Radiobiology 2016
2 nd cancers after RT of cervix Ca
Number of 2 nd cancers after radiotherapy/surgery
Site of second cancer
Radiation dose (Gy)
Relative risk afte r >10 years
2 after 10 y 4 after 30 y
Rectum
30–60
274 / 33
Colon
2 4
296 / 56
no increase
>2 after 10 y 6 after 30 y
Bladder
30–60
265 / 23
Stomach
2
143 / 19
1 . 2
Lung
0 . 3
276 / 91
no increase
decrease 20–40% after 10 y and 30 y
Breast
0 . 3
366 / 114
Leukaemia
4 . 5
82 / 15
2
Kleinerman RA et al. Cancer 1995;76:442-52
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