How long do you have to go to school to be an oncology nurse (including internships)?

You can become an LPN or ADN (Associates degree nurse) in 2 years, or continue on to get a Bachelor's. The BSN is 4 years, and nursing education is shifting to that many facilities and jobs are starting to looking into hiring only BSN RNs (especially in cities), so it depends. You do not have to have special schooling to be in oncology, because any type of nursing you choose will give you an orientation period to the unit where you work one on one with a nurse before you are on your own, so you will get on the job training. You may be asked to attend unit specific training after you have a job on a unit (like becoming certified to administer chemotherapy on an oncology unit), but that would be after you start working, not during school.