Breast cancer occurrence after low dose radiotherapy of non-malignant disorders of the shoulder

• Verfasst von: Zwicker, Felix [VerfasserIn]
• Verfasst von: Huber, Peter E. [VerfasserIn]
• Verfasst von: Debus, Jürgen [VerfasserIn]
• Titel: Breast cancer occurrence after low dose radiotherapy of non-malignant disorders of the shoulder
• Verf.angabe: Felix Zwicker, Corinna Kirchner, Peter E. Huber, Jürgen Debus, Hansjörg Zwicker, Rudolf Klepper
• E-Jahr: 2019
• Jahr: 28 March 2019
• Umfang: 8 S.
• Illustrationen: Illustrationen
• Fussnoten: Gesehen am 24.05.2019
• Titel Quelle: Enthalten in: Scientific reports
• Ort Quelle: [London] : Macmillan Publishers Limited, part of Springer Nature, 2011
• Jahr Quelle: 2019
• Band/Heft Quelle: 9(2019) Artikel-Nummer 5301, Seite 1-8, 8 Seiten
• ISSN Quelle: 2045-2322
• DOI: doi:10.1038/s41598-019-41725-w
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1666300152

Abstract

Stochastic long-term damages at relatively low doses have the potential for cancer induction. For the first time we investigated the occurrence of breast cancer in female patients after radiotherapy of non-malignant disorders of the shoulder and made a comparison with the estimated spontaneous incidence of mammary carcinoma for this cohort. In a geographically defined district with a population of approximately 100.000 inhabitants, comprehensive data of radiological diagnostics and radiotherapy were registered nearly completely for 41 years; data included mammography and radiotherapy of breast cancer patients as well as of non-malignant disorders. Within this population a collective of 158 women with radiotherapy of the shoulder was investigated. Radiotherapy was performed with cobalt-60 photons (Gammatron) with an average cumulative-dose of 6 Gy. The average follow-up time was 21.3 years. Patients were 55 years old (median) when radiotherapy of the shoulder was performed. Seven patients (4.4%) developed breast cancer after a median of 21 years. According to the incidence statistics, 9.4 +/− 1.8 (95%CI) cases (5.9%) would be expected. In regard to the irradiated shoulder neither the ipsilateral nor the contralateral breasts showed increased rates of breast cancer. An induction of additional breast cancer caused by radiation of non-malignant disorders of the shoulder wasn’t detected in the investigated cohort.