2014, Number 2
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Rev Med Inst Mex Seguro Soc 2014; 52 (2)
Clinical features of acute leukemia and its relationship to the season of the year
Santoyo-Sánchez A, Ramos-Peñafiel C, Palmeros-Morgado G, Mendoza-García E, Olarte-Carrillo I, Martínez-Tovar A, Collazo-Jaloma J
Language: Spanish
References: 30
Page: 176-181
PDF size: 70.68 Kb.
ABSTRACT
Background: In 2009, 17.9 % of hospital morbidity by malignant tumors
in México corresponded to hematological malignancies, mainly acute
leukemia. Some studies suggest a seasonal pattern, since most of the
cases are registered during summer. Our objective was to estimate the
relationship between the different subtypes of acute leukemia with the
age when the disease arose, and the season of the year.
Methods: Retrospective and observational study, based on records of
a hematology department from January 2006 to April 2012. Only the
patients diagnosed with
de novo acute leukemia, stratifi ed according
to the French-American-British classifi cation, were included. Seasonal
analysis was performed using Edward’s periodic model.
Results: The study included 833 acute leukemia cases: 48 % of women
(400), and 52 % of men (433). Median age was 36.2 ± 19.8 years. Acute
lymphoblastic leukemia predominated over acute myeloblastic leukemia
subtype M4 (
p ‹, 0.05), and we found differences (
p ‹ 0.01) between
lymphoblastic and myeloblastic leukemias: 32.3 and 41.8. Despite the
existence of pronounced peaks in the time series, they did not repeat
periodically.
Conclusions: The most common variety of acute leukemia was lymphoblastic
type L2, followed by myeloblastic type M4. People over 40 years
of age were the most affected. A seasonal pattern of acute leukemias
was not observed.
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