Evidence map›Paper›PMID 39652801›Full record

ArticleJournal of clinical oncology : official journal of the American Society of Clinical Oncology2025

Larotrectinib for Newly Diagnosed Infantile Fibrosarcoma and Other Pediatric

Theodore W Laetsch, Stephan Voss, Kathleen Ludwig, David Hall, Donald A Barkauskas, Steven G DuBois, Joan Ronan, Erin R Rudzinski, Amanda Memken, Krystal Robinson and 7 more

Abstract readMulticenter Study
In one paragraph

Article in Journal of clinical oncology : official journal of the American Society of Clinical Oncology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

15 citing papers in PubMed.

  1. Review
  2. Review
  3. Review
  4. Article
  5. Review
  6. Molecular Characterization of a ComplexJCO precision oncology · 2026
    Article
  7. Article
  8. Review
  9. [A case report of retroperitoneal infantile fibrosarcoma withZhongguo dang dai er ke za zhi = Chinese journal of contemporary pediatrics · 2025
    Article
  10. Article
  11. Article
  12. Aiming Targeted Drug Development at Rare Pediatric Malignancies.Journal of clinical oncology : official journal of the American Society of Clinical Oncology · 2025
    Article
  13. Review
  14. Article
  15. Review
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

17 authors.

Theodore W LaetschChildren's Hospital of Philadelphia, University of Pennsylvania, Philadelphia, PA.ORCID 0000-0002-8497-3138
Stephan VossDepartment of Radiology, Dana-Farber Cancer Institute, Boston, MA.ORCID 0000-0002-2092-2219
Kathleen LudwigUniversity of Texas Southwestern, Dallas, TX.
David HallChildren's Oncology Group Statistical Center, Monrovia, CA.ORCID 0000-0003-1257-2316
Donald A BarkauskasDepartment of Population and Public Health Sciences, Keck School of Medicine of the University of Southern California, Los Angeles, CA.ORCID 0000-0002-2339-719X
Steven G DuBoisDana-Farber/Boston Children's Cancer and Blood Disorders Center, Boston, MA.ORCID 0000-0003-0882-738X
Joan RonanDana-Farber/Boston Children's Cancer and Blood Disorders Center, Boston, MA.
Erin R RudzinskiDepartment of Pathology, Indiana University, Indianapolis, IN.
Amanda MemkenDepartment of Pediatric Oncology, All Children's Hospital, St Petersburg, FL.ORCID 0000-0003-0252-3270
Krystal RobinsonDepartment of Pediatrics, UT Health San Antonio, San Antonio, TX.
Joel SorgerDepartment of Orthopedic Surgery, Cincinnati Children's Hospital, Cincinnati, OH.
Joel M ReidMayo Clinic Comprehensive Cancer Center, Rochester, MN.ORCID 0000-0003-2872-3123
Teena BhatlaDepartment of Pediatric Oncology, Robert Wood Johnson Barnabas Health, Newark, NJ.
Brian D CromptonDana-Farber/Boston Children's Cancer and Blood Disorders Center, Boston, MA.ORCID 0000-0001-9404-6621
Alanna J ChurchDepartment of Pathology, Boston Children's Hospital, Boston, MA.ORCID 0000-0002-4835-5770
Elizabeth FoxDepartment of Pediatric Oncology, St Jude Children's Research Hospital, Memphis, TN.ORCID 0000-0002-9998-5326
Brenda J WeigelDepartment of Pediatric Oncology, University of Minnesota, Minneapolis, MN.ORCID 0000-0003-1080-1402

Funding

NCTN BIQSFP ANBL1531 (NRT)U10CA180886 · NCI · PUBLIC HEALTH INSTITUTE · PI Douglas S. Hawkins · 2014 to 2026
$390.6M
COG SDMC - Statistics CoreU10CA180899 · NCI · UNIVERSITY OF SOUTHERN CALIFORNIA · PI TODD A ALONZO · 2014 to 2026
$132.8M
COG U24 Funding 2026-2027U24CA196173 · NCI · RESEARCH INST NATIONWIDE CHILDREN'S HOSP · PI Mignon Lee-Cheun Loh, Nilsa Del Carmen Ramirez Milan · 2015 to 2026
$62.5M
NCI NIH HHS U10 CA180886NCI NIH HHS U10 CA180899NCI NIH HHS U24 CA196173
6 · The paper itself

Abstract

purposeThe TRK inhibitor larotrectinib is US Food and Drug Administration approved for

methodsPatients received larotrectinib twice daily in 28-day cycles for a predefined duration of treatment, ranging from 6 to 26 cycles depending on response to therapy and surgical resectability. The primary end point was the objective response rate (ORR) within six cycles in patients with infantile fibrosarcoma (IFS); patients with other histologic diagnoses were analyzed in a separate cohort. Secondary objectives included event-free survival (EFS) and overall survival (OS).

resultsThirty-three patients were enrolled: 18 with IFS and 15 with other solid tumors. The ORR within six cycles was 94% (17/18; 95% adjusted CI, 72.7 to 98.6) among children with IFS and 60% (9/15; 95% CI, 32.3 to 83.7) among children with other solid tumors. Six percent (2/33; 95% CI, 0.7 to 22.2) patients developed progressive disease while on therapy. Two-year EFS and OS among these groups were 82.2% (95% CI, 54.3 to 93.9) and 93.8% (95% CI, 63.2 to 99.1) for IFS and 80% (95% CI, 50.0 to 93.1) and 93.3% (95% CI, 61.3 to 99.0) for other solid tumors, respectively. Patients undergoing surgical resection of their tumor had prolonged EFS, with only 1 of 16 such patients experiencing disease progression. Four of 33 patients had dose-limiting toxicities.

conclusionLarotrectinib is highly active in patients with newly diagnosed

Indexed as

FibrosarcomaOncogene Proteins, FusionProtein Kinase InhibitorsPyrazolesPyrimidinesReceptor, trkAReceptor, trkBAdolescentChildChild, PreschoolFemaleHumansInfantMaleReceptor, trkClarotrectinibOncogene Proteins, FusionProtein Kinase InhibitorsPyrazolesPyrimidinesReceptor, trkAReceptor, trkBReceptor, trkC

Identifiers

PMID39652801
PMCPMC11954674

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.