Table 4.

Correlation of BPE and histological accuracy of additional MRI findings

		BPE
Change in operative procedure	Additional MRI findings	Minimal	Mild	Moderate	Marked	total
		n=12	n=6	n=2	n=4	n=24
Extended excision	true positive	6	2	0	0	8
	false positive	1	1	1	1	4
	PPV	85.7%	66.7%	0%	0%	66.7%
Mastectomy	true positive	5	2	0	0	7
	false positive	0	1	1	3	5
	PPVa	100%	66.7%	0%	0%	58.3%
Total	true positive	11	4	0	0	15
	false positive	1	2	2	4	9
	PPVb	91.7%	66.7%	0%	0%	62.5%

^ap = 0.026

^bp = 0.002.