Peripheral Blood Stem Cell Donation is a medical procedure used to collect stem cells from a donor's blood. This process typically involves a donor receiving a medication called G-CSF for several days to increase the number of stem cells in their bloodstream. After this preparation, blood is drawn from the donor, and a machine separates the stem cells from other blood components, returning the remaining blood to the donor. The collected stem cells can be used to treat various conditions, including certain types of cancer, blood disorders, and immune system diseases. This donation is a vital part of bone marrow transplantation and can significantly improve the health and quality of life for patients in need.