The treatment of childhood acute lymphoblastic leukemia in Guatemala: Biologic features, treatment hurdles, and results.

Abstract:

BACKGROUND:The National Pediatric Oncology Unit (UNOP) is the only pediatric hemato-oncology center in Guatemala. METHODS:Patients ages 1 to 17 years with acute lymphoblastic leukemia (ALL) were treated according to modified ALL Intercontinental Berlin-Frankfurt-Münster (IC-BFM) 2002 protocol. Risk classification was based on age, white blood cell count, immunophenotype, genetics (when available), and early response to therapy. RESULTS:From July 2007 to June 2014, 787 patients were treated, including 160 who had standard-risk ALL, 450 who had intermediate-risk ALL, and 177 who had high-risk ALL. The induction death rate was 6.6%, and the remission rate was 92.9%. The rates of death and treatment abandonment during first complete remission were 4.8% and 2.5%, respectively. At a median observation time of 3.6 years, and with abandonment considered an event, the 5-year event-free survival and overall survival estimates ( ± standard error) were 56.2% ± 2.1% and 64.1% ± 2.1%, respectively, with a 5-year cumulative incidence of relapse of 28.9% ± 2.0%. Twenty-one of 281 patients (7.5%) investigated were positive for the ets variant 6/runt-related transcription factor 1 (ETV6/RUNX1) fusion. CONCLUSIONS:A well organized center in a low-middle-income country can overcome the disadvantages of malnutrition and reduce abandonment. Outcomes remain suboptimal because of late diagnosis, early death, and a high relapse rate, which may have a partly genetic basis. Earlier diagnosis, better management of complications, and better knowledge of ALL will improve outcomes. Cancer 2017;123:436-448. © 2016 American Cancer Society.

journal_name

Cancer

journal_title

Cancer

authors

Antillón FG,Blanco JG,Valverde PD,Castellanos M,Garrido CP,Girón V,Letona TR,Osorio EJ,Borrayo DA,Mack RA,Melgar MA,Lorenzana R,Ribeiro RC,Metzger M,Conter V,Rossi E,Valsecchi MG

doi

10.1002/cncr.30257

subject

Has Abstract

pub_date

2017-02-01 00:00:00

pages

436-448

issue

3

eissn

0008-543X

issn

1097-0142

journal_volume

123

pub_type

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