Table 2 Excision after flat epithelial atypia alone on core biopsy

From: Management of flat epithelial atypia on breast core biopsy may be individualized based on correlation with imaging studies

Total

No atypia

FEA

ADH

ALH

DCIS

Invasive

73

20 (27%)a

31 (42%)

14 (19%)

3 (4%)

3 (4%)

2 (3%)

  1. Abbreviations: ADH, atypical ductal hyperplasia; ALH, atypical lobular hyperplasia; DCIS, ductal carcinoma in situ; FEA, flat epithelial atypia; Invasive, invasive carcinoma.
  2. Of the 94 core biopsies with flat epithelial atypia alone, 21 were excluded from further study. The overall rate of upgrade to carcinoma for the remaining 73 core biopsies was 7% (5/73). Ductal carcinoma in situ and a low-grade invasive ductal carcinoma, no special type, were present in 3 (4%) and 2 (3%) excision specimens, respectively. Seventeen excision specimens (23%) contained another, higher risk pattern of atypia (atypical ductal or atypical lobular hyperplasia).
  3. aPercentages rounded to nearest integer.
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