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Definition of G-CSF
Medically reviewed by Min Clinic Staff | Updated: January 2026
G-CSF: Granulocyte colony-stimulating factor. A colony-stimulating factor that stimulates the production of neutrophils (a type of white blood cell). G-CSF is a cytokine that belongs to the family of drugs called hematopoietic (blood-forming) agents. Also called filgrastim.