Neurofibromatosis type 1 with plexiform neurofibromas (NF1-PN) is a rare genetic disorder that affects approximately 30,000 to 50,000 people in the United States. Doug spoke with Dr. Angela Hirbe, Associate Professor of Medicine and Director of the Adult Neurofibromatosis Clinical Program, Washington University School of Medicine in St. Louis, and a patient of hers, Austin, who was diagnosed as a child. GOMEKLI.com