Phase I Study to Assess the Effect of Food on the PK and Gastrointestinal Tolerability of Selumetinib in Adolescent Children With Neurofibromatosis Type 1 Related Plexiform Neurofibromas

The dosing regimen for selumetinib (25 mg/m2 bid) will be based on BSA, during T1 and T2 the dose will be 25mg/m2, consistent with the approved prescribing information in the US. If T3 is required, appropriate dose of selumetinib will be defined by Data Review Committee for T3.