Journal of Clinical Oncology, Vol 5, 1960-1967, Copyright © 1987 by American Society of Clinical Oncology
The value of intensive combination chemotherapy for juvenile chronic myelogenous leukemia
HS Chan, Z Estrov, SS Weitzman and MH Freedman
Division of Hematology-Oncology, Hospital for Sick Children, Toronto, Ontario, Canada.
Nine children with juvenile chronic myelogenous leukemia (JCML) were
diagnosed in an 8-year period from 1977 to 1984. The clinical courses and
outcomes of five patients who received minimal or no chemotherapy were
compared with that of four patients who were treated with intensive acute
nonlymphoblastic leukemia (ANLL) combination chemotherapy. None of the five
patients in the former group achieved clinical remission and their
survivals were 1, 4, 4, 7, and 29 months, respectively. All four patients
in the latter group achieved clinical remissions that lasted 11, 21, 21,
and 27 + months, respectively. The durations of their survival (21, 26, 30,
and 32 + months) were significantly better than the five patients who
received minimal or no chemotherapy (P less than .05). Despite
hospitalizations for chemotherapy and for treatment of
chemotherapy-associated complications, the clinical status and quality of
life of the children who achieved clinical remission were superior to those
who remained in relapse. Although intensive chemotherapy induced lengthy
remissions, three of the four patients have relapsed. Cytogenetic and cell
culture data indicated that the monocytic-macrophage cells characteristic
of JCML appeared to be suppressed during remission rather than totally
eliminated. We recommend that ANLL-type combination chemotherapy be used as
the initial treatment of JCML because of its promptness in effecting
clinical remissions. Improved maintenance and consolidation protocols have
to be developed to produce durable remissions and cures. Alternatively,
bone marrow transplantation may be a useful option soon after remission is
achieved with chemotherapy.

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