Table 2 Characteristics of sentinel lymph node(s), total and by study site
Total | Site 1 | Site 2 | ||||||
|---|---|---|---|---|---|---|---|---|
Count | % | Count | % | Count | % | p value* | ||
Number of extracted SLN(s) | 1 | 158 | 27.0% | 90 | 22.8% | 68 | 35.6% | < 0.001 |
2 | 198 | 33.8% | 124 | 31.4% | 74 | 38.7% | ||
3 + | 230 | 39.2% | 181 | 45.8% | 49 | 25.7% | ||
Metastases in SLN | No | 432 | 73.7% | 293 | 74.2% | 139 | 72.8% | 0.718 |
Yes | 154 | 26.3% | 102 | 25.8% | 52 | 27.2% | ||
Number of metastases in SLN(s) | 1 | 108 | 70.1% | 68 | 66.7% | 40 | 76.9% | 0.313 |
2 | 33 | 21.4% | 25 | 24.5% | 8 | 15.4% | ||
3 | 10 | 6.5% | 6 | 5.9% | 4 | 7.7% | ||
4 | 3 | 1.9% | 3 | 2.9% | 0 | 0.0% | ||
Size largest SLN-metastasis (mm), mean (range) | 5.2 (0.2—38.0) | 5.1 (0.2—38.0) | 5.3 (0.3—26.0) | 0.857 | ||||
SLN metastases, categorized | No metastases | 432 | 73.7% | 293 | 74.2% | 139 | 72.8% | 0.928 |
Micro: > 0.2 mm, ≤ 2 mm | 64 | 10.9% | 42 | 10.6% | 22 | 11.5% | ||
Macro: > 2 mm | 90 | 15.4% | 60 | 15.2% | 30 | 15.7% | ||