Table I. Tumor characteristics.
| Characteristic | Total number of tumors N = 196 (%) |
Tumors imaged by both mammography and breast ultrasound n = 104 (%) |
|---|---|---|
| Histology | ||
| Invasive ductal carcinoma | 155 (79.1) | 75 (72.1) |
| Invasive lobular carcinoma | 22 (11.2) | 16 (15.4) |
| Invasive mammary carcinoma | 16 (8.2) | 11 (10.6) |
| Others | 3 (1.5) | 2 (2.0) |
| Tumor grade | ||
| I | 19 (9.7) | 8 (7.7) |
| II | 50 (25.5) | 29 (27.9) |
| III | 122 (62.2) | 63 (60.6) |
| Unknown | 5 (2.6) | 4 (3.8) |
| Estrogen-receptor status | ||
| Positive | 96 (49.0) | 50 (48.1) |
| Negative | 99 (50.5) | 54 (51.9) |
| Unknown | 1 (0.5) | 0 (0.0) |
| Progesterone-receptor status | ||
| Positive | 73 (37.2) | 38 (36.5) |
| Negative | 121 (61.7) | 65 (62.5) |
| Unknown | 2 (1.0) | 1 (1.0) |
| Her-2-neu status | ||
| Positive | 59 (30.1) | 32 (30.8) |
| Negative | 136 (69.4) | 72 (69.2) |