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Table 2 Comparison of CT and pathologically determined tumor sizes

From: The value of chest CT for prediction of breast tumor size: comparison with pathology measurement

   Size (median ± SD) Concordance with CT(%) Discordance with CT(%)
  n (%) CT Pathology   Overestimated by CT Underestimated by CT
Overall 285 (100) 19±10 20±13 228 (80) 21 (7) 36 (13)
CT groupa       
Group 1 (<20 mm) 139 (49) 15±5 13±4 123 (88) 15 (11) 1 (1)
Group 2 ( 20 mm) 146 (51) 27±10 30±13 105 (72) 6 (4) 35 (24)
Tumor typeb       
IDC 245 (86) 20±10 20±12 202 (83) 18 (7) 25 (10)
Non-IDC 40 (14) 18±11 19±14 26 (65) 3 (8) 11 (28)
  1. a Comparison of group 1 to group 2, P<0.001.
  2. b Comparison across tumor types, P = 0.011.