent bone are considered bone metastases. * Lung metastases: defined as biopsy-proven metastasis or the presence of one or more pulmonary lesions \>= 5 mm, OR multiple pulmonary lesions \>= 3 mm or greater in size. * Bone metastases: Areas suspicious for bone metastasis based on fludeoxyglucose F-18 (18F-FDG)-positron emission tomography (PET) scan (or whole body technetium-99 bone scan if 18F-FDG-PET is unavailable at the treating institution) require confirmatory biopsy or supportive anatomic imaging of at least one suspicious site with either magnetic resonance imaging (MRI) or computed tomography (CT) (whole body 18F-FDG-PET/CT or 18F-FDG-PET/MR scans are acceptable). * Efficacy Phases (Phase 2/3) NOTE: as of Amendment #2B, the efficacy phase is open for enrollment. Patients with both localized and metastatic disease are eligible for the efficacy phase, regardless of resectability. Patients will be enrolled to two separate cohorts: * Cohort 1 (Standard Risk): Patients with non-pelvic primary osteosarcoma deemed to be resectable at the time of diagnosis by the institutional multidisciplinary team, without evidence of metastatic lesions. * Cohort 2 (High-Risk): Patients with a primary pelvic tumor, a primary tumor designated as unresectable by the institutional multidisciplinary team, AND/OR radiographic evidence of metastatic lesions. * A serum creatinine based on age/sex as follows (within 7 days prior to enrollment unless otherwise indicated): * (Age: Maximum Serum Creatinine \[mg/dL\]; Sex) * 1 month to \< 6 months: 0.4 (male); 0.4 (female) * 6 months to \< 1 year: 0.5 (male); 0.5 (female) * 1 to \< 2 years: 0.6 (male); 0.6 (female) * 2 to \< 6 years: 0.8 (male); 0.8 (female) * 6 to \< 10 years: 1 (male); 1 (female) * 10 to \< 13 years: 1.2 (male); 1.2 (female) * 13 to \< 16 years: 1.5 (male); 1.4 (female) * \>= 16 years: 1.7 (male); 1.4 (female) * OR - a 24 hour urine creatinine clearance \>= 70 mL/min/1.73 m\^2 * OR - a glomerular filtration rate (GFR) \>= 70 mL/min/1.73 m\^2. GFR must be performed using direct measurement with a nuclear blood sampling method OR direct small molecule clearance method (iothalamate or other molecule per institutional standard). * Note: Estimated GFR (eGFR) from serum creatinine, cystatin C or other estimates are not acceptable for determining eligibility. * Total bilirubin =\< 1.5 x upper limit of normal (ULN) for age (within 7 days prior to enrollment unless otherwise indicated) * Serum glutamate pyruvate transaminase (SGPT) (alanine aminotransferase \[ALT\]) =\< 135 U/L (within 7 days prior to enrollment unless otherwise indicated) * Note: For the purpose of this study, the ULN for SGPT (ALT) has been set to the value of 45 U/L * No history of congenital prolonged corrected QT (QTc) syndrome, New York Heart Association (NYHA) Class III or IV congestive heart failure, unstable angina pectoris, serious cardiac arrhythmias * Shortening fraction of \>= 27%, or * Ejection fraction of \>= 50% * Corrected QT interval by Fridericia (QTcF) \< 480 msec on electrocardiogram. Patients with Grade 1 prolonged QTc (450-480 msec) at time of study enrollment should have correctable causes of prolonged QTc addressed if possible (i.e., electrolytes, medications). * Peripheral absolute neutrophil count (ANC) \>= 1000/uL (within 7 days prior to enrollment unless otherwise indicated) * Platelet count \>= 100,000/uL (transfusion independent, defined as not receiving platelet transfusions within a 7-day period prior to enrollment) (within 7 days prior to enrollment unless otherwise indicated) * Hemoglobin \>= 8.0 g/dL (within 7 days prior to enrollment unless otherwise indicated) * International normalized ratio (INR) =\< 1.5 (within 7 days prior to enrollment unless otherwise indicated) * Human immunodeficiency virus (HIV)-infected patients on effective anti-retroviral therapy with undetectable viral load within 6 months are eligible as long as they are NOT receiving anti-retroviral agents that are strong inhibitors or inducers of CYP3A4, CYP2D6, and/or MRP2 transporter protein. * All patients and/or their parents or legal guardians must sign a written informed consent. * All institutional, Food and Drug Administration (FDA), and National Cancer Institute (NCI) requirements for human studies must be met. Exclusion Criteria: * Patients who have received previous systemic therapy for osteosarcoma or a prior oncologic diagnosis. * Patients who have central nervous system metastases. * Patients with central cavitating pulmonary lesions invading or encasing any major blood vessels in the lung. * Patients who are unable to swallow tablets. Tablets cannot be crushed or chewed. * Patients with gastrointestinal disorders including active disorders associated with a high risk of perforation or fistula formation. Specifically, no clinically significant gastrointestinal (GI) bleeding, GI perforation, bowel obstruction, intra-abdominal abscess or fistula for 6 months prior to enrollment, no hemoptysis or other signs of pulmonary hemorrhage for 3 months prior to enrollment. * Patients with active bleeding or bleeding diathesis. No clinically significant hematuria, hematemesis, or hemoptysis or other history of significant bleeding within 3 months prior to enrollment. * Patients with uncompensated or symptomatic hypothyroidism. Patients who have hypothyroidism controlled with thyroid replacement hormone are eligible. * Patients with moderate to severe hepatic impairment (Child-Pugh B or C). * Patients who have had primary tumor resection or attempted curative resection of metastases prior to enrollment. * Patients who have undergone other major surgical procedure (eg, laparotomy) within 14 days prior to enrollment. Thoracoscopic procedures for diagnostic purposes (biopsy of lung nodule) and central access such as port-a-cath placement are allowed. * Patients with a history of serious or non-healing wound or bone fracture (pathologic fracture of primary tumor is not considered exclusion). * Patients with any medical or surgical conditions that would interfere with gastrointestinal absorption of cabozantinib. * Patients with previously identify allergy or hypersensitivity to components of the study treatment formulations. * Patients who are receiving any other investigational agent not defined within this protocol are not eligible. * Patients who in the opinion of the investigator may not be able to comply with the safety monitoring requirements of the study are not eligible. * Patients who received enzyme-inducing anticonvulsants within 14 days prior to enrollment. * Patients with a prior history of hypertension (\> 95th percentile for age, height, and sex for patients \< 18 years and \> 140/90 mmHg for patients \>= 18 years requiring medication for blood pressure control. * Patients who are receiving drugs that prolong QTc. * Patients receiving anticoagulation with oral coumarin agents (eg warfarin), direct thrombin inhibitors (eg dabigatran), direct factor Xa inhibitor betrixaban, or platelet inhibitors (eg, clopidogrel). Low dose aspirin for cardioprotection (per local applicable guidelines) and low dose, low molecular weight heparins (LMWH) are permitted. Anticoagulation with therapeutic doses of LMWH and direct factor Xa inhibitors rivaroxaban or apixaban are allowed in subjects who are on a stable dose for at least 6 weeks before the first dose of study treatment, and who have had no complications from a thromboembolic event or the anticoagulation regimen. * Patients receiving strong CYP3A4 inducers or strong CYP3A4 inhibitors. * Female patients who are pregnant since fetal toxicities and teratogenic effects have been noted for several of the study drugs. A pregnancy test is required for female patients of childbearing potential. * Lactating females who plan to breastfeed their infants. * Sexually active patients of reproductive potential who have not agreed to use an effective contraceptive method for the duration of protocol therapy.

Treatments Being Tested

PROCEDURE

Bone Scan

Undergo bone scintography

DRUG

Cabozantinib S-malate

Given PO

DRUG

Cisplatin

Given IV

PROCEDURE

Computed Tomography

Undergo CT

DRUG

Doxorubicin Hydrochloride

Given IV

PROCEDURE

Magnetic Resonance Imaging

Undergo MRI

DRUG

Methotrexate

Given IV

PROCEDURE

Surgical Procedure

Undergo surgery

PROCEDURE

X-Ray Imaging

Undergo X-ray

Locations (20)

Trial sites listed on ClinicalTrials.gov for this study. Site activation status can vary — confirm with the specific site before traveling for a screening visit.

Children's Hospital of Alabama
Birmingham, Alabama, United States
Banner Children's at Desert
Mesa, Arizona, United States
Phoenix Childrens Hospital
Phoenix, Arizona, United States
Banner University Medical Center - Tucson
Tucson, Arizona, United States
Arkansas Children's Hospital
Little Rock, Arkansas, United States
Kaiser Permanente Downey Medical Center
Downey, California, United States
City of Hope Comprehensive Cancer Center
Duarte, California, United States
Loma Linda University Medical Center
Loma Linda, California, United States
Miller Children's and Women's Hospital Long Beach
Long Beach, California, United States
Children's Hospital Los Angeles
Los Angeles, California, United States
Cedars Sinai Medical Center
Los Angeles, California, United States
Mattel Children's Hospital UCLA
Los Angeles, California, United States
Valley Children's Hospital
Madera, California, United States
UCSF Benioff Children's Hospital Oakland
Oakland, California, United States
Kaiser Permanente-Oakland
Oakland, California, United States
Children's Hospital of Orange County
Orange, California, United States
Lucile Packard Children's Hospital Stanford University
Palo Alto, California, United States
University of California Davis Comprehensive Cancer Center
Sacramento, California, United States
Rady Children's Hospital - San Diego
San Diego, California, United States
UCSF Medical Center-Mission Bay
San Francisco, California, United States

How to Talk to Your Doctor About This Trial

Bring the printable summary of this trial — including the NCT ID (NCT05691478), the sponsor (National Cancer Institute (NCI)), and the key eligibility criteria — to your next appointment. Your doctor can review the inclusion and exclusion criteria against your medical history, lab values, and current treatments to assess whether you are likely to qualify. They can also help you weigh whether trial participation makes sense alongside your existing care plan.

Useful questions to walk through together: What does the trial protocol require beyond standard care? How long is the active treatment phase, and how long is follow-up? Are there study visits at sites I can reach? Who pays for the trial-specific procedures, and who pays for standard-of-care portions? See our 25 questions to ask about clinical trials guide for a more complete checklist.

Authoritative Sources

The official record for this trial lives on ClinicalTrials.gov — the federal registry maintained by the National Library of Medicine at NIH. For background on how this trial fits into the FDA approval pathway, see the FDA drug approval process. For oncology-specific guidance for patients considering trials, the National Cancer Institute publishes patient-oriented overviews. International trial registries are aggregated by the WHO ICTRP.

Frequently Asked Questions

What is the NCT05691478 clinical trial studying?

This phase II/III trial tests the safety, side effects, and best dose of the drug cabozantinib in combination with standard chemotherapy, and to compare the effect of adding cabozantinib to standard chemotherapy alone in treating patients with newly diagnosed osteosarcoma. Cabozantinib is in a class of medications called kinase inhibitors which block protein signals affecting new blood vessel formation and the ability to activate growth signaling pathways. This may help slow the growth of tumor cells. The drugs used in standard chemotherapy for this trial are methotrexate, doxorubicin, and cis… The full protocol is registered on ClinicalTrials.gov and includes the primary outcome measures, eligibility criteria, and study endpoints.

Who can participate in NCT05691478?

Eligibility for this trial depends on the specific inclusion and exclusion criteria set by the sponsor. The plain-English summary above translates the most important criteria into accessible language; the official clinical text is preserved in the collapsible section underneath. Whether you fit any specific trial is a medical decision your doctor needs to confirm — bring the trial information to your treating physician for a full review against your medical history.

How do I contact the trial site for NCT05691478?

Contact information registered with ClinicalTrials.gov is shown in the sidebar of this page. Before reaching out, confirm with your treating physician that this trial is appropriate for your situation. The trial site will then walk you through the screening process to determine final eligibility.

Is participating in a clinical trial safe?

Clinical trials in the United States are regulated by the FDA and overseen by Institutional Review Boards (IRBs) that review the protocol for safety. Risk varies by trial — Phase 1 studies test new treatments in humans for the first time, while Phase 3 trials use treatments that have already passed earlier safety screening. The informed consent document for any specific trial details the known risks and what to expect. Discuss those risks with your physician before deciding whether to participate.

Where can I verify the data on this page?

Every detail on this page comes directly from the ClinicalTrials.gov API. Click "View on ClinicalTrials.gov" in the sidebar to see the official, unmodified record. The federal record is always authoritative; this page is a structured presentation with a plain-English eligibility translation. For background on how clinical trials are regulated, see the FDA drug approval process documentation.

How This Page Is Built

Every field on this page is pulled directly from the ClinicalTrials.gov API v2 — no estimates, no proxies. The plain-English eligibility translation is generated from the original protocol text and reviewed for fidelity to the underlying clinical criteria. The original clinical text remains visible in the collapsible section above so users and clinicians can verify the translation. Read the full methodology for the data pipeline and known limitations.

Source: ClinicalTrials.gov API v2 record for NCT05691478. Maintained by the National Library of Medicine at NIH. Public domain. Cite as: "TrialFinderData. NCT05691478. Data: ClinicalTrials.gov."

Medical disclaimer: This page is informational, not medical advice. Talk to your doctor about whether a clinical trial is right for you.

Last updated 2026-05-08 · Data from ClinicalTrials.gov.