Table 1.
Demographic and clinicopathologic characteristics of newly diagnosed breast cancer patients undergoing axillary ultrasound
| Characteristic | Number of patients (n = 647) n (%) |
|---|---|
| Age | |
| Median, years (range) | 58 (28–88) |
| Tumor Histology | |
| Invasive ductal | 533 (82) |
| Invasive lobular | 49 (8) |
| Other | 65 (10) |
| Tumor Size | |
| T1 | 368 (57) |
| T2 | 276 (42) |
| Tumor Grade | |
| I | 169 (26) |
| II | 231 (36) |
| III | 245 (38) |
| ER status | |
| Positive | 490 (76) |
| Negative | 156 (24) |
| Unknown | 1 (<1) |
| PR status | |
| Positive | 457 (71) |
| Negative | 189 (29) |
| Unknown | 1 (<1) |
| HER2 status | |
| Positive | 94 (15) |
| Negative | 549 (85) |
| Unknown | 4 (<1) |
| Neoadjuvant therapy | 108 (17) |
| Median F/U (months) | 38.0 (0–130) |
| Recurrence | |
| Breast | 6 (<1) |
| Axilla | 7 (1) |
| Distant | 30 (5) |
ER, estrogen receptor; PR, progesterone receptor, F/U, follow-up