A Study With Tovorafenib (DAY101) as a Treatment Option for Progressive, Relapsed, or Refractory Langerhans Cell Histiocytosis

June 11, 2026 updated by: National Cancer Institute (NCI)

Phase 2 Study of Tovorafenib (DAY101) in Relapsed and Refractory Langerhans Cell Histiocytosis

This phase II trial tests the safety, side effects, best dose and activity of tovorafenib (DAY101) in treating patients with Langerhans cell histiocytosis that is growing, spreading, or getting worse (progressive), has come back (relapsed) after previous treatment, or does not respond to therapy (refractory). Langerhans cell histiocytosis is a type of disease that occurs when the body makes too many immature Langerhans cells (a type of white blood cell). When these cells build up, they can form tumors in certain tissues and organs including bones, skin, lungs and pituitary gland and can damage them. This tumor is more common in children and young adults. DAY101 may stop the growth of cancer cells by blocking some of the enzymes needed for cell growth. Using DAY101 may be effective in treating patients with relapsed or refractory Langerhans cell histiocytosis.

Study Overview

Status

Recruiting

Conditions

Intervention / Treatment

Detailed Description

PRIMARY OBJECTIVE:

I. To determine overall response rate (ORR) for children and young adults with relapsed or refractory BRAFV600E positive (cohort 1) and BRAFV600E negative (cohort 2) Langerhans cell histiocytosis (LCH) treated with tovorafenib (DAY101) after 2 cycles and must be maintained 4 weeks later.

SECONDARY OBJECTIVES:

I. To determine nature and severity of adverse events in patients treated with tovorafenib (DAY101) for relapsed or refractory LCH.

II. To describe event-free survival (EFS) at 1 year in children and young adults with relapsed and refractory LCH treated with tovorafenib (DAY 101) for up to 1 year.

III. To determine durability of response in children and young adults with relapsed or refractory LCH treated with tovorafenib (DAY101) following cessation of therapy in patients with complete response (CR) at 1 year.

IV. To describe progression-free (and relapse-free) survival (PFS) and overall survival (OS) in children and young adults with relapsed or refractory LCH treated with tovorafenib (DAY101) for up to 1 year.

EXPLORATORY OBJECTIVES:

I. To determine potential role of pathogenic tumor mutation in response to tovorafenib (DAY101), and to evaluate changes in bone marrow and peripheral blood cell populations carrying pathogenic mutations in response to tovorafenib (DAY101) therapy.

Ia. To define somatic mutations in LCH lesion biopsies; Ib. To determine impact of tovorafenib (DAY101) on bone marrow and blood BRAFV600E+ mononuclear cells; Ic. To determine impact of tovorafenib (DAY101) on cerebral spinal fluid and disease response; Id. To determine the performance of standardized immunohistochemical analysis of LCH lesion biopsies.

II. To compare performance of LCH-specific response criteria to Response Evaluation Criteria in Solid Tumors (RECIST) criteria.

III. To describe the pharmacokinetics of tovorafenib (DAY101) when administered to pediatric and young adult patients with relapse or refractory LCH.

OUTLINE: This is a dose escalation study of tovorafenib followed by a phase II trial.

Patients receive tovorafenib orally (PO) once weekly (QW) on days 1, 8, 15, and 22 of each cycle. Cycles repeat every 28 days for 12 cycles in the absence of disease progression or unacceptable toxicity. Patients also undergo multi-gated acquisition (MUGA) or echocardiography (ECHO) scans, and fludeoxyglucose F-18 (FDG)-positron emission tomography (PET) or computed tomography (CT) throughout the trial, and collection of blood and urine samples on study. Patients with suspicion of bone marrow and/or central nervous system involvement will also undergo bone marrow biopsy and aspiration and lumbar puncture on study and during follow up.

After completion of study treatment, patients are followed up at 28 days, months 3, 6, 9, and 12, and then at 2 years post cycle 12.

Study Type

Interventional

Enrollment (Estimated)

48

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

  • Australia
    • New South Wales
      • Randwick, New South Wales, Australia, 2031
        • Recruiting
        • Sydney Children's Hospital
        • Principal Investigator:
          • Draga Barbaric
        • Contact:
          • Site Public Contact
          • Phone Number: (02) 9382-1721
    • Queensland
      • South Brisbane, Queensland, Australia, 4101
        • Recruiting
        • Queensland Children's Hospital
        • Principal Investigator:
          • Steven A. Foresto
        • Contact:
          • Site Public Contact
          • Phone Number: 61 7 3068 1111
    • Victoria
      • Parkville, Victoria, Australia, 3052
        • Recruiting
        • Royal Children's Hospital
        • Principal Investigator:
          • Martin A. Campbell
        • Contact:
    • Western Australia
      • Perth, Western Australia, Australia, 6009
  • Canada
      • Québec, Canada, G1V 4G2
        • Recruiting
        • CHU de Quebec-Centre Hospitalier de l'Universite Laval (CHUL)
        • Principal Investigator:
          • Bruno Michon
        • Contact:
    • Alberta
      • Edmonton, Alberta, Canada, T6G 2B7
        • Recruiting
        • University of Alberta Hospital
        • Contact:
        • Principal Investigator:
          • Sarah J. McKillop
    • British Columbia
      • Vancouver, British Columbia, Canada, V6H 3V4
        • Recruiting
        • British Columbia Children's Hospital
        • Contact:
          • Site Public Contact
          • Phone Number: 6477 604-875-2345
        • Principal Investigator:
          • Rebecca J. Deyell
    • Nova Scotia
      • Halifax, Nova Scotia, Canada, B3K 6R8
        • Recruiting
        • IWK Health Centre
        • Contact:
        • Principal Investigator:
          • Chelsea Ash
    • Ontario
      • Hamilton, Ontario, Canada, L8N 3Z5
        • Recruiting
        • McMaster Children's Hospital at Hamilton Health Sciences
        • Contact:
          • Site Public Contact
          • Phone Number: 905-521-2100
        • Principal Investigator:
          • Uma H. Athale
      • London, Ontario, Canada, N6A 5W9
        • Recruiting
        • Children's Hospital
        • Contact:
          • Site Public Contact
          • Phone Number: 519-685-8306
        • Principal Investigator:
          • Shayna M. Zelcer
      • Toronto, Ontario, Canada, M5G 1X8
        • Recruiting
        • Hospital for Sick Children
        • Contact:
        • Principal Investigator:
          • Oussama A. Abla
    • Quebec
      • Montreal, Quebec, Canada, H3T 1C5
        • Recruiting
        • Centre Hospitalier Universitaire Sainte-Justine
        • Principal Investigator:
          • Monia Marzouki
        • Contact:
      • Sherbrooke, Quebec, Canada, J1H 5N4
        • Recruiting
        • Centre Hospitalier Universitaire de Sherbrooke-Fleurimont
        • Contact:
        • Principal Investigator:
          • Josee Brossard
  • United States
    • Alabama
      • Birmingham, Alabama, United States, 35233
        • Recruiting
        • Children's Hospital of Alabama
        • Contact:
        • Principal Investigator:
          • Matthew A. Kutny
    • Arkansas
      • Little Rock, Arkansas, United States, 72202-3591
        • Recruiting
        • Arkansas Children's Hospital
        • Principal Investigator:
          • Michael W. Bishop
        • Contact:
          • Site Public Contact
          • Phone Number: 501-364-7373
    • California
      • Downey, California, United States, 90242
        • Recruiting
        • Kaiser Permanente Downey Medical Center
        • Contact:
          • Site Public Contact
          • Phone Number: 626-564-3455
        • Principal Investigator:
          • Robert M. Cooper
      • Loma Linda, California, United States, 92354
        • Recruiting
        • Loma Linda University Medical Center
        • Contact:
          • Site Public Contact
          • Phone Number: 909-558-4050
        • Principal Investigator:
          • Albert Kheradpour
      • Los Angeles, California, United States, 90027
        • Recruiting
        • Children's Hospital Los Angeles
        • Contact:
          • Site Public Contact
          • Phone Number: 323-361-4110
        • Principal Investigator:
          • Rebecca S. Parker
      • Madera, California, United States, 93636
        • Active, not recruiting
        • Valley Children's Hospital
      • Oakland, California, United States, 94611
        • Recruiting
        • Kaiser Permanente-Oakland
        • Contact:
          • Site Public Contact
          • Phone Number: 877-642-4691
          • Email: Kpoct@kp.org
        • Principal Investigator:
          • Aarati V. Rao
      • Oakland, California, United States, 94609
        • Recruiting
        • UCSF Benioff Children's Hospital Oakland
        • Principal Investigator:
          • Jennifer G. Michlitsch
        • Contact:
      • Orange, California, United States, 92868
        • Recruiting
        • Children's Hospital of Orange County
        • Contact:
        • Principal Investigator:
          • Elyssa M. Rubin
      • Palo Alto, California, United States, 94304
        • Recruiting
        • Lucile Packard Children's Hospital Stanford University
        • Contact:
        • Principal Investigator:
          • Jay Michael S. Balagtas
      • San Francisco, California, United States, 94158
        • Recruiting
        • UCSF Medical Center-Mission Bay
        • Contact:
        • Principal Investigator:
          • Natalie L. Wu
    • Colorado
      • Aurora, Colorado, United States, 80045
        • Recruiting
        • Children's Hospital Colorado
        • Contact:
        • Principal Investigator:
          • Timothy P. Garrington
      • Denver, Colorado, United States, 80218
        • Recruiting
        • Rocky Mountain Hospital for Children-Presbyterian Saint Luke's Medical Center
        • Contact:
        • Principal Investigator:
          • Florence Choo
    • Connecticut
      • Hartford, Connecticut, United States, 06106
        • Recruiting
        • Connecticut Children's Medical Center
        • Contact:
          • Site Public Contact
          • Phone Number: 860-545-9981
        • Principal Investigator:
          • Michael S. Isakoff
      • New Haven, Connecticut, United States, 06520
        • Recruiting
        • Yale University
        • Contact:
        • Principal Investigator:
          • Farzana Pashankar
    • Delaware
      • Wilmington, Delaware, United States, 19803
        • Recruiting
        • Alfred I duPont Hospital for Children
        • Contact:
        • Principal Investigator:
          • Vibhuti Agarwal
    • District of Columbia
      • Washington D.C., District of Columbia, United States, 20010
        • Recruiting
        • Children's National Medical Center
        • Principal Investigator:
          • Jeffrey S. Dome
        • Contact:
    • Florida
      • Fort Myers, Florida, United States, 33908
        • Recruiting
        • Golisano Children's Hospital of Southwest Florida
        • Contact:
        • Principal Investigator:
          • Emad K. Salman
      • Gainesville, Florida, United States, 32610
        • Recruiting
        • UF Health Cancer Institute - Gainesville
        • Contact:
        • Principal Investigator:
          • Brian Stover
      • Hollywood, Florida, United States, 33021
        • Recruiting
        • Memorial Regional Hospital/Joe DiMaggio Children's Hospital
        • Contact:
          • Site Public Contact
          • Phone Number: 954-265-1847
          • Email: OHR@mhs.net
        • Principal Investigator:
          • Iftikhar Hanif
      • Jacksonville, Florida, United States, 32207
        • Recruiting
        • Nemours Children's Clinic-Jacksonville
        • Contact:
        • Principal Investigator:
          • Vibhuti Agarwal
      • Miami, Florida, United States, 33155
        • Recruiting
        • Nicklaus Children's Hospital
        • Contact:
          • Site Public Contact
          • Phone Number: 888-624-2778
        • Principal Investigator:
          • Maggie E. Fader
      • Miami, Florida, United States, 33136
        • Recruiting
        • University of Miami Miller School of Medicine-Sylvester Cancer Center
        • Contact:
          • Site Public Contact
          • Phone Number: 305-243-2647
        • Principal Investigator:
          • Warren Alperstein
      • Orlando, Florida, United States, 32806
        • Recruiting
        • Arnold Palmer Hospital for Children
        • Principal Investigator:
          • Jaime M. Libes-Bander
        • Contact:
      • Orlando, Florida, United States, 32827
        • Recruiting
        • Nemours Children's Hospital
        • Contact:
        • Principal Investigator:
          • Vibhuti Agarwal
      • Pensacola, Florida, United States, 32504
      • St. Petersburg, Florida, United States, 33701
        • Recruiting
        • Johns Hopkins All Children's Hospital
        • Contact:
        • Principal Investigator:
          • Jennifer B. Dean
      • Tampa, Florida, United States, 33607
        • Recruiting
        • Saint Joseph's Hospital/Children's Hospital-Tampa
        • Contact:
        • Principal Investigator:
          • Don E. Eslin
    • Georgia
      • Atlanta, Georgia, United States, 30329
        • Recruiting
        • Children's Healthcare of Atlanta - Arthur M Blank Hospital
        • Principal Investigator:
          • Kathryn S. Sutton
        • Contact:
      • Savannah, Georgia, United States, 31404
        • Recruiting
        • Memorial Health University Medical Center
        • Contact:
        • Principal Investigator:
          • Andrew L. Pendleton
    • Hawaii
      • Honolulu, Hawaii, United States, 96826
        • Recruiting
        • Kapiolani Medical Center for Women and Children
        • Contact:
          • Site Public Contact
          • Phone Number: 808-983-6090
        • Principal Investigator:
          • Wade T. Kyono
    • Illinois
      • Chicago, Illinois, United States, 60611
        • Recruiting
        • Lurie Children's Hospital-Chicago
        • Contact:
          • Site Public Contact
          • Phone Number: 773-880-4562
        • Principal Investigator:
          • Joanna L. Weinstein
      • Chicago, Illinois, United States, 60637
        • Recruiting
        • University of Chicago Comprehensive Cancer Center
        • Contact:
        • Principal Investigator:
          • Perry C. Morocco
      • Peoria, Illinois, United States, 61637
    • Indiana
      • Indianapolis, Indiana, United States, 46202
        • Recruiting
        • Riley Hospital for Children
        • Contact:
          • Site Public Contact
          • Phone Number: 800-248-1199
        • Principal Investigator:
          • Jennifer A. Belsky
    • Iowa
      • Des Moines, Iowa, United States, 50309
        • Recruiting
        • Blank Children's Hospital
        • Contact:
        • Principal Investigator:
          • Samantha L. Mallory
      • Iowa City, Iowa, United States, 52242
        • Recruiting
        • University of Iowa/Holden Comprehensive Cancer Center
        • Contact:
          • Site Public Contact
          • Phone Number: 800-237-1225
        • Principal Investigator:
          • Andrew P. Groves
    • Kentucky
      • Lexington, Kentucky, United States, 40536
        • Recruiting
        • University of Kentucky/Markey Cancer Center
        • Contact:
          • Site Public Contact
          • Phone Number: 859-257-3379
        • Principal Investigator:
          • James T. Badgett
    • Louisiana
      • New Orleans, Louisiana, United States, 70118
        • Recruiting
        • Children's Hospital New Orleans
        • Principal Investigator:
          • Maria C. Velez-Yanguas
        • Contact:
          • Site Public Contact
          • Phone Number: 504-894-5377
      • New Orleans, Louisiana, United States, 70121
        • Recruiting
        • Ochsner Medical Center Jefferson
        • Contact:
        • Principal Investigator:
          • Craig Lotterman
    • Maryland
      • Baltimore, Maryland, United States, 21215
        • Recruiting
        • Sinai Hospital of Baltimore
        • Principal Investigator:
          • Jason M. Fixler
        • Contact:
          • Site Public Contact
          • Phone Number: 410-601-9083
    • Michigan
      • East Lansing, Michigan, United States, 48823
        • Suspended
        • Michigan State University
      • Grand Rapids, Michigan, United States, 49503
        • Recruiting
        • Corewell Health Grand Rapids Hospitals - Helen DeVos Children's Hospital
        • Contact:
        • Principal Investigator:
          • Kathleen Y. Butler
      • Kalamazoo, Michigan, United States, 49007
        • Recruiting
        • Bronson Methodist Hospital
        • Contact:
        • Principal Investigator:
          • Kathleen Y. Butler
    • Minnesota
      • Minneapolis, Minnesota, United States, 55404
        • Recruiting
        • Children's Hospitals and Clinics of Minnesota - Minneapolis
        • Principal Investigator:
          • Michael K. Richards
        • Contact:
      • Minneapolis, Minnesota, United States, 55455
        • Active, not recruiting
        • University of Minnesota/Masonic Cancer Center
    • Mississippi
      • Jackson, Mississippi, United States, 39216
        • Recruiting
        • University of Mississippi Medical Center
        • Contact:
          • Site Public Contact
          • Phone Number: 601-815-6700
        • Principal Investigator:
          • Amanda Strobel
    • Missouri
      • St Louis, Missouri, United States, 63110
        • Recruiting
        • Washington University School of Medicine
        • Contact:
        • Principal Investigator:
          • Bryan A. Sisk
      • St Louis, Missouri, United States, 63141
        • Recruiting
        • Mercy Hospital Saint Louis
        • Contact:
          • Site Public Contact
          • Phone Number: 314-251-7066
        • Principal Investigator:
          • Robin D. Hanson
      • St Louis, Missouri, United States, 63104
        • Recruiting
        • Cardinal Glennon Children's Medical Center
        • Contact:
          • Site Public Contact
          • Phone Number: 314-268-4000
        • Principal Investigator:
          • William S. Ferguson
    • Nebraska
      • Omaha, Nebraska, United States, 68114
        • Recruiting
        • Children's Hospital and Medical Center of Omaha
        • Contact:
          • Site Public Contact
          • Phone Number: 402-955-3949
        • Principal Investigator:
          • Jill C. Beck
      • Omaha, Nebraska, United States, 68198
        • Recruiting
        • University of Nebraska Medical Center
        • Contact:
        • Principal Investigator:
          • Jill C. Beck
    • Nevada
      • Las Vegas, Nevada, United States, 89135
        • Recruiting
        • Alliance for Childhood Diseases/Cure 4 the Kids Foundation
        • Contact:
        • Principal Investigator:
          • Alan K. Ikeda
      • Las Vegas, Nevada, United States, 89144
        • Recruiting
        • Summerlin Hospital Medical Center
        • Contact:
        • Principal Investigator:
          • Alan K. Ikeda
    • New Jersey
      • Hackensack, New Jersey, United States, 07601
        • Recruiting
        • Hackensack University Medical Center
        • Principal Investigator:
          • Katharine Offer
        • Contact:
          • Site Public Contact
          • Phone Number: 551-996-2897
      • New Brunswick, New Jersey, United States, 08903
        • Recruiting
        • Rutgers Cancer Institute of New Jersey-Robert Wood Johnson University Hospital
        • Principal Investigator:
          • Marissa Botwinick
        • Contact:
          • Site Public Contact
          • Phone Number: 732-235-8675
      • Paterson, New Jersey, United States, 07503
        • Recruiting
        • Saint Joseph's Regional Medical Center
        • Contact:
        • Principal Investigator:
          • Alissa Kahn
    • New York
      • Albany, New York, United States, 12208
        • Recruiting
        • Albany Medical Center
        • Contact:
          • Site Public Contact
          • Phone Number: 518-262-5513
        • Principal Investigator:
          • Lauren R. Weintraub
      • Brooklyn, New York, United States, 11219
        • Recruiting
        • Maimonides Medical Center
        • Contact:
          • Site Public Contact
          • Phone Number: 718-765-2500
        • Principal Investigator:
          • Mahmut Y. Celiker
      • New Hyde Park, New York, United States, 11040
        • Recruiting
        • The Steven and Alexandra Cohen Children's Medical Center of New York
        • Contact:
          • Site Public Contact
          • Phone Number: 718-470-3460
        • Principal Investigator:
          • Julie I. Krystal
      • New York, New York, United States, 10032
        • Recruiting
        • NYP/Columbia University Medical Center/Herbert Irving Comprehensive Cancer Center
        • Principal Investigator:
          • Nobuko Hijiya
        • Contact:
      • New York, New York, United States, 10065
        • Recruiting
        • Memorial Sloan Kettering Cancer Center
        • Contact:
          • Site Public Contact
          • Phone Number: 212-639-7592
        • Principal Investigator:
          • Christopher J. Forlenza
      • New York, New York, United States, 10016
        • Recruiting
        • Laura and Isaac Perlmutter Cancer Center at NYU Langone
        • Principal Investigator:
          • Elizabeth A. Raetz
        • Contact:
      • New York, New York, United States, 10029
        • Recruiting
        • Mount Sinai Hospital
        • Contact:
          • Site Public Contact
          • Phone Number: 212-824-7309
          • Email: CCTO@mssm.edu
        • Principal Investigator:
          • Pamela R. Merola
      • New York, New York, United States, 10065
        • Recruiting
        • NYP/Weill Cornell Medical Center
        • Contact:
          • Site Public Contact
          • Phone Number: 212-746-1848
        • Principal Investigator:
          • Nitya Gulati
      • Syracuse, New York, United States, 13210
        • Recruiting
        • State University of New York Upstate Medical University
        • Contact:
          • Site Public Contact
          • Phone Number: 315-464-5476
        • Principal Investigator:
          • Melanie A. Comito
      • The Bronx, New York, United States, 10467
        • Recruiting
        • Montefiore Medical Center - Moses Campus
        • Contact:
        • Principal Investigator:
          • Alice Lee
      • Valhalla, New York, United States, 10595
        • Recruiting
        • New York Medical College
        • Contact:
          • Site Public Contact
          • Phone Number: 914-594-3794
        • Principal Investigator:
          • Jessica C. Hochberg
    • North Carolina
      • Asheville, North Carolina, United States, 28801
      • Durham, North Carolina, United States, 27710
        • Recruiting
        • Duke University Medical Center
        • Principal Investigator:
          • Jessica M. Sun
        • Contact:
          • Site Public Contact
          • Phone Number: 888-275-3853
      • Greenville, North Carolina, United States, 27834
        • Recruiting
        • East Carolina University
        • Contact:
        • Principal Investigator:
          • Andrea R. Whitfield
      • Winston-Salem, North Carolina, United States, 27157
        • Recruiting
        • Wake Forest University Health Sciences
        • Contact:
          • Site Public Contact
          • Phone Number: 336-713-6771
        • Principal Investigator:
          • Sarah Supples
    • Ohio
      • Cleveland, Ohio, United States, 44106
        • Recruiting
        • Rainbow Babies and Childrens Hospital
        • Contact:
          • Site Public Contact
          • Phone Number: 216-844-5437
        • Principal Investigator:
          • Duncan S. Stearns
      • Columbus, Ohio, United States, 43205
      • Dayton, Ohio, United States, 45404
        • Recruiting
        • Dayton Children's Hospital
        • Contact:
          • Site Public Contact
          • Phone Number: 800-228-4055
        • Principal Investigator:
          • Jordan M. Wright
    • Oklahoma
      • Oklahoma City, Oklahoma, United States, 73104
        • Recruiting
        • University of Oklahoma Health Sciences Center
        • Contact:
        • Principal Investigator:
          • Rene Y. McNall-Knapp
    • Oregon
      • Portland, Oregon, United States, 97239
        • Recruiting
        • Oregon Health and Science University
        • Contact:
        • Principal Investigator:
          • Katrina Winsnes
    • Pennsylvania
      • Danville, Pennsylvania, United States, 17822
        • Recruiting
        • Geisinger Medical Center
        • Contact:
        • Principal Investigator:
          • Jagadeesh Ramdas
      • Philadelphia, Pennsylvania, United States, 19104
        • Recruiting
        • Children's Hospital of Philadelphia
        • Principal Investigator:
          • Michael D. Hogarty
        • Contact:
      • Philadelphia, Pennsylvania, United States, 19134
        • Recruiting
        • Saint Christopher's Hospital for Children
        • Contact:
          • Site Public Contact
          • Phone Number: 215-427-8991
        • Principal Investigator:
          • Gregory E. Halligan
      • Pittsburgh, Pennsylvania, United States, 15224
        • Recruiting
        • Children's Hospital of Pittsburgh of UPMC
        • Contact:
        • Principal Investigator:
          • Julia E. Segal
    • South Carolina
      • Columbia, South Carolina, United States, 29203
        • Recruiting
        • Prisma Health Richland Hospital
        • Principal Investigator:
          • Stuart L. Cramer
        • Contact:
      • Greenville, South Carolina, United States, 29605
        • Recruiting
        • BI-LO Charities Children's Cancer Center
        • Principal Investigator:
          • Aniket Saha
        • Contact:
    • South Dakota
      • Sioux Falls, South Dakota, United States, 57117-5134
    • Tennessee
      • Knoxville, Tennessee, United States, 37916
        • Recruiting
        • East Tennessee Childrens Hospital
        • Contact:
          • Site Public Contact
          • Phone Number: 865-541-8266
        • Principal Investigator:
          • Susan E. Spiller
      • Nashville, Tennessee, United States, 37232
        • Recruiting
        • Vanderbilt University/Ingram Cancer Center
        • Contact:
          • Site Public Contact
          • Phone Number: 800-811-8480
        • Principal Investigator:
          • Devang J. Pastakia
      • Nashville, Tennessee, United States, 37203
        • Recruiting
        • The Children's Hospital at TriStar Centennial
        • Contact:
          • Site Public Contact
          • Phone Number: 615-342-1919
        • Principal Investigator:
          • Clinton M. Carroll
    • Texas
      • Austin, Texas, United States, 78723
        • Recruiting
        • Dell Children's Medical Center of Central Texas
        • Contact:
        • Principal Investigator:
          • Shannon M. Cohn
      • Dallas, Texas, United States, 75390
        • Recruiting
        • UT Southwestern/Simmons Cancer Center-Dallas
        • Contact:
        • Principal Investigator:
          • Erin B. Butler
      • El Paso, Texas, United States, 79905
        • Recruiting
        • El Paso Children's Hospital
        • Contact:
        • Principal Investigator:
          • Benjamin Carcamo
      • Houston, Texas, United States, 77030
        • Recruiting
        • M D Anderson Cancer Center
        • Contact:
        • Principal Investigator:
          • Najat C. Daw
      • Houston, Texas, United States, 77030
        • Recruiting
        • Baylor College of Medicine/Dan L Duncan Comprehensive Cancer Center
        • Contact:
          • Site Public Contact
          • Phone Number: 713-798-1354
          • Email: burton@bcm.edu
        • Principal Investigator:
          • Olive S. Eckstein
      • San Antonio, Texas, United States, 78207
        • Recruiting
        • Children's Hospital of San Antonio
        • Contact:
        • Principal Investigator:
          • Julie Voeller
      • San Antonio, Texas, United States, 78229
        • Recruiting
        • University of Texas Health Science Center at San Antonio
        • Contact:
        • Principal Investigator:
          • Allison C. Grimes
      • San Antonio, Texas, United States, 78229
        • Recruiting
        • Methodist Children's Hospital of South Texas
        • Contact:
        • Principal Investigator:
          • Jose M. Esquilin
      • Temple, Texas, United States, 76508
        • Recruiting
        • Scott and White Memorial Hospital
        • Contact:
          • Site Public Contact
          • Phone Number: 254-724-5407
        • Principal Investigator:
          • Nicholas W. McGregor
    • Utah
      • Salt Lake City, Utah, United States, 84113
        • Recruiting
        • Primary Children's Hospital
        • Contact:
          • Site Public Contact
          • Phone Number: 801-585-5270
        • Principal Investigator:
          • Taumoha Ghosh
    • Virginia
      • Charlottesville, Virginia, United States, 22908
      • Norfolk, Virginia, United States, 23507
        • Recruiting
        • Children's Hospital of The King's Daughters
        • Contact:
        • Principal Investigator:
          • Melissa S. Mark
      • Richmond, Virginia, United States, 23298
        • Recruiting
        • VCU Massey Comprehensive Cancer Center
        • Principal Investigator:
          • Nadirah El-Amin
        • Contact:
    • Washington
      • Seattle, Washington, United States, 98105
        • Recruiting
        • Seattle Children's Hospital
        • Contact:
          • Site Public Contact
          • Phone Number: 866-987-2000
        • Principal Investigator:
          • Sarah E. Leary
      • Spokane, Washington, United States, 99204
        • Recruiting
        • Providence Sacred Heart Medical Center and Children's Hospital
        • Contact:
        • Principal Investigator:
          • Judy L. Felgenhauer
    • West Virginia
      • Charleston, West Virginia, United States, 25304
        • Recruiting
        • West Virginia University Charleston Division
        • Contact:
          • Site Public Contact
          • Phone Number: 304-388-9944
        • Principal Investigator:
          • Mohamad H. Badawi
    • Wisconsin
      • Milwaukee, Wisconsin, United States, 53226
        • Recruiting
        • Children's Hospital of Wisconsin
        • Principal Investigator:
          • Peter H. Shaw
        • Contact:

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

  • Child
  • Adult

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • 180 days- < 22 years (at time of study enrollment)
  • Patient must have a body surface area of ≥ 0.3 m^2

  • Patients with progressive, relapsed, or recurrent LCH with measurable disease at study entry

    • Patients must have had histologic verification of LCH (from either original diagnosis or relapse/progression) at the time of study entry

      • Tissue confirmation of relapse is recommended but not required.
      • Pathology report must be submitted for central confirmation of diagnosis within 7 days of enrollment.
      • Formalin-fixed paraffin-embedded (FFPE) blocks or unstained slides (initial diagnosis and/or subsequent biopsies) will be required for retrospective central confirmation of diagnosis and molecular studies
      • Patients with mixed histiocytic disorders (e.g. LCH with juvenile xanthogranuloma) may be included
    • Patients must have measurable disease
    • Patients must have progressive or refractory disease or experience relapse after at least one previous systemic treatment strategy
    • Pathogenic somatic mutation detected in genes encoding tyrosine kinase receptors (CSFR1, ERBB3 or ALK), RAS or RAF (may be from original or subsequent biopsy or peripheral blood/bone marrow aspirate). Clinical mutation reports may include quantitative polymerase chain reaction (PCR) (e.g. BRAFV600E) and/or Sanger or next generation sequencing. Immunohistochemistry (e.g. VE1 antibody for BRAFV600E) alone is not sufficient
  • Participant must be able to take an enteral dose and formulation of medication. Study medication is only available as an oral suspension or tablet, which may be taken by mouth or other enteral route such as nasogastric, jejunostomy, or gastric tube
  • Karnofsky >= 50% for patients > 16 years of age and Lansky >= 50% for patients =< 16 years of age
  • Patients must have a performance status corresponding to Eastern Cooperative Oncology Group (ECOG) scores of 0, 1 or 2. Use Karnofsky for patients > 16 years of age and Lansky for patients =< 16 years of age
  • Myelosuppressive chemotherapy: Patients must not have received within 14 days of entry onto this study
  • Investigational agent or any other anticancer therapy not defined above: Patients must not have received any investigational agent or any other anticancer therapy (including MAPK pathway inhibitor) for at least 14 days prior to planned start of tovorafenib (DAY101)
  • Radiation therapy (RT): Patient must not have received RT within 2 weeks after the last dose fraction of RT
  • Patients must have fully recovered from any prior surgery
  • Patients must have fully recovered from the acute toxic effects of all prior chemotherapy, immunotherapy, targeted inhibitor, and/or radiotherapy with toxicities reduced to grade 1 or less (Common Terminology Criteria for Adverse Events [CTCAE] version 5.0)
  • Steroids: =< 0.5 mg/kg/day of prednisone equivalent (maximum 20 mg/day) averaged during the month prior to study enrollment is permissible
  • Strong inducers or inhibitors of CYP2C8 are prohibited for 14 days before the first dose of tovorafenib (DAY101) and from planned administration for the duration of study participation
  • Medications that are breast cancer resistant protein (BCRP) substrates that have a narrow therapeutic index are prohibited for 14 days before the first dose of tovorafenib (DAY101) and for the duration of study participation
  • Peripheral absolute neutrophil count (ANC) >= 750/uL unless secondary to bone marrow involvement, in such cases bone marrow involvement must be documented (must be performed within 7 days prior to enrollment, must be repeated prior to the start of protocol therapy if > 7 days have elapsed from their most recent prior assessment)
  • Platelet count >= 75,000/uL (unsupported/without transfusion within the past 7 days) (must be performed within 7 days prior to enrollment, must be repeated prior to the start of protocol therapy if > 7 days have elapsed from their most recent prior assessment)
  • Patients with marrow disease must have platelet count of >= 75,000/uL (transfusion support allowed) and must not be refractory to platelet transfusions. Bone marrow involvement must be documented
  • Hemoglobin >= 8 g/dL (unsupported/without transfusion within the past 7 days). Patients with marrow disease must have hemoglobin >= 8 g/dL (transfusion support allowed). Bone marrow involvement must be documented
  • Hematopoietic growth factors: At least 14 days after the last dose of a long-acting growth factor (e.g., Neulasta [registered trademark]) or 7 days for short-acting growth factor

  • A serum creatinine based on age/sex as follows (must be performed within 7 days prior to enrollment, must be repeated prior to the start of protocol therapy if > 7 days have elapsed from their most recent prior assessment)

    • Age: 6 months to < 1 year; Maximum Serum Creatinine (mg/dL):= 0.5 mg/dl (male and female)
    • Age: 1 to < 2 years; Maximum Serum Creatinine (mg/dL): = 0.6 mg/dl (male and female)
    • Age: 2 to < 6 years; Maximum Serum Creatinine (mg/dL): = 0.8 mg/dl (male and female)
    • Age: 6 to < 10 years; Maximum Serum Creatinine (mg/dL): = 1.0 mg/dl (male and female)
    • Age: 10 to < 13 years; Maximum Serum Creatinine (mg/dL): = 1.2 mg/dl (male and female)
    • Age: 13 to < 16 years; Maximum Serum Creatinine (mg/dL): = 1.5 mg/dl (male) and 1.4 mg/dl (female)
    • Age: >= 16 years; Maximum Serum Creatinine (mg/dL): = 1.7 mg/dl (male) and 1.4 mg/dl (female)
    • OR- a 24 hour urine creatinine clearance >= 50 mL/min/1.73 m^2
    • OR- a glomerular filtration rate (GFR) >= 50 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
  • Bilirubin (sum of conjugated + unconjugated) =< 1.5 x upper limit of normal (ULN) for age (must be performed within 7 days prior to enrollment, must be repeated prior to the start of protocol therapy if > 7 days have elapsed from their most recent prior assessment)
  • Alanine aminotransferase (ALT) =< 3 x ULN for age (must be performed within 7 days prior to enrollment, must be repeated prior to the start of protocol therapy if > 7 days have elapsed from their most recent prior assessment)
  • Serum albumin >= 2 g/dl must be performed within 7 days prior to enrollment, must be repeated prior to the start of protocol therapy if > 7 days have elapsed from their most recent prior assessment)
  • For patients with liver disease caused by their histiocytic disorder (as evaluated on radiographic imaging or biopsy): patients may be enrolled with abnormal bilirubin, aspartate aminotransferase (AST), ALT and albumin with documentation of histiocytic liver disease
  • Fractional shortening (FS) of >= 25% or ejection fraction of >= 50%, as determined by echocardiography or multigated acquisition scan (MUGA) within 28 days prior to study enrollment. Depending on institutional standard, either FS or left ventricular ejection fraction (LVEF) is adequate for enrollment if only one value is measured; if both values are measured, then both values must meet criteria above (must be obtained within 28 days prior to enrollment and start of protocol therapy) (repeat if necessary)
  • No evidence of dyspnea at rest, no exercise intolerance, and a pulse oximetry > 94% if there is clinical indication for determination; unless it is due to underlying pulmonary LCH

  • Central Nervous System Function Defined As:

    • Patients with seizure disorder may be enrolled if well controlled
    • Central nervous system (CNS) toxicity =< Grade 2
  • Human immunodeficiency virus (HIV) infected patients on effective anti-retroviral therapy with undetectable viral load within 6 months are eligible for this trial unless antiretroviral therapy interacts with the metabolism of tovorafenib (DAY101) and cannot safely be changed to antivirals that do not interact with study medication
  • All patients and/or their parent(s) 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:

  • LCH arising along with other hematologic malignancy (e.g. mixed LCH with acute lymphoblastic leukemia) or any history of non-histiocytic malignancy

  • Disease scenarios as below will be excluded

    • Skin-limited disease
    • Gastrointestinal (GI) tract involvement only (those that have disease that can be determined by endoscopic biopsies only)
    • LCH-associated neurodegeneration (LCH-ND) without parenchymal lesions or other systemic lesions
  • Patients with activating mutations in MAP2K1 are not eligible for this study due to drug target specificity. Mutation status will be submitted to study team within 7 days of enrollment
  • Refractory nausea and vomiting, malabsorption, or external biliary shunt that would preclude adequate absorption of tovorafenib (DAY101)
  • Uncontrolled systemic bacterial, viral, or fungal infection
  • Major surgical procedure or significant traumatic injury within 14 days prior to study enrollment, or anticipation of need for major surgical procedure during the course of the study. Placement of a vascular access device or minor surgery is permitted within fourteen (14) days of study enrollment (provided that the wound has healed)
  • History of significant bowel resection that would preclude adequate absorption or other significant malabsorptive disease
  • Ophthalmologic considerations: Patients with known significant ophthalmologic conditions or known risk factors for retinal vein occlusion (RVO) or central serous retinopathy (CSR) are not eligible
  • History of solid organ or hematopoietic bone marrow transplantation
  • Clinically significant active cardiovascular disease, or history of myocardial infarction, or deep vein thrombosis/pulmonary embolism within 6 months prior to enrollment, ongoing cardiomyopathy, or current prolonged QT interval > 440 ms based on triplicate electrocardiogram (ECG) average
  • History of Grade >= 2 CNS hemorrhage or history of any CNS hemorrhage within 28 days of study entry
  • History of any drug reaction with eosinophilia and systemic symptoms (DRESS) syndrome or Stevens Johnsons syndrome (SJS) or who are allergic to tovorafenib (DAY101) or any of its components
  • CTCAE version (V.) 5.0 Grade 3 symptomatic creatinine kinase (CPK) elevation (> 5 x ULN)
  • Female patients who are pregnant are ineligible. A pregnancy test is required for female patients of childbearing potential
  • Lactating females who plan to breastfeed their infants are ineligible
  • Sexually active patients of reproductive potential who have not agreed to use an effective contraceptive method for the duration of their study participation are ineligible. Women of childbearing potential must use non-hormonal contraception during tovorafenib treatment and for at least 28 days after the last dose. Men should use effective contraception and must not father a child while taking tovorafenib and for 14 days after the last dose

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: Sequential Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Treatment (tovorafenib)
Patients receive tovorafenib PO QW on days 1, 8, 15, and 22 of each cycle. Cycles repeat every 28 days for 12 cycles in the absence of disease progression or unacceptable toxicity. Patients also undergo MUGA or ECHO scans, and FDG-PET or CT throughout the trial, and collection of blood and urine samples on study. Patients with suspicion of bone marrow and/or central nervous system involvement will also undergo bone marrow biopsy and aspiration and lumbar puncture on study and during follow up.
Procedure: Lumbar Puncture
Undergo lumbar puncture
Other Names:
  • LP
  • Spinal Tap
Procedure: Computed Tomography
Undergo CT
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
Procedure: Multigated Acquisition Scan
Undergo MUGA
Other Names:
  • Blood Pool Scan
  • Equilibrium Radionuclide Angiography
  • Gated Blood Pool Imaging
  • MUGA
  • Radionuclide Ventriculography
  • RNVG
  • SYMA Scanning
  • Synchronized Multigated Acquisition Scanning
  • MUGA Scan
  • Multi-Gated Acquisition Scan
  • Radionuclide Ventriculogram Scan
  • Gated Heart Pool Scan
  • RNV Scan
Procedure: Bone Marrow Aspiration
Undergo bone marrow aspiration
Procedure: Bone Marrow Biopsy
Undergo bone marrow biopsy
Other Names:
  • Biopsy of Bone Marrow
  • Biopsy, Bone Marrow
Drug: Tovorafenib
Given PO
Other Names:
  • TAK-580
  • MLN2480
  • BIIB-024
  • DAY 101
  • DAY-101
  • DAY101
  • MLN-2480
  • pan-RAF Kinase Inhibitor DAY101
  • TAK580
  • Ojemda
  • BIIB 024
  • BIIB024
  • MLN 2480
  • TAK 580
Procedure: FDG-Positron Emission Tomography and Computed Tomography Scan
Undergo FDG-PET imaging
Other Names:
  • FDG PET/CT
Procedure: Biospecimen Collection
Undergo collection of blood and urine samples
Other Names:
  • Biological Sample Collection
  • Biospecimen Collected
  • Specimen Collection
  • Sample Collection
Procedure: Echocardiography Test
Undergo ECHO
Other Names:
  • Echocardiography
  • EC

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Frequency of dose limiting toxicity (dose finding phase)
Time Frame: Up to 28 days
Will be analyzed descriptively.
Up to 28 days
Overall response rate (phase II)
Time Frame: After 2 cycles of therapy (each cycle is 28 days)
Will be assessed using minimax Simon's two-stage designs in each of the BRAFV600E and non-BRAFV600E cohorts separately. The two arms will not be directly compared. The 95% confidence interval for the overall response rate will be adjusted for the two-stage design.
After 2 cycles of therapy (each cycle is 28 days)

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Event free survival rate
Time Frame: At 1 and 2 years
Will be estimated by the Kaplan-Meier method beginning at study enrollment. Will be evaluated two years after enrollment of the last patient on the trial and estimates at specific timepoints will be presented along with log-log transformed 95% confidence intervals. Events are defined as relapse/progression, second malignant neoplasm, or death.
At 1 and 2 years
Progression free survival rate
Time Frame: Up to 2 years
Will be estimated by the Kaplan-Meier method beginning at study enrollment. Will be evaluated by two years after enrollment of the last patient on the trial and estimates at specific timepoints will be presented along with log-log transformed 95% confidence intervals.
Up to 2 years
Overall survival rate
Time Frame: Up to 2 years
Will be estimated by the Kaplan-Meier method beginning at study enrollment. Will be evaluated two years after enrollment of the last patient on the trial and estimates at specific timepoints will be presented along with log-log transformed 95% confidence intervals.
Up to 2 years
Duration of response rate
Time Frame: After 12 months of therapy. From the scan confirming the complete response or partial response (whichever is recorded first), until the first occurrence of recurrent or progressive disease or death (event) or last known status on trial
Response is based on modified Response Evaluation Criteria for Solid Tumors (RECIST)/Positron Emission Tomography Response Criteria in Solid Tumors (PERCIST) consistent with other recent pediatric Langerhans Cell Histiocytosis trials (NCT02670707 and NCT04079179) and adult histiocytosis trials with MAPK inhibitors. Comparison of response assessed via RECIST versus (vs.) PERCIST will be analyzed by displaying two-way tables of the responses with no formal statistical testing.
After 12 months of therapy. From the scan confirming the complete response or partial response (whichever is recorded first), until the first occurrence of recurrent or progressive disease or death (event) or last known status on trial

Other Outcome Measures

Outcome Measure
Measure Description
Time Frame
Percent peripheral blood mononuclear cells with mutated allele
Time Frame: Up to 2 years
Will be analyzed descriptively using logistic regression with complete response/progressive response vs. stable disease/progressive disease as the response variable.
Up to 2 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: Carl E Allen, 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)

March 28, 2024

Primary Completion (Estimated)

September 30, 2028

Study Completion (Estimated)

September 30, 2028

Study Registration Dates

First Submitted

April 21, 2023

First Submitted That Met QC Criteria

April 21, 2023

First Posted (Actual)

April 25, 2023

Study Record Updates

Last Update Posted (Actual)

June 12, 2026

Last Update Submitted That Met QC Criteria

June 11, 2026

Last Verified

January 1, 2026

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • NCI-2022-06282 (Registry Identifier: CTRP (Clinical Trial Reporting Program))
  • U10CA180886 (U.S. NIH Grant/Contract)
  • ANHL2121 (Other Identifier: CTEP)

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

YES

IPD Plan Description

NCI is committed to sharing data in accordance with NIH policy. For more details on how clinical trial data is shared, access the link to the NIH data sharing policy page.

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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