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Postoperative radiotherapy for breast cancer and coronary artery stenosis: A dosimetry study of 15 patients examined by coronary angiography after breast cancer treatment
Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska fakulteten, Institutionen för radiologi, onkologi och strålningsvetenskap, Enheten för onkologi.
Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska fakulteten, Institutionen för radiologi, onkologi och strålningsvetenskap, Enheten för onkologi.
Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska fakulteten, Institutionen för radiologi, onkologi och strålningsvetenskap, Enheten för biomedicinsk strålningsvetenskap.
Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska fakulteten, Institutionen för kirurgiska vetenskaper.
Vise andre og tillknytning
(engelsk)Manuskript (preprint) (Annet vitenskapelig)
HSV kategori
Forskningsprogram
Onkologi
Identifikatorer
URN: urn:nbn:se:uu:diva-179742OAI: oai:DiVA.org:uu-179742DiVA, id: diva2:545980
Tilgjengelig fra: 2012-08-22 Laget: 2012-08-22 Sist oppdatert: 2013-01-22
Inngår i avhandling
1. Cardiovascular Side Effects of Radiotherapy in Breast Cancer
Åpne denne publikasjonen i ny fane eller vindu >>Cardiovascular Side Effects of Radiotherapy in Breast Cancer
2012 (engelsk)Doktoravhandling, med artikler (Annet vitenskapelig)
Abstract [en]

The aim of the thesis was to study cardiovascular side effects of radiotherapy (RT) in breast cancer (BC).

In a study base of 25,171 women with BC diagnosed 1970-2000, we found a statistically significant 12% increase of stroke, compared to the stroke incidence in the background population.

A case-control study of 282 cases with BC followed by a stroke and 1:1 matched controls with BC but not stroke was performed. In women irradiated to internal mammary chain (IMC) and supraclavicular lymph nodes (SCL) vs. a pooled group of women not irradiated or irradiated to targets other than IMC and SCL, a statistically significant increase of stroke with an odds ratio of 1.8 was observed. There were no associations between BC laterality, targets of RT, and hemisphere location of stroke. The radiation targets IMC and SCL, showed a statistically significant trend for an increased risk of stroke with daily fraction dose.

A study of 199 patients with BC, examined by coronary angiography, detected a four- to seven-fold increase of high grade coronary artery stenosis in mid and distal left anterior descending artery (LAD), including distal diagonal branch, when comparing women with irradiated left-sided BC to those with right-sided. An increase of clinically significant coronary artery stenosis was found in pre-specified hotspot areas for radiation among women irradiated to the left breast/chest wall or to the IMC. Thus, the coronary arteries should be regarded as organs at risk in RT of BC.

In a study of 15 BC patients treated with 3D conformal RT, a marked difference in dose distribution in mid and distal LAD between left- and right-sided BC was demonstrated. Irradiated right-sided BC mainly received low doses of scattered and transmitted radiation to the coronary arteries. On the contrary, tangential RT to the left breast without regional lymph node irradiation yielded coronary artery max doses of approximately 50 Gray to distal LAD, probably not safe concerning late radiation vascular effects.

To conclude, we found cardiovascular side effects in women irradiated for BC, resulting in stroke and coronary artery disease, and showed an association between the targets for RT and the anatomical location of these vascular events.

sted, utgiver, år, opplag, sider
Uppsala: Acta Universitatis Upsaliensis, 2012. s. 77
Serie
Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Medicine, ISSN 1651-6206 ; 800Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Medicine, ISSN 1651-6206
Emneord
Breast Cancer, Radiotherapy, Cardiovascular, Stroke, Coronary artery stenosis, Coronary artery disease
HSV kategori
Forskningsprogram
Onkologi
Identifikatorer
urn:nbn:se:uu:diva-179811 (URN)978-91-554-8446-0 (ISBN)
Disputas
2012-10-05, Auditorium Minus, Gustavianum, Akademigatan 3, Uppsala, 09:00 (svensk)
Opponent
Veileder
Tilgjengelig fra: 2012-09-14 Laget: 2012-08-23 Sist oppdatert: 2013-01-22bibliografisk kontrollert

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