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. Author manuscript; available in PMC: 2022 Nov 18.
Published in final edited form as: Eur Radiol. 2022 Apr 29;32(11):7448–7462. doi: 10.1007/s00330-022-08815-2

Table 3.

Distribution of lesion types by pathology in total of 527 breast lesions

Breast lesions lesion number Percentage
Total breast lesions 527 NA
  Total benign lesions 316 60% (316/527)
  Fibroadenoma 114 36% (114/316)
  Benign changes/stromal fibrosis 77 24% (77/316)
  Fibrocystic changes 31 10% (31/316)
  Papilloma 28 9% (9/316)
  Pseudoangiomatous stromal hyperplasia 22 7% (22/316)
  Fat necrosis 18 6% (6/316)
  Atypiaa 14 4% (14/316)
  Duct ectasia 6 2% (6/316)
  Adenosis 4 1% (4/316)
  Othersb 2 1% (2/316)
Total malignant lesions 211 40% (211/527)
  Primary breast carcinomas 209 99% (209/211)
  Invasive ductal carcinoma 138 66% (138/209)
  Invasive mammary carcinoma with mixed ductal and lobular features 30 14% (30/209)
  Invasive lobular carcinoma 26 12% (26/209)
  Ductal carcinoma in situ 15 7% (15/209)
  Non-mammary malignancies in breast 2 1% (2/211)
  Malignant grade for invasive breast carcinomas 194
  Grade I 50 26% (50/194)
  Grade II 92 47% (92/194)
  Grade III 52 27% (52/194)
  Malignant grade for ductal carcinoma in situ 15
  Low grade 7 46% (7/15)
  Intermediate grade 4 27% (4/15)
  High grade 4 27% (4/15)
a

Atypia: 8 atypical ductal hyperplasia, 2 atypical lobular hyperplasia, 2 atypical papillary lesion, 1 radial scar with focal residual atypical hyperplasia associated with flat epithelial atypia and 1 atypical/high risk and fibrocystic changes.

b

Others: 1 ductal hyperplasia and 1 organizing abscess with associated granulomatous reaction. Number in parentheses represent the numerator and denominator for the corresponding percentage.