Larotrectinib in Treating Patients With Relapsed or Refractory Advanced Solid Tumors, Non-Hodgkin Lymphoma, or Histiocytic Disorders With NTRK Fusions (A Pediatric MATCH Treatment Trial)

May 12, 2026 updated by: National Cancer Institute (NCI)

NCI-COG Pediatric MATCH (Molecular Analysis for Therapy Choice) - Phase 2 Subprotocol of LOXO-101 (Larotrectinib) in Patients With Tumors Harboring Actionable NTRK Fusions

This phase II Pediatric MATCH trial studies how well larotrectinib works in treating patients with solid tumors, non-Hodgkin lymphoma, or histiocytic disorders with NTRK fusions that may have spread from where it first started to nearby tissue, lymph nodes, or distant parts of the body (advanced) and have come back (relapased) or does not respond to treatment (refractory). Larotrectinib may stop the growth of cancer cells by blocking some of the enzymes needed for cell growth.

Study Overview

Status

Active, not recruiting

Conditions

Intervention / Treatment

Detailed Description

PRIMARY OBJECTIVE:

I. To determine the objective response rate (ORR; complete response + partial response) in pediatric patients treated with larotrectinib sulfate (LOXO-101 [larotrectinib]) with advanced solid tumors (including central nervous system [CNS] tumors), non-Hodgkin lymphomas or histiocytic disorders harboring NTRK 1/2/3 fusions.

SECONDARY OBJECTIVES:

I. To estimate the progression free survival in pediatric patients treated with LOXO-101 (larotrectinib) with advanced solid tumors (including CNS tumors), non-Hodgkin lymphomas or histiocytic disorders with NTRK 1/2/3 fusions.

II. To obtain additional information about the tolerability of LOXO-101 (larotrectinib) in children with relapsed or refractory cancer.

III. To provide preliminary estimates of the pharmacokinetics of LOXO-101 (larotrectinib) in children with relapsed or refractory cancer.

EXPLORATORY OBJECTIVE:

I. To explore approaches to profiling changes in tumor genomics over time through evaluation of circulating tumor deoxyribonucleic acid (DNA).

OUTLINE:

Patients receive larotrectinib sulfate orally (PO) or via nasogastric (NG)- or gastric (G)-tube twice per day (BID) on days 1-28. Cycles repeat every 28 days for up to 2 years in the absence of disease progression or unacceptable toxicity. Patients undergo a computed tomography (CT) scan, magnetic resonance imaging (MRI), an x-ray, bone scan, and/or iobenguane (MIBG) scintigraphy during screening and on study. Patients also undergo bone marrow aspiration and/or biopsy during screening and may undergo blood sample collection on study.

After completion of study treatment, patients are followed up at 30 days, then periodically thereafter.

Study Type

Interventional

Enrollment (Actual)

9

Phase

  • Phase 2

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Puerto Rico
      • San Juan, Puerto Rico, 00926
        • University Pediatric Hospital
      • San Juan, Puerto Rico, 00912
        • San Jorge Children's Hospital
  • United States
    • Alabama
      • Birmingham, Alabama, United States, 35233
        • Children's Hospital of Alabama
    • Alaska
      • Anchorage, Alaska, United States, 99508
        • Providence Alaska Medical Center
    • Arizona
      • Mesa, Arizona, United States, 85202
        • Banner Children's at Desert
      • Tucson, Arizona, United States, 85719
        • Banner University Medical Center - Tucson
    • Arkansas
      • Little Rock, Arkansas, United States, 72202-3591
        • Arkansas Children's Hospital
    • California
      • Downey, California, United States, 90242
        • Kaiser Permanente Downey Medical Center
      • Loma Linda, California, United States, 92354
        • Loma Linda University Medical Center
      • Long Beach, California, United States, 90806
        • Miller Children's and Women's Hospital Long Beach
      • Los Angeles, California, United States, 90027
        • Children's Hospital Los Angeles
      • Madera, California, United States, 93636
        • Valley Children's Hospital
      • Oakland, California, United States, 94609
        • UCSF Benioff Children's Hospital Oakland
      • Oakland, California, United States, 94611
        • Kaiser Permanente-Oakland
      • Sacramento, California, United States, 95817
        • University of California Davis Comprehensive Cancer Center
      • San Francisco, California, United States, 94158
        • UCSF Medical Center-Mission Bay
    • Colorado
      • Aurora, Colorado, United States, 80045
        • Children's Hospital Colorado
      • Denver, Colorado, United States, 80218
        • Rocky Mountain Hospital for Children-Presbyterian Saint Luke's Medical Center
    • Connecticut
      • New Haven, Connecticut, United States, 06520
        • Yale University
    • Delaware
      • Wilmington, Delaware, United States, 19803
        • Alfred I duPont Hospital for Children
    • District of Columbia
      • Washington D.C., District of Columbia, United States, 20010
        • Children's National Medical Center
    • Florida
      • Gainesville, Florida, United States, 32610
        • UF Health Cancer Institute - Gainesville
      • Jacksonville, Florida, United States, 32207
        • Nemours Children's Clinic-Jacksonville
      • Miami, Florida, United States, 33155
        • Nicklaus Children's Hospital
      • Miami, Florida, United States, 33136
        • University of Miami Miller School of Medicine-Sylvester Cancer Center
      • Orlando, Florida, United States, 32827
        • Nemours Children's Hospital
      • Orlando, Florida, United States, 32803
        • AdventHealth Orlando
      • Orlando, Florida, United States, 32806
        • Arnold Palmer Hospital for Children
      • Pensacola, Florida, United States, 32504
        • Nemours Children's Clinic - Pensacola
      • St. Petersburg, Florida, United States, 33701
        • Johns Hopkins All Children's Hospital
      • Tampa, Florida, United States, 33607
        • Saint Joseph's Hospital/Children's Hospital-Tampa
      • West Palm Beach, Florida, United States, 33407
        • Saint Mary's Medical Center
    • Georgia
      • Atlanta, Georgia, United States, 30329
        • Children's Healthcare of Atlanta - Arthur M Blank Hospital
    • Idaho
      • Boise, Idaho, United States, 83712
        • Saint Luke's Cancer Institute - Boise
    • Illinois
      • Chicago, Illinois, United States, 60637
        • University of Chicago Comprehensive Cancer Center
      • Chicago, Illinois, United States, 60611
        • Lurie Children's Hospital-Chicago
      • Peoria, Illinois, United States, 61637
        • Saint Jude Midwest Affiliate
      • Springfield, Illinois, United States, 62702
        • Southern Illinois University School of Medicine
    • Indiana
      • Indianapolis, Indiana, United States, 46202
        • Riley Hospital for Children
      • Indianapolis, Indiana, United States, 46260
        • Ascension Saint Vincent Indianapolis Hospital
    • Iowa
      • Des Moines, Iowa, United States, 50309
        • Blank Children's Hospital
      • Iowa City, Iowa, United States, 52242
        • University of Iowa/Holden Comprehensive Cancer Center
    • Kentucky
      • Louisville, Kentucky, United States, 40202
        • Norton Children's Hospital
    • Louisiana
      • New Orleans, Louisiana, United States, 70121
        • Ochsner Medical Center Jefferson
      • New Orleans, Louisiana, United States, 70118
        • Children's Hospital New Orleans
    • Maine
      • Bangor, Maine, United States, 04401
        • Eastern Maine Medical Center
    • Maryland
      • Baltimore, Maryland, United States, 21287
        • Johns Hopkins University/Sidney Kimmel Cancer Center
      • Baltimore, Maryland, United States, 21215
        • Sinai Hospital of Baltimore
    • Michigan
      • Ann Arbor, Michigan, United States, 48109
        • C S Mott Children's Hospital
      • East Lansing, Michigan, United States, 48823
        • Michigan State University
      • Grand Rapids, Michigan, United States, 49503
        • Corewell Health Grand Rapids Hospitals - Helen DeVos Children's Hospital
      • Kalamazoo, Michigan, United States, 49007
        • Bronson Methodist Hospital
    • Minnesota
      • Minneapolis, Minnesota, United States, 55404
        • Children's Hospitals and Clinics of Minnesota - Minneapolis
      • Minneapolis, Minnesota, United States, 55455
        • University of Minnesota/Masonic Cancer Center
      • Rochester, Minnesota, United States, 55905
        • Mayo Clinic in Rochester
    • Mississippi
      • Jackson, Mississippi, United States, 39216
        • University of Mississippi Medical Center
    • Missouri
      • Kansas City, Missouri, United States, 64108
        • Children's Mercy Hospitals and Clinics
      • St Louis, Missouri, United States, 63110
        • Washington University School of Medicine
      • St Louis, Missouri, United States, 63141
        • Mercy Hospital Saint Louis
      • St Louis, Missouri, United States, 63104
        • Cardinal Glennon Children's Medical Center
    • Nebraska
      • Omaha, Nebraska, United States, 68198
        • University of Nebraska Medical Center
      • Omaha, Nebraska, United States, 68114
        • Children's Hospital and Medical Center of Omaha
    • Nevada
      • Las Vegas, Nevada, United States, 89144
        • Summerlin Hospital Medical Center
      • Las Vegas, Nevada, United States, 89109
        • Sunrise Hospital and Medical Center
      • Las Vegas, Nevada, United States, 89135
        • Alliance for Childhood Diseases/Cure 4 the Kids Foundation
      • Las Vegas, Nevada, United States, 89102
        • University Medical Center of Southern Nevada
    • New Jersey
      • Hackensack, New Jersey, United States, 07601
        • Hackensack University Medical Center
      • Morristown, New Jersey, United States, 07960
        • Morristown Medical Center
      • New Brunswick, New Jersey, United States, 08901
        • Saint Peter's University Hospital
    • New York
      • Albany, New York, United States, 12208
        • Albany Medical Center
      • Buffalo, New York, United States, 14263
        • Roswell Park Cancer Institute
      • New Hyde Park, New York, United States, 11040
        • The Steven and Alexandra Cohen Children's Medical Center of New York
      • New York, New York, United States, 10065
        • Memorial Sloan Kettering Cancer Center
      • New York, New York, United States, 10032
        • NYP/Columbia University Medical Center/Herbert Irving Comprehensive Cancer Center
      • New York, New York, United States, 10065
        • NYP/Weill Cornell Medical Center
      • Rochester, New York, United States, 14642
        • University of Rochester
      • Stony Brook, New York, United States, 11794
        • Stony Brook University Medical Center
      • Syracuse, New York, United States, 13210
        • State University of New York Upstate Medical University
      • The Bronx, New York, United States, 10467
        • Montefiore Medical Center - Moses Campus
      • Valhalla, New York, United States, 10595
        • New York Medical College
    • North Carolina
      • Asheville, North Carolina, United States, 28801
        • Mission Hospital
      • Charlotte, North Carolina, United States, 28203
        • Carolinas Medical Center/Levine Cancer Institute
      • Charlotte, North Carolina, United States, 28204
        • Novant Health Presbyterian Medical Center
      • Durham, North Carolina, United States, 27710
        • Duke University Medical Center
    • North Dakota
      • Fargo, North Dakota, United States, 58122
        • Sanford Broadway Medical Center
    • Ohio
      • Cincinnati, Ohio, United States, 45229
        • Cincinnati Children's Hospital Medical Center
      • Cleveland, Ohio, United States, 44195
        • Cleveland Clinic Foundation
      • Cleveland, Ohio, United States, 44106
        • Rainbow Babies and Childrens Hospital
      • Columbus, Ohio, United States, 43205
        • Nationwide Children's Hospital
      • Dayton, Ohio, United States, 45404
        • Dayton Children's Hospital
      • Toledo, Ohio, United States, 43606
        • ProMedica Toledo Hospital/Russell J Ebeid Children's Hospital
    • Oklahoma
      • Oklahoma City, Oklahoma, United States, 73104
        • University of Oklahoma Health Sciences Center
    • Oregon
      • Portland, Oregon, United States, 97239
        • Oregon Health and Science University
      • Portland, Oregon, United States, 97227
        • Legacy Emanuel Children's Hospital
    • Pennsylvania
      • Danville, Pennsylvania, United States, 17822
        • Geisinger Medical Center
      • Philadelphia, Pennsylvania, United States, 19104
        • Children's Hospital of Philadelphia
      • Pittsburgh, Pennsylvania, United States, 15224
        • Children's Hospital of Pittsburgh of UPMC
    • South Carolina
      • Columbia, South Carolina, United States, 29203
        • Prisma Health Richland Hospital
      • Greenville, South Carolina, United States, 29605
        • BI-LO Charities Children's Cancer Center
    • South Dakota
      • Sioux Falls, South Dakota, United States, 57117-5134
        • Sanford USD Medical Center - Sioux Falls
    • Tennessee
      • Knoxville, Tennessee, United States, 37916
        • East Tennessee Childrens Hospital
      • Memphis, Tennessee, United States, 38105
        • Saint Jude Children's Research Hospital
      • Nashville, Tennessee, United States, 37232
        • Vanderbilt University/Ingram Cancer Center
      • Nashville, Tennessee, United States, 37203
        • The Children's Hospital at TriStar Centennial
    • Texas
      • Austin, Texas, United States, 78723
        • Dell Children's Medical Center of Central Texas
      • Corpus Christi, Texas, United States, 78411
        • Driscoll Children's Hospital
      • Dallas, Texas, United States, 75390
        • UT Southwestern/Simmons Cancer Center-Dallas
      • Dallas, Texas, United States, 75230
        • Medical City Dallas Hospital
      • Fort Worth, Texas, United States, 76104
        • Cook Children's Medical Center
      • Houston, Texas, United States, 77030
        • M D Anderson Cancer Center
      • Houston, Texas, United States, 77030
        • Baylor College of Medicine/Dan L Duncan Comprehensive Cancer Center
      • San Antonio, Texas, United States, 78207
        • Children's Hospital of San Antonio
      • San Antonio, Texas, United States, 78229
        • Methodist Children's Hospital of South Texas
      • Temple, Texas, United States, 76508
        • Scott and White Memorial Hospital
    • Utah
      • Salt Lake City, Utah, United States, 84113
        • Primary Children's Hospital
    • Virginia
      • Norfolk, Virginia, United States, 23507
        • Children's Hospital of The King's Daughters
      • Richmond, Virginia, United States, 23298
        • VCU Massey Comprehensive Cancer Center
    • Washington
      • Seattle, Washington, United States, 98105
        • Seattle Children's Hospital
      • Spokane, Washington, United States, 99204
        • Providence Sacred Heart Medical Center and Children's Hospital
      • Tacoma, Washington, United States, 98431
        • Madigan Army Medical Center
    • West Virginia
      • Morgantown, West Virginia, United States, 26506
        • West Virginia University Healthcare
    • Wisconsin
      • Madison, Wisconsin, United States, 53792
        • University of Wisconsin Carbone Cancer Center - University Hospital
      • Marshfield, Wisconsin, United States, 54449
        • Marshfield Medical Center-Marshfield
      • Milwaukee, Wisconsin, United States, 53226
        • Children's Hospital of Wisconsin

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

1 year to 21 years (Child, Adult)

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • APEC1621SC: Patient must have enrolled onto APEC1621SC and must have been given a treatment assignment to Molecular Analysis for Therapy Choice (MATCH) to APEC1621A based on the presence of an actionable mutation as defined in APEC1621SC
  • Patients must be >= than 12 months and =< 21 years of age at the time of study enrollment

  • Patients must have radiographically measurable disease at the time of study enrollment; patients with neuroblastoma who do not have measurable disease but have MIBG+ evaluable disease are eligible; measurable disease in patients with CNS involvement is defined as any lesion that is at minimum 10 mm in one dimension on standard MRI or CT; Note: The following do not qualify as measurable disease:

    • Malignant fluid collections (e.g., ascites, pleural effusions)
    • Bone marrow infiltration except that detected by MIBG scan for neuroblastoma
    • Lesions only detected by nuclear medicine studies (e.g., bone, gallium or positron emission tomography [PET] scans) except as noted for neuroblastoma
    • Elevated tumor markers in plasma or cerebrospinal fluid (CSF)
    • Previously radiated lesions that have not demonstrated clear progression post radiation
    • Leptomeningeal lesions that do not meet the measurement requirements for Response Evaluation Criteria in Solid Tumors (RECIST) 1.1
  • Karnofsky >= 50% for patients > 16 years of age and Lansky >= 50 for patients =< 16 years of age; Note: neurologic deficits in patients with CNS tumors must have been relatively stable for at least 7 days prior to study enrollment; patients who are unable to walk because of paralysis, but who are up in a wheelchair, will be considered ambulatory for the purpose of assessing the performance score

  • Patients must have fully recovered from the acute toxic effects of all prior anti-cancer therapy and must meet the following minimum duration from prior anti-cancer directed therapy prior to enrollment; if after the required time frame, the numerical eligibility criteria are met, e.g. blood count criteria, the patient is considered to have recovered adequately

    • Cytotoxic chemotherapy or other anti-cancer agents known to be myelosuppressive; for agents not listed, the duration of this interval must be discussed with the study chair and the study-assigned research coordinator prior to enrollment

      • >= 21 days after the last dose of cytotoxic or myelosuppressive chemotherapy (42 days if prior nitrosourea)
    • Anti-cancer agents not known to be myelosuppressive (e.g. not associated with reduced platelet or absolute neutrophil [ANC] counts): >= 7 days after the last dose of agent; for agents not listed, the duration of this interval must be discussed with the study chair and the study-assigned research coordinator prior to enrollment
    • Antibodies: >= 21 days must have elapsed from infusion of last dose of antibody, and toxicity related to prior antibody therapy must be recovered to grade =< 1
    • Corticosteroids: if used to modify immune adverse events related to prior therapy, >= 14 days must have elapsed since last dose of corticosteroid
    • Hematopoietic growth factors: >= 14 days after the last dose of a long-acting growth factor (e.g. pegfilgrastim) or 7 days for short-acting growth factor; for growth factors that have known adverse events occurring beyond 7 days after administration, this period must be extended beyond the time during which adverse events are known to occur; the duration of this interval must be discussed with the study chair and the study-assigned research coordinator
    • Interleukins, interferons and cytokines (other than hematopoietic growth factors): >= 21 days after the completion of interleukins, interferon or cytokines (other than hematopoietic growth factors)

    • Stem cell Infusions (with or without total body irradiation [TBI]):

      • Allogeneic (non-autologous) bone marrow or stem cell transplant, or any stem cell infusion including donor leukocyte infusion (DLI) or boost infusion: >= 84 days after infusion and no evidence of graft versus host disease (GVHD)
      • Autologous stem cell infusion including boost infusion: >= 42 days
    • Cellular therapy: >= 42 days after the completion of any type of cellular therapy (e.g. modified T cells, NK cells, dendritic cells, etc.)
    • Radiation therapy (XRT)/external beam irradiation including protons: >= 14 days after local XRT; >= 150 days after TBI, craniospinal XRT or if radiation to >= 50% of the pelvis; >= 42 days if other substantial brain metastases (BM) radiation; Note: radiation may not be delivered to "measurable disease" tumor site(s) being used to follow response to subprotocol treatment
    • Radiopharmaceutical therapy (e.g., radiolabeled antibody, 131I-MIBG): >= 42 days after systemically administered radiopharmaceutical therapy
    • Patients must not have received prior exposure to other NTRK inhibitors including but not limited to LOXO-101 (larotrectinib), entrectinib (RXDX-101), DS6051, PLX7486

  • For patients with solid tumors without known bone marrow involvement:

    • Peripheral absolute neutrophil count (ANC) >= 1000/mm^3 (within 7 days prior to enrollment)
    • Platelet count >= 100,000/mm^3 (transfusion independent, defined as not receiving platelet transfusions for at least 7 days prior to enrollment) (within 7 days prior to enrollment)
  • Patients with known bone marrow metastatic disease will be eligible for study provided they meet the blood counts (may receive transfusions provided they are not known to be refractory to red cell or platelet transfusions); these patients will not be evaluable for hematologic toxicity
  • Creatinine clearance or radioisotope glomerular filtration rate (GFR) >= 70 ml/min/1.73 m^2 (within 7 days prior to enrollment) or

  • A serum creatinine based on age/gender as follows (within 7 days prior to enrollment):

    • Age: 1 to < 2 years; maximum serum creatinine (mg/dL); male: 0.6 female: 0.6
    • Age: 2 to < 6 years; maximum serum creatinine (mg/dL); male: 0.8 female: 0.8
    • Age: 6 to < 10 years; maximum serum creatinine (mg/dL); male: 1 female: 1
    • Age: 10 to < 13 years; maximum serum creatinine (mg/dL); male: 1.2 female: 1.2
    • Age: 13 to < 16 years; maximum serum creatinine (mg/dL); male: 1.5 female: 1.4
    • Age: >= 16 years; maximum serum creatinine (mg/dL); male: 1.7 female: 1.4
  • Bilirubin (sum of conjugated + unconjugated) =< 1.5 x upper limit of normal (ULN) for age (within 7 days prior to enrollment)
  • Serum glutamate pyruvate transaminase (SGPT) (alanine aminotransferase [ALT]) =< 135 U/L (within 7 days prior to enrollment); (for the purpose of this study, the ULN for SGPT is 45 U/L)
  • Serum albumin >= 2 g/dL (within 7 days prior to enrollment)
  • Patients with seizure disorder may be enrolled if on anti-convulsants and well controlled
  • Nervous system disorders (Common Terminology Criteria for Adverse Events [CTCAE] version [v] 5.0) resulting from prior therapy must be =< grade 2, with the exception of decreased tendon reflect (DTR); any grade of DTR is eligible
  • All patients and/or their parents or legally authorized representatives must sign a written informed consent; assent, when appropriate, will be obtained according to institutional guidelines

Exclusion Criteria:

  • Pregnant or breast-feeding women will not be entered on this study due to risks of fetal and teratogenic adverse events as seen in animal/human studies; pregnancy tests must be obtained in girls who are post-menarchal; males or females of reproductive potential may not participate unless they have agreed to use an effective contraceptive method for the duration of study treatment
  • Patients receiving corticosteroids who have not been on a stable or decreasing dose of corticosteroid for at least 7 days prior to enrollment are not eligible; if used to modify immune adverse events related to prior therapy, >= 14 days must have elapsed since last dose of corticosteroid
  • Patients who are currently receiving another investigational drug are not eligible
  • Patients who are currently receiving other anti-cancer agents are not eligible
  • Patients who are receiving cyclosporine, tacrolimus or other agents to prevent graft-versus-host disease (GVHD) post bone marrow transplant are not eligible for this trial
  • Patients who are currently receiving drugs that are strong inducers or inhibitors of CYP3A4 are not eligible; strong inducers or inhibitors of CYP3A4 should be avoided from 14 days prior to enrollment to the end of the study; Note: CYP3A4 inducing anti-epileptic drugs and dexamethasone for CNS tumors or metastases, on a stable dose, are allowed
  • Patients who have received prior therapy with a specific inhibitor of TRK (including but not limited to entrectinib [RXDX-101], DS-6051b, and PLX7486) are not eligible
  • Patients who have an uncontrolled infection are not eligible
  • Patients who have received a prior solid organ transplantation 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

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: N/A
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Treatment (larotrectinib sulfate)
Patients receive larotrectinib sulfate PO or via NG- or G-tube BID on days 1-28. Cycles repeat every 28 days for up to 2 years in the absence of disease progression or unacceptable toxicity. Patients undergo a CT scan, MRI, an x-ray, bone scan, and/or MIBG scintigraphy during screening and on study. Patients also undergo bone marrow aspiration and/or biopsy during screening and may undergo blood sample collection on study.
Procedure: Magnetic Resonance Imaging
Undergo MRI
Other Names:
  • MRI
  • Magnetic Resonance
  • Magnetic Resonance Imaging Scan
  • Medical Imaging, Magnetic Resonance / Nuclear Magnetic Resonance
  • MR
  • MR Imaging
  • MRI Scan
  • NMR Imaging
  • NMRI
  • Nuclear Magnetic Resonance Imaging
  • Magnetic Resonance Imaging (MRI)
  • sMRI
  • Magnetic resonance imaging (procedure)
  • MRIs
  • Structural MRI
Procedure: Biospecimen Collection
Undergo blood sample collection
Other Names:
  • Biological Sample Collection
  • Biospecimen Collected
  • Specimen Collection
  • Sample Collection
Procedure: Computed Tomography
Undergo a CT scan
Other Names:
  • CT
  • CAT
  • CAT Scan
  • Computed Axial Tomography
  • Computerized Axial Tomography
  • Computerized Tomography
  • CT Scan
  • tomography
  • Computerized axial tomography (procedure)
  • Computerized Tomography (CT) scan
  • Diagnostic CAT Scan
  • Diagnostic CAT Scan Service Type
Drug: Larotrectinib Sulfate
Given PO or via nasogastric- or gastric-tube
Other Names:
  • ARRY 470 Sulfate
  • LOXO 101 Sulfate
  • LOXO-101 Sulfate
  • Vitrakvi
Procedure: Bone Scan
Undergo a bone scan
Other Names:
  • Bone Scintigraphy
Procedure: X-Ray Imaging
Undergo an x-ray
Other Names:
  • Conventional X-Ray
  • Diagnostic Radiology
  • Medical Imaging, X-Ray
  • Radiographic Imaging
  • Radiography
  • RG
  • Static X-Ray
  • X-Ray
  • Plain film radiographs
  • Radiographic imaging procedure (procedure)
Procedure: Bone Marrow Aspiration and Biopsy
Undergo a bone marrow aspiration and/or biopsy
Procedure: Radionuclide Imaging
Undergo a MIBG scintigraphy
Other Names:
  • NM
  • Nuclear Medicine
  • nuclear medicine scan
  • radioimaging
  • Radionuclide Scanning
  • Scan
  • Scintigraphy
  • Gamma Scan

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Objective Response Rate
Time Frame: Up to 2 years from study entry
A responder is defined as a patient who achieves a best response of partial response or complete response on the study. Response rates will be calculated as the percent of evaluable patients who are responders. The revised Response Evaluation Criteria in Solid Tumors (RECIST) guideline (version 1.1) was used to determine response and progression in this study, with specific criteria outlined for the different subtypes of tumors (e.g., 2-dimensional measurements for central nervous system (CNS) tumors).
Up to 2 years from study entry

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Percentage of Patients Experiencing Grade 3 or Higher Adverse Events
Time Frame: Up to 2 years from study entry
Percentage of patients experiencing grade 3 or higher adverse events will be evaluated according to National Cancer Institute Common Terminology Criteria for Adverse Events version 5.0.
Up to 2 years from study entry
Progression Free Survival (PFS)
Time Frame: Up to 6 months from study entry
The Kaplan-Meier method will be used to estimate the 6 month PFS. PFS is defined as time from initiation of protocol treatment to disease progression, recurrence, death from any cause, or date of last contact.
Up to 6 months from study entry

Other Outcome Measures

Outcome Measure
Measure Description
Time Frame
Pharmacokinetics of Larotrectinib
Time Frame: Pre-dose, 1, 2, 4, and 6-8 hours after morning dose of day 1 cycle 1 and pre-dose of day 1 cycle 2
A descriptive analysis of pharmacokinetic parameters of LOXO-101 (larotrectinib) will be performed to define systemic exposure, drug clearance, and other pharmacokinetic parameters. The pharmacokinetic parameters will be summarized with simple summary statistics, including means, medians, ranges, and standard deviations (if numbers and distribution permit). All these analyses will be descriptive and exploratory and hypotheses generating in nature.
Pre-dose, 1, 2, 4, and 6-8 hours after morning dose of day 1 cycle 1 and pre-dose of day 1 cycle 2
Ability to Detect NTRK Fusions in Circulating Cell-free Tumor Deoxyribonucleic Acid in Plasma
Time Frame: Up to 5 years
A descriptive analysis of the exploratory aims will be performed and will be summarized with simple summary statistics. All of these analyses will be descriptive in nature.
Up to 5 years

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

National Cancer Institute (NCI)

Investigators

  • Principal Investigator: Katherine A Janeway, Children's Oncology Group

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

August 23, 2017

Primary Completion (Actual)

September 30, 2024

Study Completion (Estimated)

October 8, 2026

Study Registration Dates

First Submitted

July 10, 2017

First Submitted That Met QC Criteria

July 10, 2017

First Posted (Actual)

July 11, 2017

Study Record Updates

Last Update Posted (Actual)

June 1, 2026

Last Update Submitted That Met QC Criteria

May 12, 2026

Last Verified

May 1, 2026

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • NCI-2017-01264 (Registry Identifier: CTRP (Clinical Trial Reporting Program))
  • U10CA180886 (U.S. NIH Grant/Contract)
  • APEC1621A (Other Identifier: CTEP)

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

Yes

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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