TY - JOUR
T1 - The impact of involved node, involved field and mantle field radiotherapy on estimated radiation doses and risk of late effects for pediatric patients with Hodgkin lymphoma
AU - Maraldo, M. V.
AU - Jørgensen, M.
AU - Brodin, N. P.
AU - Aznar, M. C.
AU - Vogelius, I. R.
AU - Petersen, P. M.
AU - Berthelsen, A. K.
AU - Christensen, C. B.
AU - Hjalgrim, L. L.
AU - Specht, L.
PY - 2014/4
Y1 - 2014/4
N2 - Background: The use of radiotherapy (RT) is debated for pediatric patients with Hodgkin lymphoma (HL) due to the late effects of treatment. Radiation doses to the thyroid, heart, lungs, and breasts are compared with the extensive mantle field (MF), Involved Field RT (IFRT), Modified IFRT (mIFRT), and Involved Node RT (INRT) and the risk of radiation-induced cardiovascular disease, secondary cancers, and the corresponding Life Years Lost (LYL) is estimated with each technique. Procedure: INRT, mIFRT, IFRT, and MF plans (20 and 30Gy) were simulated for 10 supradiaphragmatic, clinical stage I-II classical HL patients ≤18 years old, total of 4×2 plans for each patient. The lifetime excess risks of cardiac morbidity, cardiac mortality, lung, breast, and thyroid cancer with each technique were estimated. The estimated excess risks attributable to RT were based on HL series with long-term follow-up, treating death from other causes as competing risks. The corresponding LYL were derived from the estimated excess risks. Statistical analyses were performed with repeated measures ANOVA. Results: Both a reduction in field size and in prescribed radiation dose significantly lowered the estimated dose to the heart, lungs, breasts, and thyroid compared to past, extended fields, even for patients with mediastinal disease. This translated into a significantly reduced estimated risk of cardiovascular disease, secondary cancers, and LYL. Conclusions: Involved Node Radiotherapy should be considered for pediatric patients with Hodgkin lymphoma since it is estimated to substantially lower the risk of severe long-term complications. Pediatr Blood Cancer 2014;61:717-722.
AB - Background: The use of radiotherapy (RT) is debated for pediatric patients with Hodgkin lymphoma (HL) due to the late effects of treatment. Radiation doses to the thyroid, heart, lungs, and breasts are compared with the extensive mantle field (MF), Involved Field RT (IFRT), Modified IFRT (mIFRT), and Involved Node RT (INRT) and the risk of radiation-induced cardiovascular disease, secondary cancers, and the corresponding Life Years Lost (LYL) is estimated with each technique. Procedure: INRT, mIFRT, IFRT, and MF plans (20 and 30Gy) were simulated for 10 supradiaphragmatic, clinical stage I-II classical HL patients ≤18 years old, total of 4×2 plans for each patient. The lifetime excess risks of cardiac morbidity, cardiac mortality, lung, breast, and thyroid cancer with each technique were estimated. The estimated excess risks attributable to RT were based on HL series with long-term follow-up, treating death from other causes as competing risks. The corresponding LYL were derived from the estimated excess risks. Statistical analyses were performed with repeated measures ANOVA. Results: Both a reduction in field size and in prescribed radiation dose significantly lowered the estimated dose to the heart, lungs, breasts, and thyroid compared to past, extended fields, even for patients with mediastinal disease. This translated into a significantly reduced estimated risk of cardiovascular disease, secondary cancers, and LYL. Conclusions: Involved Node Radiotherapy should be considered for pediatric patients with Hodgkin lymphoma since it is estimated to substantially lower the risk of severe long-term complications. Pediatr Blood Cancer 2014;61:717-722.
KW - Hodgkin lymphoma
KW - Late effects
KW - Long-term survival
KW - Radiotherapy
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U2 - 10.1002/pbc.24861
DO - 10.1002/pbc.24861
M3 - Article
C2 - 24660228
AN - SCOPUS:84893478094
SN - 1545-5009
VL - 61
SP - 717
EP - 722
JO - Pediatric Blood and Cancer
JF - Pediatric Blood and Cancer
IS - 4
ER -