Table 3.
Procedures and results in breast cancer patients receiving intraparenchymal vs intradermal injection of radioisotope
| Total | Intraparenchymal injection group | Intradermal injection group | |
| Procedures | 434 | 107 | 327 |
| Previous biopsy | |||
| Surgical | 264 (61%) | 75 (70%) | 189 (58%) |
| Core needle | 170 (39%) | 32 (30%) | 138 (42%) |
| Treatment | |||
| Lumpectomy | 230 (53%) | 80 (75%) | 150 (46%) |
| Mastectomy | 204 (47%) | 27 (25%) | 177 (54%) |
| Positive SLN | 109 (25%) | 24 (22%) | 85 (26%) |
| Average no. of SLN | 1.56 | 1.50 | 1.57 |
| Completion ALND | 144 | 46 | 98 |
SLN indicates sentinel lymph node; ALND, axillary lymph node dissection.