In the case of childhood leukemia treatment, prior to a transplant the patient first needs to undergo chemotherapy or electrotherapy to kill the cancer cells in the body.
此外，以小兒白血症（血癌）的治療為例，做臍帶血移植前，患者要先做化療、電療，將體內的癌細胞殺死，然後再移植種進幹細胞。