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? | | | | | Yes | 229 (43.9) | 16 (23.9) | 213 (46.8) | 0.0003 | No | 293 (56.1) | 51 (76.1) | 242 (53.2) | Reason for 2nd operation | | | | | Positive margin | 117 (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 | | | | | DCIS | 70 (65.4) | 9 (75) | 61 (64.2) | 0.5377 | Other | 37 (34.6) | 3 (25) | 34 (35.8) | If 2nd operation, was residual tumor present? | | | | | Yes | 98 (42.8) | 3 (18.8) | 95 (44.6) | 0.0644 | No | 131 (57.2) | 13 (81.2) | 118 (55.4) | Mastectomy eventually performed? | | | | | Yes | 78 (14.9) | 3 (4.5) | 75 (16.5) | 0.0091 | No | 444 (85.1) | 64 (95.5) | 380 (83.5) | >2 operations required to clear margins? | | | | | Yes | 46 (8.8) | 0 (0) | 46 (10.1) | 0.0021 | No | 476 (91.2) | 67 (100) | 409 (89.9) |
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PM: partial mastectomy; DCIS: ductal carcinoma insitu.
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