Abstract:
BACKGROUND:Neonatal leukemia characterized by early stem cell origin and extramedullary infiltration in the first 4 weeks of life is rare. We analyzed the features and outcome of neonatal leukemia in Japan to establish an appropriate treatment strategy for this rare disorder. PROCEDURE:Patients with infant leukemia registered and treated in the Japan Infant Leukemia Study between 1996 and 2001 were analyzed. RESULTS:Among 162 infant leukemia patients, 11 exhibited neonatal leukemia; frequencies for all infant leukemias were 6.9% (8/116) for acute lymphoblastic leukemia (ALL) and 7.3% (3/41) for acute myeloid leukemia (AML). Positive MLL gene rearrangement was observed in all eight patients with ALL; a single patient with AML displayed germline configuration. Acute monoblastic leukemia was apparent in all three patients with AML (M5a in the FAB classification). Most of the patients demonstrated hepatoplenomegaly and hyperleukocytosis at diagnosis. Cutaneous and central nervous system involvement were detected in half of the patients. Four patients (one with AML, and three with ALL) have survived following stem cell transplantation (SCT); however, growth impairment related to SCT was observed in these patients. CONCLUSIONS:These results suggest an improvement attributable to treatment of neonatal leukemia. International-based collaborative studies are necessary to investigate the biology of this condition and to establish appropriate therapeutic strategies.
journal_name
Pediatr Blood Cancerjournal_title
Pediatric blood & cancerauthors
Ishii E,Oda M,Kinugawa N,Oda T,Takimoto T,Suzuki N,Kosaka Y,Ohara A,Ogawa A,Ishii M,Sakata N,Okamura T,Koike K,Kojima S,Horibe K,Mizutani Sdoi
10.1002/pbc.20599keywords:
subject
Has Abstractpub_date
2006-09-01 00:00:00pages
268-72issue
3eissn
1545-5009issn
1545-5017journal_volume
47pub_type
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journal_title:Pediatric blood & cancer
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