Active, Not Recruiting Whole Body MRI to Identify Atypical Neurofibromas in Patients With NF1 NCT03820778 Conditions Atypical Neurofibroma, Atypical Neurofibromatosis, Congenital, Hereditary, and Neonatal Diseases and Abnormalities, +21 more Locations Children's National Health System — Washington D.C., District of Columbia, United States View Trial Details