What's the difference between a pediatric oncologist nurse and a pediatric oncologist practitioner?

Years of training. Nurses: RN, BSN, MSN can care for patients under the supervision of a "practitioner" which could be a physician or a nurse practitioner A nurse practitioner has extra years of school and clinical training to become an independent practitioner. PA, a physician's assistant can be an independent practitioner. NPs can run a clinic and see patients. They often work on a team with a doctor.