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Condition Guide

New Treatments & Clinical Trials for Neurofibromatosis

Last updated May 2026Data from ClinicalTrials.gov94 active trials
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Neurofibromatosis encompasses several genetic conditions — most commonly NF1 and NF2 — causing benign and sometimes malignant tumors to grow along nerves throughout the body. NF1 causes café-au-lait spots, neurofibromas, learning difficulties, and sometimes aggressive malignant peripheral nerve sheath tumors, while NF2 and the related condition schwannomatosis cause vestibular schwannomas that can cause deafness and neurological deficits.

What's actually going on in research

Selumetinib, a MEK inhibitor, is now approved for pediatric NF1 patients with inoperable plexiform neurofibromas and has significantly reduced tumor size and improved function. Trials are evaluating MEK inhibitors in adults, in malignant peripheral nerve sheath tumors, and in NF2-related schwannomas. Drugs targeting the NF2/merlin pathway including Hippo pathway inhibitors and TORC1/2 inhibitors are also being studied for NF2 and schwannomatosis.

MEK inhibitor expansion

Selumetinib and second-generation MEK inhibitors are being studied in adults with NF1, in malignant peripheral nerve sheath tumors, and in children with NF1-associated low-grade glioma.

NF2 targeted therapy

FAK inhibitors, mTOR inhibitors, and drugs targeting the downstream effects of merlin loss are in trials for NF2-associated vestibular schwannomas and meningiomas, where selumetinib has been less effective.

CRISPR and gene-based approaches

Early preclinical and first-in-human studies are exploring whether restoring NF1 or NF2 gene function through gene-correction or gene replacement strategies can halt tumor formation.

What to know before you search

Eligibility depends on NF type (NF1, NF2, or schwannomatosis), tumor location and size, and prior surgery or systemic treatment.

What types of trials are currently open

  • MEK inhibitor trialsTesting selumetinib and next-generation MEK inhibitors for plexiform neurofibromas and NF1-related tumors.
  • NF2 and schwannomatosis trialsEvaluating targeted drugs for vestibular schwannomas and meningiomas caused by NF2 mutations.
  • Malignant PNST trialsTesting drug combinations and immunotherapy for aggressive malignant peripheral nerve sheath tumors.
  • Low-grade glioma trialsStudying MEK and BRAF inhibitors for NF1-related optic pathway and other brain tumors.
  • Surgical and radiosurgery trialsComparing observation, surgery, and focused radiation for NF2-related vestibular schwannomas.

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