Research Article

Influence of Surgical Technique on Mastectomy and Reexcision Rates in Breast-Conserving Therapy for Cancer

Table 2

Statistically significant differences.

All patients N (%)Cavity shave margins N (%)Standard PM N (%) value

Need for 2nd Operation to Achieve adequate margins?
 Yes229 (43.9)16 (23.9)213 (46.8)0.0003
 No293 (56.1)51 (76.1)242 (53.2)
Reason for 2nd operation
 Positive margin117 (52.9)4 (25)113 (55.1)0.0346
 Close margin (<2 mm)104 (47.1)12 (75)92 (44.9)
If close, type of tumor at margin
 DCIS70 (65.4)9 (75)61 (64.2)0.5377
 Other37 (34.6)3 (25)34 (35.8)
If 2nd operation, was residual tumor present?
 Yes98 (42.8)3 (18.8)95 (44.6)0.0644
 No131 (57.2)13 (81.2)118 (55.4)
Mastectomy eventually performed?
 Yes78 (14.9)3 (4.5)75 (16.5)0.0091
 No444 (85.1)64 (95.5)380 (83.5)
>2 operations required to clear margins?
 Yes46 (8.8)0 (0)46 (10.1)0.0021
 No476 (91.2)67 (100)409 (89.9)

PM: partial mastectomy; DCIS: ductal carcinoma insitu.