On April 10, 2020, the Food and Drug Administration approved selumetinib (KOSELUGO, AstraZeneca) for pediatric patients, 2 years of age and older, with neurofibromatosis type 1 (NF1) who have symptomatic, inoperable plexiform neurofibromas (PN). Selumetinib, a kinase inhibitor, is the first therapy approved for pediatric patients who have this...