Table 2.

Results of a surgical margin analysis post initial breast sparing treatment.

Clinical data	Group I	Group II	p
	n = 505 (%)	n = 597 (%)
Negative margins (benign lesions)	433 (85.7%)	496 (83.1%)	0.1189
Positive margins	72 (14.3%)	101 (16.9%)	0.2373
- invasive cancer	41/72 [56.9%]	57/101 [56.4%]
- DCIS	28/72 [38.9%]	40/101 [39.6%]
- LCIS	3/72 [4.2%]	4/101 [4.0%]
Cancer cells present in a specimen after reoperation	35 (48.6%)	58 (57.4%)	0.0959