Descriptive, Technique-Related, and Surgical Follow-up Variables for Breast Cancer Cases in This Study
| Variable | Result |
|---|---|
| Age (y) | 64 (±11.9) |
| Female | 140 (97.2%) |
| Left-sided lesion | 77 (52.4%) |
| Lesion size (mm) | 18.6 (±12.7) |
| Lesion type | |
| IDC | 109 (75.2%) |
| ILC | 14 (9.7%) |
| DCIS | 8 (5.5%) |
| Other | 14 (9.7%) |
| Histologic grade | |
| 1 | 61 (42.1%) |
| 2 | 51 (35.2%) |
| 3 | 31 (21.4%) |
| Histologic type | |
| HR+ | 113 (77.9%) |
| HER2-enriched | 14 (9.7%) |
| Triple-negative | 9 (6.2%) |
| Unknown | 9 (6.2%) |
| Multicentric disease | 17 (13.1%) |
| Previous intervention | |
| Biopsy | 126 (86.9%) |
| WLE | 8 (5.5%) |
| Mastectomy | 1 (0.7%) |
| None | 3 (2.1%) |
| Unknown | 7 (4.8%) |
| Injection site by quadrant | |
| Upper outer | 64 (44.1%) |
| Upper inner | 37 (25.5%) |
| Lower outer | 29 (20%) |
| Lower inner | 14 (9.66%) |
| Retroareolar | 1 (0.7%) |
| Transit on flow | 100 (69%) |
| Time to first node, ≤30 min | 136 (93.8%) |
| Time of last image, ≤60 min | 134 (92.4%) |
| SPECT/CT | 18 (12.6%) |
| IMN visualized | 1 (0.7%) |
| Echelon nodes visualized | 76 (52.4%) |
| SN marked | 144 (99.3%) |
| Postlymphoscintigraphy intervention | |
| SN hot and blue | 127 (87.6%) |
| Concordance at surgery | 140 (96.6%) |
| Nodes excised | 2.8 (±2) |
| Sentinel node–positive | 34 (23.5%) |
| Intervention after SLNB | |
| WLE | 85 (58.6%) |
| Mastectomy | 55 (37.9%) |
| SLNB only | 5 (3.5%) |
| Hookwire | 54 (62.8%) |
IDC = invasive ductal carcinoma; ILC = invasive lobular carcinoma; DCIS = ductal carcinoma in situ; HR+ = hormone receptor–positive; HER2 = human epidermal growth factor receptor 2; WLE = wide local excision; IMN = internal mammary node; SN = sentinel node.
Qualitative data are number and percentage; continuous data are mean ± SD.