Radiobiology 2016

2 nd lung cancers after RT of breast Ca

Duration of follow-up (years)

Lung cancer mortality ratio

Number of second cancers

Ipsilateral

Contralateral

<10

161

134

1.2

10–15

65

44

1.5

>15

57

21

2.7

Ipsilateral and contralateral second lung cancers in patients treated with post-operative radiotherapy of breast cancer, 1973-2001

Darby SC et al. Lancet Oncol 2005;6:557-65