from Section 3 - Evaluation and treatment
Published online by Cambridge University Press: 05 April 2013
Introduction
Blood and bone marrow (BM) transplantation (BMT) or hematopoietic stem cell transplantation (HSCT) are procedures that utilize autologous or allogeneic cells to reconstitute a hematopoietic system, after chemotherapy with or without total body irradiation (TBI) to treat cancer intensively or suppress the recipient immunologically to prevent rejection. When used to treat leukemia, the intent of most transplantation approaches in pediatrics is to decrease relapse by using very high doses of cancer therapy to overcome partially resistant cancer cells. Standard high-dose “preparative” regimens (myeloablative regimens) cause irreversible BM failure unless there is “rescue” by the stem cell infusion. While the intensity of therapy alone is sufficient to cure some resistant malignancies, allogeneic transplantation has been noted to add an immunotherapeutic benefit, termed the graft-versus-leukemia (GVL) effect. Sources of hematopoietic stem cells currently used for HSCT include BM, peripheral blood stem cells (PBSC), and umbilical cord blood (CB).
Because intensive therapy associated with the transplantation process can result in organ damage, susceptibility to life-threatening infection, late effects such as growth delay, and immunologic complications such as graft-versus-host disease (GVHD), it is reserved for cancers not curable with standard chemotherapeutic approaches or where there is a significant survival advantage over less intense therapies. Traditional indications for HSCT in leukemia include first or subsequent relapse and the very highest risk subclassifications of leukemias in first remission. As chemotherapy and transplantation outcomes improve, and as more precise definitions of disease risk are discovered, indications for transplantation change. Therefore, careful dialogue between oncologists and transplant physicians should occur early in the course of therapy for high-risk leukemias to determine when or if a transplantation procedure is indicated.
To save this book to your Kindle, first ensure [email protected] is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about saving to your Kindle.
Note you can select to save to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be saved to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.
Find out more about the Kindle Personal Document Service.
To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Dropbox.
To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Google Drive.