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Study identifier: NCT04750928 Synced from ClinicalTrials.gov · July 29, 2026
● Recruiting

Cyclin-Dependent Kinase (CDK)4/6 Inhibitor Abemaciclib for Neurofibromatosis Type I (NF1) Related Atypical Neurofibromas

Condition: Neurofibromatosis 1  ·  Sponsor: National Cancer Institute (NCI)

PhasePhase 1/Phase 2
Planned participants55
Who can joinAll sexes, 12 Years to no upper limit
Healthy volunteersNo

About this study

Background: NF1 is a genetic disease that causes tumors called atypical neurofibromas. These tumors, which arise from nerves, can cause serious medical problems. The only treatment is surgery. Researchers want to see if a drug called abemaciclib can help. Objective: To find a safe, tolerable dose of abemaciclib for treating atypical neurofibromas. Eligibility: People ages 12 and older who have NF1 and have one or more atypical neurofibromas that cannot or will not be removed with surgery Design: Participants will be screened with: Medical history and physical exam Blood, urine, and heart tests MRI: Participants will lie in a machine that takes pictures of the body. A padding or coil will be placed around their head. They may have a contrast agent injected into a vein. Biopsy sample: A small piece of tumor will be removed using a large needle. Participants will have frequent visits during the study. These will include repeats of the screening tests as well as the following: PET scan: Participants will lie in a machine that takes pictures of the body. They will have a contrast agent injected into their arm. Questionnaires about the effects of abemaciclib on pain and quality of life Possible photographs of tumors Participants will take abemaciclib capsules orally twice daily in 28-day cycles. They will take the drug for up to 2 years. Some may be able to take it for longer. Participants will have a follow-up visit about 30 days after their last dose of the study…

This description comes directly from the study's public registry record.

Talk to the study team

Amanda M Carbonell  ·  (240) 760-6006  ·  amanda.carbonell@nih.gov

Brigitte C Widemann, M.D.  ·  (240) 760-6203  ·  widemanb@mail.nih.gov

Always discuss trial participation with your own doctor first.

Locations (1)

National Institutes of Health Clinical CenterBethesda, Maryland, United StatesRecruiting

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Source record: clinicaltrials.gov/study/NCT04750928