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【medical-news】放疗增加儿童肿瘤幸存者的二次原
Radiation increases risk of second primary tumors for childhood survivors
Radiation exposure may increase the risk of brain and spinal column tumors in survivors of childhood cancer, according to a study in the November 1 Journal of the National Cancer Institute .
Survivors of childhood cancer are at an increased risk for developing second cancers, but the risk of these cancers varies based on the original cancer, age a first cancer diagnosis, and primary cancer therapy given. Secondary tumors of the central nervous system (CNS) can have particularly devastating consequences and have been linked to prior treatment for childhood leukemia and brain tumors.
Joseph P. Neglia, M.D., pediatric oncologist and researcher with the University of Minnesota Medical School and Cancer Center in Minneapolis, and colleagues identified secondary CNS tumors in a group of 14,361 5-year survivors of childhood cancer. They also obtained information regarding the patients' exposure to radiation and the chemotherapy used to treat the first cancer.
The authors found that 116 survivors of childhood cancer developed subsequent CNS tumors. Childhood radiation exposure was associated with a higher risk of developing both malignant brain tumors like glioma and benign tumors like meningiomas. The risk of a second tumor increased as the dose of radiation used to treat the first cancer increased. Children under age 5 were especially vulnerable to the development of secondary gliomas. The authors suggest that the increased tumor incidence in children exposed at an early age may mean the developing brain is highly susceptible to radiation's toxic effects.
"Prolonged follow-up of all childhood cancer survivors, particularly those exposed to radiation, is crucial to the early detection of these tumors and should be considered part of the effective therapy of the primary disease," they write.
In an accompanying editorial, Elaine Ron, Ph.D., of the National Cancer Institute in Bethesda, Md., writes, "By identifying persons at high risk of long-term treatment effects, it may be possible to reduce the growing number of patients who develop secondary malignancies by individualizing treatment."
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Contact:
Article: Mary Lawson, 612-624-6165, mlawson@umn.edu
Editorial: NCI Press Officers, 301-496-6641, NCIPressOfficers@mail.nih.gov
Citations:
Article: Neglia JP, Robison LL, Stovall M, Liu Y, Packer RJ, Hammond S, et al. New Primary Neoplasms of the Central Nervous System in Survivors of Childhood Cancer: a Report From the Childhood Cancer Survivor Study. J Natl Cancer Inst 2006; 98:1528-1537.
Editorial: Ron E. Childhood Cancer--Treatment at a Cost. J Natl Cancer Inst 2006; 98:1510-1511.
Note: The Journal of the National Cancer Institute is published by Oxford University Press and is not affiliated with the National Cancer Institute. Attribution to the Journal of the National Cancer Institute is requested in all news coverage. Visit the Journal online at http://jncicancerspectrum.oxfordjournals.org/
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放疗增加肿瘤存活患儿二次原发性肿瘤风险
Radiation exposure may increase the risk of brain and spinal column tumors in survivors of childhood cancer, according to a study in the November 1 Journal of the National Cancer Institute .
据十一月一日《国家肿瘤协会》杂志论文称，放疗可能增加肿瘤存活患儿脑与脊柱肿瘤的发病风险。
Survivors of childhood cancer are at an increased risk for developing second cancers, but the risk of these cancers varies based on the original cancer, age a first cancer diagnosis, and primary cancer therapy given. Secondary tumors of the central nervous system (CNS) can have particularly devastating consequences and have been linked to prior treatment for childhood leukemia and brain tumors.
肿瘤存活患儿二次肿瘤的发病几率增高，依原发肿瘤种类、诊断年龄及原发肿瘤治疗方案而异。中枢神经系统二次肿瘤后果特别严重，与儿童白血病及脑瘤治疗有关。
Joseph P. Neglia, M.D., pediatric oncologist and researcher with the University of Minnesota Medical School and Cancer Center in Minneapolis, and colleagues identified secondary CNS tumors in a group of 14,361 5-year survivors of childhood cancer. They also obtained information regarding the patients' exposure to radiation and the chemotherapy used to treat the first cancer.
儿科肿瘤专家Joseph P. Neglia博士及其同事与明尼苏达医科大学及明尼阿波利斯市癌症中心的研究人员合作，调查了14361名儿童肿瘤五年生存者中神经系统二次肿瘤的发病情况，同时调查了这些患儿第一次肿瘤时的放疗及化疗方案。
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作者:admin@医学,生命科学 2011-02-14 18:24
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