[Early relapse after peripheral blood stem cell transplantation in acute myelogenous leukemia with t(8;21)].
We report a 3-year-old boy with acute myelogenous leukemia, who relapsed very early after peripheral blood stem cell transplantation (PBSCT). He was admitted with a tumor in maxillar sinus and hemorrhagic diathesis and was diagnosed as having acute myelogenous leukemia with t(8;21). He achieved complete remission with etoposide, cytosine arabinoside and mitoxantrone. After 8 courses of consolidation therapy and marrow ablative chemotherapy, he received PBSCT. G-CSF was given from day 0 because of severe infection. WBC and platelete counts rapidly increased, however, from day 20 platelet count spontaneously decreased. Concomitantly bone marrow examination revealed the presence of blastic cells. RT-PCR showed that the presence of AML 1/MTG 8 chimera mRNA in the cryopreserved PBSC samples. In vitro analysis also revealed that leukemic cells had G-CSF receptors and increased 3H-thymidine uptake in the presence of G-CSF. These findings strongly suggest that the reinfusion of leukemic cells in PBSC and the administration of G-CSF after PBSCT might be relevant to early relapse in this patient.
Department of Pediatrics, Fukui Medical School.
Y
Y
Fukumoto
A
A
Tanizawa
M
M
Takeuchi
T
T
Takano
Y
Y
Kikawa
M
M
Sudo
D000971:Antineoplastic Combined Chemotherapy Protocols / Q000627:therapeutic use; D002675:Child, Preschool; D002891:Chromosomes, Human, Pair 21; D002898:Chromosomes, Human, Pair 8; D003131:Combined Modality Therapy; D016179:Granulocyte Colony-Stimulating Factor / Q000009:adverse effects; D018380:Hematopoietic Stem Cell Transplantation / Q000009:adverse effects; D006801:Humans; D015470:Leukemia, Myeloid, Acute / Q000235:genetics* / Q000628:therapy*; D008297:Male; D009364:Neoplasm Recurrence, Local / Q000209:etiology*; D018365:Neoplasm, Residual; D014178:Translocation, Genetic
D016179:Granulocyte Colony-Stimulating Factor