1169 / 1173
2
nd
lung cancers after RT of breast Ca
Number of second cancers
Duration of
follow-up
(years)
Ipsilateral
Contralateral
Lung cancer
mortality
ratio
<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