Table 1 Patient characteristics on core biopsy (n = 40).

Age (years)
Mean (SD)	50.0 (7.1)
Median	49
Histopathology on mammotome core biospy
Benign (innocuous CCL)	8
Atypical lobular hyperplasia	4
Atypical ductal hyperplasia	19
CCLs with nuclear atypia	8
DCIS	1
No of cases with open excision follow‐up	24

CCL, columnar cell lesion; DCIS, ductal carcinoma in situ.