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Table 2 Clinicopathological features of the ipsilateral and contralateral breast cancers

From: Assessment of DNA methylation profiling and copy number variation as indications of clonal relationship in ipsilateral and contralateral breast cancers to distinguish recurrent breast cancer from a second primary tumour

  Ipsilateral (n = 16) Contralateral (n = 13)
Age of onset (years)
 Primary
  Median 54 59
  Range 37 – 75 43 – 74
  P-value   0.082
 Second tumour
  Median 59 68
  Range 40 – 82 45 – 80
  P-value   0.070
Age interval (years)a
  Median 4 5
  Range 0 – 14 1 – 9
  P-value   0.604
Tumour size
 Primary
  Median (mm) 17.8 17
  Range (mm) 6 – 50 10 – 40
  P-value   0.711
 Second tumour
  Median (mm) 13.5
  Range (mm) 0.3 – 75
  1. aTime interval between first and second tumour onset