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. 2013 Nov;132(5):e1265-75.
doi: 10.1542/peds.2013-1317. Epub 2013 Oct 28.

Fetal growth and childhood cancer: a population-based study

Tone Bjørge  1 , Henrik Toft Sørensen, Tom Grotmol, Anders Engeland, Olof Stephansson, Mika Gissler, Steinar Tretli, Rebecca Troisi
Affiliations

Fetal growth and childhood cancer: a population-based study

Tone Bjørge et al. Pediatrics. 2013 Nov.

Abstract

Objective: The etiology of childhood cancers is largely unknown. Studies have suggested that birth characteristics may be associated with risk. Our goal was to evaluate the risk of childhood cancers in relation to fetal growth.

Methods: We conducted a case-control study nested within Nordic birth registries. The study included cancer cases diagnosed in Denmark, Finland, Norway, and Sweden among children born from 1967 to 2010 and up to 10 matched controls per case, totaling 17,698 cases and 172,422 controls. Odds ratios (ORs) and 95% confidence intervals (95% CIs) were derived from conditional logistic regression.

Results: Risks of all childhood cancers increased with increasing birth weight (P trend ≤ .001). Risks of acute lymphoid leukemia and Wilms tumor were elevated when birth weight was >4000 g and of central nervous system tumors when birth weight was >4500 g. Newborns large for gestational age were at increased risk of Wilms tumor (OR: 2.1 [95% CI: 1.2-3.6]) and connective/soft tissue tumors (OR: 2.1 [95% CI: 1.1-4.4]). In contrast, the risk of acute myeloid leukemia was increased among children born small for gestational age (OR: 1.8 [95% CI: 1.1-3.1]). Children diagnosed with central nervous system tumors at <1 year of age had elevated risk with increasing head circumference (P trend < .001). Those with head circumference >39 cm had the highest risk (OR: 4.7 [95% CI: 2.5-8.7]).

Conclusions: In this large, Nordic population-based study, increased risks for several childhood tumors were associated with measures of fetal growth, supporting the hypothesis that tumorigenesis manifesting in childhood is initiated in utero.

Keywords: Nordic countries; birth weight; childhood cancer; fetal growth; nested case-control study.

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Figures

FIGURE 1
FIGURE 1
Number of childhood cancer cases according to age and country.
FIGURE 2
FIGURE 2
Number of major childhood cancer cases according to age.
FIGURE 3
FIGURE 3
ORs and 95% CIs of all cancers combined according to birth weight and age, Nordic countries, 1967–2010. ORs were adjusted for gestational age, maternal age, and parity.
FIGURE 4
FIGURE 4
ORs and 95% CIs of ALL according to birth weight and age, Nordic countries, 1967–2010. ORs were adjusted for gestational age, maternal age, and parity.
FIGURE 5
FIGURE 5
ORs and 95% CIs of CNS tumors according to head circumference and age, Nordic countries, 1967–2010. ORs were adjusted for gestational age, birth weight, maternal age, and parity.
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