Table 1. Patient characteristics.
| Characteristic | Benign IMLN (n = 19) No. (%) |
Malignant IMLN (n = 40) No. (%) |
p-value |
|---|---|---|---|
| Age (yr)* | 48.7 ± 10.4 | 50.5 ± 10.7 | 0.547 |
| Tumor size (mm)* | 37.2 ± 33.4 | 40.6 ± 28.7 | 0.689 |
| Tumor location | 0.977 | ||
| Lateral | 11 (57.9) | 23 (57.5) | |
| Medial | 8 (42.1) | 17 (42.5) | |
| Axillary LN metastasis | 0.008 | ||
| Negative | 9 (47.4) | 6 (15.0) | |
| Positive | 10 (52.6) | 34 (85.0) | |
| Distant metastasis | 0.633 | ||
| Negative | 14 (73.7) | 27 (67.5) | |
| Positive | 5 (26.3) | 13 (32.5) |
IMLN=internal mammary lymph node; LN=lymph node.
*Mean±SD.