Table 2.
Surgical resection margin status and additional surgery [n = 4038]
| RSL [n = 1851 (45.8%)] |
WGL [n = 2187 (54.6%)] |
p value | |
|---|---|---|---|
| Resection margins, cm [mean (SD)] | 0.33 (0.29) | 0.35 (0.30) | 0.089 |
| Resection_margins_cat | |||
| < 2 mm | 984 (53.2) | 1142 (52.2) | 0.505 |
| ≥ 2 mm | 856 (46.2) | 1038 (47.5) | |
| Unknowna | 11 (0.6) | 7 (0.3) | |
| Radicality | |||
| Free | 1451 (78.4) | 1699 (77.7) | 0.531 |
| Focally not radical | 253 (13.7) | 314 (14.4) | |
| More than focally not radical | 136 (7.3) | 167 (7.6) | |
| Unknowna | 11 (0.6) | 7 (0.3) | |
| First re-excision | |||
| Yes | 234 (12.6) | 296 (13.5) | 0.429 |
| No | 1617 (87.4) | 1891 (86.5) | |
| Type of first re-excision | |||
| Breast-conserving surgery | 162 (69.2) | 176 (59.5) | 0.029 |
| Mastectomy | 72 (30.8) | 119 (40.2) | |
| Unknowna | 0 | 1 (0.3) | |
| Findings in first re-excision specimen | |||
| No rest | 80 (34.2) | 103 (34.8) | 0.888 |
| DCIS | 147 (62.8) | 186 (62.8) | |
| LCIS | 1 (0.4) | 2 (0.7) | |
| Invasive carcinoma | 6 (2.6) | 5 (1.7) | |
| Second re-excision | |||
| Yes | 18 (7.7) | 26 (8.8) | 0.769 |
| No | 216 (92.3) | 270 (91.2) | |
| Type of second re-excision | |||
| Breast-conserving surgery | 2 (11.1) | 2 (7.7) | 1 |
| Mastectomy | 16 (88.9) | 24 (92.3) | |
| Findings in second re-excision specimen | |||
| DCIS | 17 (94.4) | 26 (100.0) | 0.852 |
| No rest | 1 (5.6) | 0 (0.0) | |
Data are expressed as n (%) unless otherwise specified
RSL radioactive seed localization, WGL wire-guided localization, SD standard deviation, DCIS ductal carcinoma in situ, LCIS lobular carcinoma in situ
aExcluded from the analysis
Bolded p-values indicate significance