Collegium Ramazzini Statement: Need to Enhance Research and Strengthen Policy for Prevention of Childhood Cancer

Collegium Ramazzini Statement: Need to Enhance Research and Strengthen Policy for Prevention of Childhood Cancer

Authors

  • Ruth A. Etzel, MD, PhD George Washington University https://orcid.org/0000-0002-5236-3976
  • Mark Miller MD, MPH University of California, San Francisco
  • Hannah Thompson, MD, MPH Icahn School of Medicine at Mount Sinai
  • Philip J. Landrigan, MD, MSc Program for Global Health and the Common Good, Boston College
  • Ludwine Casteleyn, MD Collegium Ramazzini
  • Corrado Magnani, MD University of Piemonte Orientale Amedeo Avogadro
  • Tommaso Filippini, MD, DrPH, PhD University of Modena and Reggio Emilia
  • Daniele Mandrioli, MD, PhD Collegium Ramazzini
  • Melissa A. McDiarmid, MD, MPH Occupational and Environmental Medicine, University of Maryland School of Medicine

Keywords:

benzene, folic acid, breastfeeding, pesticides, tobacco, air pollution, radiation, radon, secondhand smoking

Abstract

Incidence rates of many childhood cancers have increased at an average of about 1% per year in the U.S., Europe and Latin America.  A growing literature links increased risk for childhood cancer to a range of exposures during preconception, pregnancy and early childhood. Tobacco, benzene and ionizing radiation are among the prenatal exposures linked to pediatric cancer. Exposures to pesticides and outdoor air pollution have emerged as additional risk factors for pediatric cancer. Breastfeeding and prenatal folic acid use are protective against pediatric cancers.  The risks for pediatric cancer can be reduced by the international community focusing on prevention in public policies and enhancing efforts to reduce exposures to carcinogens during the prenatal period and early childhood.

References

1. Allemani C, Di Carlo V, Ssenyonga N, Baloch FK, Kuehni C, Girardi F, Goić C, Sophiea MK, Šekerija M, Espinoza-Vallejos C, Dadouli K, Sugiyama H, Galceran J, Cañete-Nieto A, Ragusa R, Moreno F, Stiller C, Coleman MP; CONCORD Working Group. Progress towards the WHO Global Initiative for Childhood Cancer target of 60% 5-year survival for all childhood cancers combined, 1990-2019 (CONCORD-4): a Cancer Survival Index derived for 68 countries by analysis of individual records for 613 021 children from 307 population-based cancer registries. Lancet. 2026;407(10536):1335-1359. doi: 10.1016/S0140-6736(26)00189-3.

2. Sultan I, Alfaar AS, Sultan Y, Salman Z, Qaddoumi I. Trends in childhood cancer: Incidence and survival analysis over 45 years of SEER data. PLoS One. 2025;20(1):e0314592. doi: 10.1371/journal.pone.0314592.

3. Steliarova-Foucher E, Fidler MM, Colombet M, Lacour B, Kaatsch P, Piñeros M, Soerjomataram I, Bray F, Coebergh JW, Peris-Bonet R, Stiller CA; ACCIS contributors. Changing geographical patterns and trends in cancer incidence in children and adolescents in Europe, 1991-2010 (Automated Childhood Cancer Information System): a population-based study. Lancet Oncol. 2018;19(9):1159-1169. doi: 10.1016/S1470-2045(18)30423-6.

4. de Paula Silva N, Colombet M, Moreno F, Erdmann F, Dolya A, Piñeros M, Stiller CA, Steliarova-Foucher E; IICC-3 contributors. Incidence of childhood cancer in Latin America and the Caribbean: coverage, patterns, and time trends. Rev Panam Salud Publica. 2024;48:e11. doi: 10.26633/RPSP.2024.11.

5. Schechter CB. Re: Brain and other central nervous system cancers: recent trends in incidence and mortality. J Natl Cancer Inst. 1999;91(23):2050-1. doi: 10.1093/jnci/91.23.2050.

6. Straif K. Environmental carcinogens and childhood cancer. In: Textbook of Children's Environmental Health, 2nd Ed. edited by Ruth A. Etzel and Philip J. Landrigan. New7York: Oxford University Press, 2024.

7. Ricci AM, Emeny RT, Bagley PJ, et al. Causes of Childhood Cancer: A Review of the Recent Literature: Part I-Childhood Factors. Cancers (Basel) 2024;16(7) doi: 10.3390/cancers16071297

8. Benítez L, Castro-Barquero S, Crispi F, Youssef L, Crovetto F, Fischer U, Kameri E, Bueno C, Camos M, Menéndez P, Heinäniemi M, Borkhardt A, Gratacós E. Maternal Lifestyle and Prenatal Risk Factors for Childhood Leukemia: A Review of the Existing Evidence. Fetal Diagn Ther. 2024;51(4):395-410. doi: 10.1159/000539141.

9. The Consortium For Children's Environmental Health, Wirth DA, Cropper M, Axelrad DA, Bald C, Bhatnagar A, Birnbaum LS, Burke TA, Chiles TC, Geiser K, Griffin C, Kumar P, Mandrioli D, Park Y, Raps H, Roger A, Smith TR, States JC, Straif K, Tickner JA, Wagner W, Wang Z, Whitman EM, Woodruff TJ, Yousuf A, Landrigan PJ. Manufactured Chemicals and Children's Health - The Need for New Law. N Engl J Med. 2025;392(3):299-305. doi: 10.1056/NEJMms2409092.

10. Navarrete-Meneses MDP, Salas-Labadia C, Gomez-Chavez F, et al. Environmental Pollution and Risk of Childhood Cancer: A Scoping Review of Evidence from the Last Decade. Int J Mol Sci 2024;25(6) doi: 10.3390/ijms25063284

11. Karalexi MA, Tagkas CF, Markozannes G, et al. Exposure to pesticides and childhood leukemia risk: A systematic review and meta-analysis. Environ Pollut 2021;285:117376. doi: 10.1016/j.envpol.2021.117376

12. Ferreira JD, Couto AC, Pombo-de-Oliveira MS, et al. In utero pesticide exposure and leukemia in Brazilian children < 2 years of age. Environ Health Perspect 2013;121(2):269-75. doi: 10.1289/ehp.1103942

13. Chu A, Heck JE, Ribeiro KB, et al. Wilms' tumour: a systematic review of risk factors and meta-analysis. Paediatr Perinat Epidemiol 2010;24(5):449-69. doi: 10.1111/j.1365-3016.2010.01133.x

14. Rios P, Bauer H, Schleiermacher G, et al. Environmental exposures related to parental habits in the perinatal period and the risk of Wilms' tumor in children. Cancer Epidemiol 2020;66:101706. doi: 10.1016/j.canep.2020.101706

15. Khan A, Feulefack J, Sergi CM. Pre-conceptional and prenatal exposure to pesticides and pediatric neuroblastoma. A meta-analysis of nine studies. Environ Toxicol Pharmacol 2022;90:103790. doi: 10.1016/j.etap.2021.103790

16. Onyije FM, Dolatkhah R, Olsson A, et al. Risk factors for childhood brain tumours: A systematic review and meta-analysis of observational studies from 1976 to 2022. Cancer Epidemiol 2024;88:102510. doi: 10.1016/j.canep.2023.102510

17. Van Maele-Fabry G, Gamet-Payrastre L, Lison D. Residential exposure to pesticides as risk factor for childhood and young adult brain tumors: A systematic review and meta-analysis. Environ Int 2017;106:69-90. doi: 10.1016/j.envint.2017.05.018

18. Carlos-Wallace FM, Zhang L, Smith MT, et al. Parental, In Utero, and Early-Life Exposure to Benzene and the Risk of Childhood Leukemia: A Meta-Analysis. Am J Epidemiol 2016;183(1):1-14. doi: 10.1093/aje/kwv120

19. Peters S, Glass DC, Greenop KR, et al. Childhood brain tumours: associations with parental occupational exposure to solvents. British Journal of Cancer 2014;111(5):998-1003. doi: 10.1038/bjc.2014.358

20. Bailey HD, Metayer C, Milne E, Petridou ET, Infante-Rivard C, Spector LG, Clavel J, Dockerty JD, Zhang L, Armstrong BK, Rudant J, Fritschi L, Amigou A, Hatzipantelis E, Kang AY, Stiakaki E, Schüz J. Home paint exposures and risk of childhood acute lymphoblastic leukemia: findings from the Childhood Leukemia International Consortium. Cancer Causes Control. 2015;26(9):1257-70. doi: 10.1007/s10552-015-0618-0.

21. Secretan B, Straif K, Baan R, Grosse Y, El Ghissassi F, Bouvard V, Benbrahim-Tallaa L, Guha N, Freeman C, Galichet L, Cogliano V; WHO International Agency for Research on Cancer Monograph Working Group. A review of human carcinogens--Part E: tobacco, areca nut, alcohol, coal smoke, and salted fish. Lancet Oncol. 2009;10(11):1033-4. doi: 10.1016/s1470-2045(09)70326-2.

22. McLaughlin CC, Baptiste MS, Schymura MJ, et al. Maternal and infant birth characteristics and hepatoblastoma. Am J Epidemiol 2006;163(9):818-28. doi: 10.1093/aje/kwj104

23. Sorahan T, Lancashire RJ. Parental cigarette smoking and childhood risks of hepatoblastoma: OSCC data. Br J Cancer 2004;90(5):1016-8. doi: 10.1038/sj.bjc.6601651

24. Lee KM, Ward MH, Han S, et al. Paternal smoking, genetic polymorphisms in CYP1A1 and childhood leukemia risk. Leuk Res 2009;33(2):250-8. doi: 10.1016/j.leukres.2008.06.031

25. Metayer C, Petridou E, Arangure JM, et al. Parental Tobacco Smoking and Acute Myeloid Leukemia: The Childhood Leukemia International Consortium. Am J Epidemiol 2016;184(4):261-73. doi: 10.1093/aje/kww018

26. Lee KM, Ward MH, Han S, Ahn HS, Kang HJ, Choi HS, Shin HY, Koo HH, Seo JJ, Choi JE, Ahn YO, Kang D. Paternal smoking, genetic polymorphisms in CYP1A1 and childhood leukemia risk. Leuk Res. 2009 Feb;33(2):250-8. doi: 10.1016/j.leukres.2008.06.031.

27. Antonopoulos CN, Sergentanis TN, Papadopoulou C, Andrie E, Dessypris N, Panagopoulou P, Polychronopoulou S, Pourtsidis A, Athanasiadou-Piperopoulou F, Kalmanti M, Sidi V, Moschovi M, Petridou ET. Maternal smoking during pregnancy and childhood lymphoma: a meta-analysis. Int J Cancer. 2011 Dec 1;129(11):2694-703. doi: 10.1002/ijc.25929.

28. Boothe VL, Boehmer TK, Wendel AM, et al. Residential traffic exposure and childhood leukemia: a systematic review and meta-analysis. Am J Prev Med 2014;46(4):413-22. doi: 10.1016/j.amepre.2013.11.004

29. Filippini T, Hatch EE, Rothman KJ, et al. Association between Outdoor Air Pollution and Childhood Leukemia: A Systematic Review and Dose-Response Meta-Analysis. Environ Health Perspect 2019;127(4):46002. doi: 10.1289/EHP4381

30. Zhong C, Wang R, Morimoto LM, et al. Outdoor artificial light at night, air pollution, and risk of childhood acute lymphoblastic leukemia in the California Linkage Study of Early-Onset Cancers. Sci Rep 2023;13(1):583. doi: 10.1038/s41598-022-23682-z

31. Wheeler DC, Boyle J, Carli M, et al. Neighborhood Deprivation, Indoor Chemical Concentrations, and Spatial Risk for Childhood Leukemia. Int J Environ Res Public Health 2023;20(4) doi: 10.3390/ijerph20043582

32. Wei T, Jiao R, Nakyeyune R, et al. Exposure to outdoor air pollution at different periods and the risk of leukemia: a meta-analysis. Environ Sci Pollut Res Int 2021;28(27):35376-91. doi: 10.1007/s11356-021-14053-8

33. Khabarova O, Pinaev SK, Chakov VV, et al. Trends in childhood leukemia incidence in urban countries and their relation to environmental factors, including space weather. Front Public Health 2024;12:1295643. doi: 10.3389/fpubh.2024.1295643

34. Williams LA, Haynes D, Sample JM, et al. PM2.5, vegetation density, and childhood cancer: a case-control registry-based study from Texas 1995-2011. J Natl Cancer Inst 2024;116(6):876-84. doi: 10.1093/jnci/djae035

35. Malavolti M, Malagoli C, Filippini T, Wise LA, Bellelli A, Palazzi G, Cellini M, Costanzini S, Teggi S, Vinceti M. Residential proximity to petrol stations and risk of childhood leukemia. Eur J Epidemiol. 2023;38(7):771-782. doi: 10.1007/s10654-023-01009-0.

36. Shrestha A, Ritz B, Wilhelm M, Qiu J, Cockburn M, Heck JE. Prenatal exposure to air toxics and risk of Wilms' tumor in 0- to 5-year-old children. J Occup Environ Med. 2014 Jun;56(6):573-8. doi: 10.1097/JOM.0000000000000167.

37. von Ehrenstein OS, Heck JE, Park AS, Cockburn M, Escobedo L, Ritz B. In Utero and Early-Life Exposure to Ambient Air Toxics and Childhood Brain Tumors: A Population-Based Case-Control Study in California, USA. Environ Health Perspect.82016;124(7):1093-9. doi: 10.1289/ehp.1408582.

38. El Ghissassi F, Baan R, Straif K, Grosse Y, Secretan B, Bouvard V, Benbrahim-Tallaa L, Guha N, Freeman C, Galichet L, Cogliano V; WHO International Agency for Research on Cancer Monograph Working Group. A review of human carcinogens--part D: radiation. Lancet Oncol. 2009;10(8):751-2. doi: 10.1016/s1470-2045(09)70213-x.

39. Abalo KD, Rage E, Leuraud K, et al. Early life ionizing radiation exposure and cancer risks: systematic review and meta-analysis. Pediatric Radiology 2021;51(1):45-56. doi: 10.1007/s00247-020-04803-0

40. Smith-Bindman R, Alber SA, Kwan ML, Pequeno P, Bolch WE, Bowles EJA, Greenlee RT, Stout NK, Weinmann S, Moy LM, Stewart C, Francisco M, Kofler C, Duncan JR, Ducore J, Mahendra M, Pole JD, Miglioretti DL. Medical Imaging and Pediatric and Adolescent Hematologic Cancer Risk. N Engl J Med. 2025;393(13):1269-1278. doi: 10.1056/NEJMoa2502098.

41. Brenner AV, Tronko MD, Hatch M, Bogdanova TI, Oliynik VA, Lubin JH, Zablotska LB, Tereschenko VP, McConnell RJ, Zamotaeva GA, O'Kane P, Bouville AC, Chaykovskaya LV, Greenebaum E, Paster IP, Shpak VM, Ron E. I-131 dose response for incident thyroid cancers in Ukraine related to the Chernobyl accident. Environ Health Perspect. 2011;119(7):933-9. doi: 10.1289/ehp.1002674.

42. Ngoc LTN, Park D, Lee YC. Human Health Impacts of Residential Radon Exposure: Updated Systematic Review and Meta-Analysis of Case-Control Studies. Int J Environ Res Public Health 2022;20(1) doi: 10.3390/ijerph20010097

43. Gandini S, Sera F, Cattaruzza MS, Pasquini P, Picconi O, Boyle P, et al. Meta-analysis of risk factors for cutaneous melanoma: II. Sun exposure. Eur J Cancer 2005; 41:445–60

44. Boniol M, Autier P, Boyle P, Gandini S. Cutaneous melanoma attributable to sunbed use: systematic review and metaanalysis. BMJ 2012; 345: e4757.

45. Masi AC, Stewart CJ. Role of breastfeeding in disease prevention. Microb Biotechnol 2024;17(7):e14520. doi: 10.1111/1751-7915.14520

46. Su Q, Sun X, Zhu L, et al. Breastfeeding and the risk of childhood cancer: a systematic review and dose-response meta-analysis. BMC Med 2021;19(1):90. doi: 10.1186/s12916-021-01950-5

47. Schraw JM, Bailey HD, Bonaventure A, et al. Infant feeding practices and childhood acute leukemia: Findings from the Childhood Cancer & Leukemia International Consortium. Int J Cancer 2022;151(7):1013-23. doi: 10.1002/ijc.34062

48. Soegaard SH, Andersen MM, Rostgaard K, et al. Exclusive Breastfeeding Duration and Risk of Childhood Cancers. JAMA Netw Open 2024;7(3):e243115. doi:910.1001/jamanetworkopen.2024.3115

49. Schraw JM, Petridou ET, Bonaventure A, et al. Breastfeeding and risk of childhood brain tumors: a report from the Childhood Cancer and Leukemia International Consortium. Cancer Causes Control 2023;34(11):1005-15. doi: 10.1007/s10552-023-01746-3

50. Dessypris N, Karalexi MA, Ntouvelis E, et al. Association of maternal and index child's diet with subsequent leukemia risk: A systematic review and meta analysis. Cancer Epidemiol 2017;47:64-75. doi: 10.1016/j.canep.2017.01.003

51. Metayer C, Milne E, Dockerty JD, et al. Maternal supplementation with folic acid and other vitamins and risk of leukemia in offspring: a Childhood Leukemia International Consortium study. Epidemiology 2014;25(6):811-22. doi: 10.1097/EDE.0000000000000141

52. Singer AW, Carmichael SL, Selvin S, et al. Maternal diet quality before pregnancy and risk of childhood leukaemia. Br J Nutr 2016;116(8):1469-78. doi: 10.1017/S0007114516003469

53. Chiavarini M, Naldini G, Fabiani R. Maternal Folate Intake and Risk of Childhood Brain and Spinal Cord Tumors: A Systematic Review and Meta-Analysis. Neuroepidemiology 2018;51(1-2):82-95. doi: 10.1159/000490249

54. Greenop KR, Miller M, Bailey HD, et al. Childhood folate, B6, B12, and food group intake and the risk of childhood brain tumors: results from an Australian case-control study. Cancer Causes Control 2015;26(6):871-9. doi: 10.1007/s10552-015-0562-z

55. Linabery AM, Johnson KJ, Ross JA. Childhood cancer incidence trends in association with US folic acid fortification (1986-2008). Pediatrics 2012;129(6):1125-33. doi: 10.1542/peds.2011-3418

Downloads

Published

2026-07-06

How to Cite

1.
Etzel R, Miller M, Thompson H, et al. Collegium Ramazzini Statement: Need to Enhance Research and Strengthen Policy for Prevention of Childhood Cancer. Eur J Oncol Env Hea. 2026;31(1):19075. doi:10.69137/ejoeh.2026.19075

Most read articles by the same author(s)