Table 3.
Characteristics of patients with and without occult invasion
| Characteristics | Invasion detected | Invasion undetected | P‐value | ||
|---|---|---|---|---|---|
| n | % | n | % | ||
| Number of patients | 10 | 100.0 | 14 | 100.0 | |
| Age (years) | |||||
| Median (range) | 52.5 (37–75) | 50.5 (40–75) | 0.86 | ||
| Palpability | |||||
| Palpable | 3 | 30.0 | 4 | 28.6 | 1.00 |
| Non‐palpable | 7 | 70.0 | 10 | 71.4 | |
| Mammographic findings | |||||
| Mass | 2 | 20.0 | 4 | 28.6 | 0.84 |
| Calcification | 5 | 50.0 | 8 | 57.1 | |
| Others | 2 | 20.0 | 1 | 7.1 | |
| None | 1 | 10.0 | 1 | 7.1 | |
| Breast biopsy method | |||||
| Needle with vacuum assist | 6 | 60.0 | 9 | 64.3 | 1.00 |
| Needle without vacuum assist | 3 | 30.0 | 3 | 21.4 | |
| Ductoscopic | 1 | 10.0 | 2 | 14.3 | |
| Period from breast biopsy to surgery (days) | |||||
| Median (range) | 74 (47–98) | 81.5 (13–281) | 0.40 | ||
| Breast surgery | |||||
| Partial mastectomy | 5 | 50.0 | 9 | 64.3 | 0.68 |
| Total mastectomy | 5 | 50.0 | 5 | 35.7 | |
| Pathological size (cm) | |||||
| Median (range) | 3.95 (1.7–6.6) | 5.05 (2.6–6.8) | 0.27 | ||
| Subtype | |||||
| Comedo | 2 | 20.0 | 4 | 28.6 | 1.00 |
| Non‐comedo | 8 | 80.0 | 10 | 71.4 | |
| Nuclear grade | |||||
| 1 | 6 | 60.0 | 8 | 57.1 | 1.00 |
| 2 | 2 | 20.0 | 4 | 28.6 | |
| 3 | 2 | 20.0 | 2 | 14.3 | |
| Estrogen receptor | |||||
| + | 8 | 80.0 | 14 | 100.0 | 0.16 |
| − | 2 | 20.0 | 0 | 0.0 | |
| Progesterone receptor | |||||
| + | 8 | 80.0 | 11 | 78.6 | 1.00 |
| − | 2 | 20.0 | 3 | 21.4 | |
| Number of step‐section specimen (slides) | |||||
| Median (range) | 56 (17–344) | 57.5 (29–168) | 0.52 | ||