What are the treatments for neurofibromatosis type 1?

Question

Hello doctor,

My 11-year-old son was diagnosed with neurofibromatosis type 1 as an infant after developing multiple café-au-lait spots and later axillary freckling. Recently, we have noticed alarming progression with new cutaneous neurofibromas appearing within the past 3 months, plus a rapidly growing plexiform neurofibroma on the neck that is visibly increased in size and now causes pain with head movement. Most concerning are new neurological symptoms - severe headaches occurring 4-5 times weekly, often with early morning vomiting, progressive vision changes with difficulty reading the classroom board, and declining academic performance with new learning difficulties. Emergency MRI revealed multiple T2 hyperintensities consistent with neurofibromatosis type 1 spots, plus a concerning finding of a 3.2 cm mass involving the optic chiasm with features concerning for optic pathway glioma, and moderate hydrocephalus requiring urgent neurosurgical evaluation. Ophthalmology assessment showed decreased visual acuity (20/70 right eye, 20/100 left eye), not present at examination 6 months ago.

He has also developed scoliosis, measuring 37 degrees, requiring bracing. Genetic testing confirmed an NF1 gene mutation described as "likely pathogenic null variant." We are completely overwhelmed with rapid symptom progression and conflicting recommendations from various specialists. What is the standard treatment approach for NF1-associated optic pathway gliomas? How urgent is intervention for moderate hydrocephalus without obvious symptoms? Should we be consulting proton beam therapy centers given the tumor location? Is the rapid appearance of new neurofibromas during puberty typical or concerning for a more aggressive disease variant?

Kindly help.

Answer 1

Hello,

Welcome to icliniq.com.

I read your query and can understand your concern.

I sincerely empathize with you and your son during this challenging time.

Optic pathway gliomas (tumors near the eyes): These tumors can lead to vision issues. If they are rapidly growing or impacting vision, chemotherapy (such as Vincristine) is commonly employed to reduce their size. Proton beam therapy is an excellent choice for tumors located near delicate areas like the optic nerves due to its precision. Surgery is generally avoided unless the tumor is easily accessible, as it can be complicated when involving the optic nerves.
Hydrocephalus (fluid in the brain): Hydrocephalus can lead to headaches and other serious complications if left untreated. Even in the absence of significant symptoms, prompt treatment is crucial to prevent long-term brain damage. A neurosurgeon will assess whether your son requires surgery or a shunt to alleviate the excess fluid.
Rapidly growing neurofibromas: It is typical for neurofibromas (skin tumors) to increase in size during puberty; however, if they grow rapidly or cause discomfort (such as the one on your son’s neck), they require careful observation. Occasionally, these tumors may exhibit more aggressive growth, so it is essential to monitor them closely and consult the doctor if there are any concerning changes.
Scoliosis (curved spine): Scoliosis (curved spine) is frequently observed in NF1 (neurofibromatosis type 1). A brace is often utilized to prevent further progression. Regular evaluations of your son are necessary to determine if the curvature is worsening.

Next steps that you have to take;

Hydrocephalus: Consult a neurosurgeon regarding the fluid accumulation in the brain. Timely intervention is vital, even in the absence of symptoms.
Tumor treatment: Discuss options for chemotherapy or proton beam therapy for the optic pathway glioma with a physician.
Skin tumors: Continue monitoring the growing tumors, particularly the painful ones, and ensure regular check-ups.
Scoliosis: Maintain the use of the brace and schedule follow-ups with healthcare providers to track the curvature.

I hope this information helps you.

Feel free to ask further queries.

Thank you.