Volume 164, Issue 1 pp. 101-112
Research Paper

Secondary cancers among children with acute lymphoblastic leukaemia treated by the Tokyo Children's Cancer Study Group protocols: a retrospective cohort study

Yasushi Ishida

Corresponding Author

Yasushi Ishida

Department of Paediatrics, St. Luke's International Hospital, Tokyo, Japan

Centre of Clinical Epidemiology, St. Luke's Life Science Institute, Tokyo, Japan

Correspondence: Yasushi Ishida, Department of Paediatrics, St. Luke's International Hospital, 9-1 Akashi-cho, Chuo-ku, Tokyo 104-8460, Japan.

E-mail: [email protected]

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Miho Maeda

Miho Maeda

Department of Paediatrics, Nippon Medical School, Tokyo, Japan

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Kevin Y. Urayama

Kevin Y. Urayama

Centre of Clinical Epidemiology, St. Luke's Life Science Institute, Tokyo, Japan

School of Public Health, University of California, Berkeley, CA, USA

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Chikako Kiyotani

Chikako Kiyotani

Division of Oncology, National Centre for Child Health and Development, Tokyo, Japan

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Yuki Aoki

Yuki Aoki

Department of Paediatrics and Developmental Biology, Tokyo Medical and Dental University, Tokyo, Japan

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Yoko Kato

Yoko Kato

Department of Paediatrics, Jikei University School of Medicine, Tokyo, Japan

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Shoko Goto

Shoko Goto

Department of Paediatrics, Yokohama City University School of Medicine, Yokohama, Japan

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Sachi Sakaguchi

Sachi Sakaguchi

Department of Paediatrics and Adolescent Medicine, Juntendo University School of Medicine, Tokyo, Japan

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Kenichi Sugita

Kenichi Sugita

Department of Paediatrics, Dokkyo Medical University, Tochigi, Japan

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Mika Tokuyama

Mika Tokuyama

Department of Paediatrics, Yachimata Hospital, Chiba, Japan

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Naoya Nakadate

Naoya Nakadate

Department of General Paediatrics, National Centre for Child Health and Development, Tokyo, Japan

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Eizaburo Ishii

Eizaburo Ishii

Department of Paediatrics, Nagano Prefectural Suzaka Hospital, Nagano, Japan

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Masahiro Tsuchida

Masahiro Tsuchida

Department of Paediatrics, Ibaraki Children's Hospital, Mito, Japan

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Akira Ohara

Akira Ohara

First Department of Paediatrics, Toho University, Tokyo, Japan

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on behalf of The QOL committee of Tokyo Children's Cancer Study Group (TCCSG)

The QOL committee of Tokyo Children's Cancer Study Group (TCCSG)

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First published: 10 October 2013
Citations: 18

Summary

With improvement in survival, it is important to evaluate the impact of treatment on secondary cancers in acute lymphoblastic leukaemia (ALL) survivors. A retrospective cohort study comprising 2918 children diagnosed with ALL and enrolled on Tokyo Children's Cancer Study Group (TCCSG) protocols between 1984 and 2005 was conducted to evaluate the incidence of secondary cancers and associated factors including treatment protocol, cranial irradiation and other characteristics of the primary ALL. Thirty-seven patients developed secondary cancers, including acute myeloid leukaemia (n = 11), myelodysplastic syndrome (n = 5), non-Hodgkin lymphoma (n = 2), brain tumours (n = 13) and other solid carcinomas (n = 6) within a median follow-up duration of 9·5 years. The cumulative incidence of any secondary cancers was 1·0% (95% confidence interval (CI), 0·7–1·4%) at 10 years and 2·4% (95% CI, 1·5–3·7%) at 20 years, respectively. Standardized incidence rate ratio of secondary cancers was 9·3 (95% CI, 6·5–12·8). Multivariate analyses showed an increased risk of secondary cancers associated with the recent treatment protocol and cranial irradiation. There was no evidence of a reduction in secondary cancer incidence despite marked decreases in cranial irradiation use in the recent protocols.

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