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Breakthrough Treatments for Neurofibromatosis and Schwannomatosis

Thanks to groundbreaking research funded by our generous donors, there are now FDA-approved treatment options for neurofibromatosis and schwannomatosis — with even more promising therapies on the horizon. Explore how innovation is transforming care for those living with NF and schwannomatosis.

Child joyfully jumping, raising arms, wearing a "Halter" shirt on a blue background. Text: "IT'S A GO! FDA approves drug for children and adults with NF," with Children's Tumor Foundation logo.

Gomekli (mirdametinib)

On Tuesday, February 11, 2025, SpringWorks Therapeutics, a commercial-stage biopharmaceutical company focused on severe rare diseases and cancer, announced the U.S. Food and Drug Administration (FDA) approval of GOMEKLI™ (mirdametinib), SpringWorks’ MEK inhibitor, for the treatment of adult and pediatric patients 2 years of age and older with neurofibromatosis type 1 (NF1) who have inoperable plexiform neurofibromas (PN).

This marks the second FDA approval for the treatment of patients with neurofibromatosis and schwannomatosis, genetic conditions that cause tumors to grow on nerves throughout the body.

“We are excited to celebrate the extraordinary milestone of our partners and long-term friends at SpringWorks for the NF1-PN community. This FDA approval shows the power of collaboration to advance innovative science for drugs that may otherwise not have been taken forward,” said Annette Bakker, PhD, Chief Executive Officer of the Children’s Tumor Foundation. “When industry, researchers, and organizations like ours driving treatment innovation join forces, scientific progress moves faster, and patients gain access to the therapies they need. Every treatment approval is hard-won, built on research, persistence, and partnership. Today, that work delivers a critical new option for NF patients of all ages.”

Read our announcement here. 

Read the press release here. 

Read the FDA’s announcement here.

Celebrate With Us

Koselugo (selumetinib)

The U.S. Food and Drug Administration (FDA) approved Koselugo (selumetinib) for use in patients with inoperable plexiform neurofibromas, a common manifestation in NF1. The FDA’s approval in 2020 was a major milestone for patients living with neurofibromatosis or schwannomatosis. Affecting 1 in 2,000 people of all populations equally, this announcement was the first-ever approved treatment for NF and portends the potential for the development of treatment options for all NF patients.

Koselugo’s approval followed comprehensive clinical testing of the drug in patients at the National Cancer Institute (NCI), a division of the National Institutes of Health (NIH). In those clinical trials, over 70% of NF patients with inoperable plexiform neurofibromas saw tumor size reduction anywhere from 20-60% in size. In addition to both visible and actual tumor reduction, patients reported higher-quality physical function, reduced pain, improved mobility, and enhanced emotional and psychological status.

View FAQ: FDA Approval of Selumetinib

Our MEK Story

Philip experienced a 60% tumor shrinkage thanks to an FDA-approved MEK-inhibitor drug.

The groundbreaking use of MEK inhibitors as a treatment for NF tumors began with early-stage discoveries funded by the Children’s Tumor Foundation (CTF). CTF-supported researchers were the first to demonstrate that MEK inhibitors could significantly reduce NF tumor size—paving the way for a revolutionary shift in NF treatment.

Through proactive and strategic collaboration, CTF played a crucial role in accelerating this “MEK Story,” working alongside the NCI, NIH, NFRPCDMRP (Neurofibromatosis Research Program of the Congressionally Directed Medical Research Programs), and NTAP (Neurofibromatosis Therapeutic Acceleration Program) to ensure swift progress. This coordinated effort maximized donor and investor funding, secured federal support, and brought treatments to patients faster.

A defining moment in this journey was the first-ever NF listening session at the FDA, where patients played a direct role in shaping the path to approval—reinforcing CTF’s commitment to putting patients at the center of research and innovation.

MEK Inhibitor Success Stories

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Watch this video about Jane

Jane

“I am thankful for the Children’s Tumor Foundation’s enormous efforts to support the research that led to such a trial. Now that selumetinib has been approved as the first-ever FDA-approved treatment, I am thrilled, that now other people with plexiform neurofibromas will have access to and can benefit from selumetinib; proud that Jane was one of the first 24 children in the world to take selumetinib.  She has seen it through from a Phase I trial to FDA approval, and her experiences, both good and bad, with the medication have helped guide researchers on how best to use it; and relieved that all of Jane’s hard work—all the trips to NIH, all the blood draws and MRIs and other tests, all the side effects and uncertainty—has paid off and will benefit others.”

-as told by her mom Kristy

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young boy smiling

Philip

“People don’t ask me what is wrong with my neck anymore. The drug does make me fatigued which is tough since most kids my age are active in sports or physical activities that are challenging for me. But I’ve found activities that I enjoy, and friends that enjoy being a part of my life. I enjoy reading, gaming, boy scouts, coding, and more. I’m getting ready to start high school and I’m thankful for all the donors that funded the doctors and researchers who made selumetinib possible. Now that it is FDA approved, I am thankful that others may experience what I have experienced.”

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young boy smiling

Cooper

“We are so thankful that the Children’s Tumor Foundation invested in the science that made the clinical trial for selumetinib possible! Cooper began the MEK inhibitor in November 2018, when he was 7 years old and has been taking it for a year and five months. We are incredibly thankful that all NF Heroes will now have access to the drug that changed Cooper’s life. We shudder to think of what would have happened if Cooper’s tumor had continued to grow. Before starting the drug, his tumor was nearly doubling in volume every 18 months. Since starting selumetinib, his tumor has not only stopped growing, it has shrunk 21%! Our hope is that it will be as life-changing for others as it has been for our family.”

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About MEK Inhibitors

MEK inhibitors are a class (or group) of medications that have most often been used in melanoma (skin cancer) and other types of tumors. In the studies completed so far, MEK inhibitors have been shown to shrink tumors in the majority of people who take them. Why MEK Inhibitors in NF1? MEK is one of the components of the signaling pathway that is overactive in people born with NF1. It is the loss of NF1 and the activity of this pathway that is associated with tumor growth. The goal of MEK inhibitors is to block MEK signaling and, therefore, block the pathway. Learn more in this Patient Info Sheet. 

Brigitte Widemann, MD, was the principal investigator of the selumetinib clinical trial at the National Institutes of Health. Dr. Widemann was interviewed by one of her patients, Aidan, who lives with NF1 and was on the selumetinib clinical trial for many years. Watch that video here. 

The Children’s Tumor Foundation Clinical Care Advisory Board (CCAB) published a research article in The Oncologist medical journal with guidelines for physicians on prescribing MEK inhibitors and managing their toxicities. That article is freely available to read HERE.

NF Treatments on the Horizon

CTF leads the fight to end NF by investing in the most promising research and driving it to completion. We unite the field and strengthen NF care to deliver lifesaving treatments and solutions for children and adults. Everything we do is to bring treatments to NF patients. Read more about promising treatments that are on the horizon below.

Our Impact

Topical Treatment for cutaneous neurofibromas: NFX-179

CTF’s early impact investment could soon lead to a gel for cutaneous neurofibroma (cNF) skin tumors. Read more at the link below, and watch our NF Summit educational session on treatments for cNF.

Read about NFX-179Watch cNF Session
Logo of nflection therapeutics in blue color palette.

Breakthrough for NF2-SWN: Brigatinib

CTF’s team uncovered and fast-tracked Brigatinib as a potential treatment in the first NF platform clinical trial, which is showing great promise. Read more below, or watch this webinar about treatments in progress for NF2-SWN.

Read MoreWebinar
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Promising AI-Driven NF Drug: HLX-1502

CTF’s investment accelerates the development of Healx’s drug, which has been granted Fast Track designation by the FDA.

Learn More

Your Support at Work

Thanks to the support of our donors, we are in a new era of approved drugs for NF.  

YOU made this happen for the entire NF community. We are at this game-changing moment because of supporters like you, who stood with the Children’s Tumor Foundation and funded the pioneering research that led to the FDA approval of two MEK-inhibitor drugs, and now, more drugs in the pipeline. Thank you.

But our work is not done. Now, more than ever, we need your help to drive more ground-breaking research, invest in more clinical trials, and fuel vital partnerships with pharma and biotech to get patients the treatments they need. Your support means hope to each and every one of our patients and their families. We are not done, and we will not stop until we end NF.

Ways to Give

"[Children's Tumor Foundation] advocated for drugs like mirdametinib that had been stopped in development at other pharmaceutical companies because they saw the promise that it held for patients with NF1-PN based on the available Phase 2 data."

Saqib IslamSpringWorks Therapeutics CEO

“This announcement from the FDA about Koselugo (selumetinib) is a tremendous step towards our ultimate dream – approved treatments for all forms of neurofibromatosis. We believe that FDA approval of this treatment helps not only a subset of NF1 patients, it opens the door to increased interest in all forms of NF by pharmaceutical companies. We are already experiencing it – the number of companies interested in NF1, NF2-SWN, and schwannomatosis is growing rapidly.”

Annette Bakker, PhDChildren’s Tumor Foundation Chief Executive Officer

"CTF has funded groundbreaking preclinical work and early clinical studies that have moved forward into treatment trials, and
ultimately led to the first FDA-approved drug for NF1."

Nicole Ullrich, MD, PhD, Boston Children’s Hospital/Harvard Medical School