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Table 2 Comparisons of main pathological outcome measures and findings between palpation-guided and US-guided lumpectomy groups

From: Intraoperative ultrasound reduces the need for re-excision in breast-conserving surgery

Characteristic

Palpation-guided lumpectomy

US-guided lumpectomy

p value

Tumor size, mean (SD)

24.9 (12.2)

22.8 (10.8)

0.24

Resection volume at first excision, cubic centimeter, (SD)

108.1 (63.4)

89.9 (53.9)

0.048

Intraoperative re-excision

   

 Yes

30 (37 %)

24 (29 %)

 

 No

50 (63 %)

60 (71 %)

0.25

Need for second operation to achieve adequate margins

   

 Yes

14 (17 %)

5 (6 %)

 

 No

66 (83 %)

79 (94 %)

0.03

Tumor identified at intraoperative re-excision specimen

   

 Yes

5 (17 %)

7 (29 %)

 

 No

25 (83 %)

17 (71 %)

0.33

Tumor identified at second operation specimen

   

 Yes

7 (50 %)

3 (60 %)

 

 No

7 (50 %)

2 (40 %)

0.9