This is a phase 1 and 2 study. The phase I is a dose finding portion of the study and phase 2 will enroll additional patients at the dose found in phase I. Patients in phase I and phase 2 will have the same treatment and followup.~Participants will undergo standard of care diagnostic imaging, complete blood count (CBC) with differential and chemistry labs initially. While receiving the GCSF, participants will have a CBC with differential checked a day after each dose and one day prior to first day of radiation. The treatment planning FDG PET/CT will be performed shortly after the GCSF. During chemoradiation, participants will have weekly CBC with differential checked and other labs as standard of care.
This is a research study using Granulocyte Colony Stimulating Factor (GCSF) as a bone marrow stimulating agent for imaging to guide radiation treatment planning. G-CSF is a type of growth factor. Growth factors are proteins made in the body. G-CSF is a type of growth factor that makes the bone marrow produce white blood cells to reduce the risk of infection after some types of cancer treatment.