Pain Management in Neurofibromatosis Type 1

Introduction to NF1 Pain

The American College of Medical Genetics and Genomics acknowledges that chronic pain in NF1 adults is common and negatively affects quality of life, with a mean pain severity of 6.6/10 1

NF1-related pain manifests in both nociceptive and neuropathic forms, arising from multiple sources, including plexiform neurofibromas, scoliosis, pseudarthrosis, glomus tumors, and idiopathic pain 1
Glomus tumors are small, painful tumors in fingertips, presenting with localized tenderness, severe paroxysmal pain, and cold sensitivity, more common in women 1
Idiopathic pain frequently occurs without an identifiable anatomic correlate 1

New-onset or increasingly severe pain should be evaluated as a possible symptom of malignant peripheral nerve sheath tumor (MPNST), a serious complication requiring immediate evaluation 1
Not all pain in individuals with NF1 is due to NF1, and common etiologies like lower back pain should not be automatically attributed to the underlying genetic condition 1
Delay in diagnosis of glomus tumors can lead to chronic pain, and adults with NF1 should be specifically queried about chronic fingertip and toe pain during routine assessments 1

Screening with pain-interference scales should be implemented routinely, with referral to pain clinics that employ both pharmacologic and non-pharmacologic approaches 1
The American College of Medical Genetics and Genomics recommends medication, physical therapy, surgery, and alternative modalities like transcutaneous electrical nerve stimulation (TENS) for NF1 pain management 1
Surgery is curative for glomus tumors 1
A distinct, rare adult-onset polyneuropathy occurs in NF1, featuring predominantly sensory signs, and is painless in the majority of patients 1