Allogeneic bone marrow transplantation in first remission for children with very high-risk acute lymphoblastic leukemia: a retrospective case-control study in the Nordic countries. Nordic Society for Pediatric Hematology and Oncology (NOPHO).
Among children with high-risk (HR) ALL there are subgroups with very-high-risk (VHR) features and poor prognosis despite developments in conventional chemotherapy for childhood ALL. We evaluated the outcome of VHR-ALL in children receiving allogeneic BMT (allo-BMT) in first remission (1CR) in a retrospective case-control study. In the population-based ALL material of the five Nordic countries, 22 children with VHR-ALL have undergone allo-BMT in 1CR between 1981-1991. We compared the outcome in these 22 children with 44 closely matched control patients who received conventional chemotherapy on HR-ALL protocols, as well as with a group of 405 children representing the remaining HR-ALL patients in the Nordic ALL database. The disease-free survival at 10 years was 73% in children receiving allo-BMT in 1CR, 50% in the matched controls (P = 0.02), and 59% in the remaining HR-ALL patients. The good prognosis of the allo-BMT group was due to a low relapse rate of 9%, as opposed to 41% in the group of matched controls. The superiority of allo-BMT as therapy in 1CR was mainly apparent in those with a very high WBC of > or = 100 x 10(9)/I at diagnosis; in the allo-BMT group 9/10 survived, as opposed to 8/20 of the matched controls (P = 0.03). We conclude that allo-BMT in 1CR should be seriously considered for children with a matched sibling donor and a VHR-ALL with WBC of > or = 100 and other established VHR criteria.
Saarinen
U M
UM
Division of Pediatric Hematology-Oncology, Children's Hospital, University of Helsinki, Finland.
Mellander
L
L
Nysom
K
K
Ringden
O
O
Schroeder
H
H
Glomstein
A
A
Gustafsson
G
G
D000293:Adolescent; D016026:Bone Marrow Transplantation; D002648:Child; D002675:Child, Preschool; D016208:Databases, Factual; D005069:Evaluation Studies as Topic; D005260:Female; D005387:Finland / Q000453:epidemiology; D006801:Humans; D007055:Iceland / Q000453:epidemiology; D015994:Incidence; D007223:Infant; D008297:Male; D054198:Precursor Cell Lymphoblastic Leukemia-Lymphoma / Q000401:mortality / Q000628:therapy*; D012008:Recurrence; D012074:Remission Induction; D012189:Retrospective Studies; D012307:Risk Factors; D012537:Scandinavian and Nordic Countries / Q000453:epidemiology; D014184:Transplantation, Homologous; D016896:Treatment Outcome