Baral E, Larsson L E, Mattsson B
Cancer. 1977 Dec;40(6):2905-10. doi: 10.1002/1097-0142(197712)40:6<2905::aid-cncr2820400621>3.0.co;2-y.
During the period 1927--1957 1,115 women were treated at Radiumhemmet, Sweden with ionizing radiation for different non-neoplastic conditions of the breast. The average follow-up period was 31.5 years. The number of breast cancers occurring after irradiation was found to be four times the expected number and the breast cancer incidence rate in the irradiated breasts is dependent on the age of the patient at the first irradiation.
1927年至1957年期间，瑞典镭疗医院对1115名患有不同乳腺非肿瘤性疾病的女性进行了电离辐射治疗。平均随访期为31.5年。结果发现，放疗后发生的乳腺癌病例数是预期病例数的四倍，且放疗乳房的乳腺癌发病率取决于患者首次放疗时的年龄。
