Table 1.
Clinicopathological characteristics of paired primary tumors and distant metastases
| Feature | Grouping | N or value | % |
|---|---|---|---|
| Age at diagnosis of primary tumor (n = 81) | Mean | 52 | |
| Range | 27–83 | ||
| Tumor size in cm (n = 81) | Mean | 3.1 | |
| Range | 0.2–15 | ||
| Unknown | 22 | ||
| Histological grade | I | 4 | 5 |
| II | 26 | 32 | |
| III | 31 | 38 | |
| Unknown | 20 | 25 | |
| PR‐status primary tumor (n = 81) | Positive | 71 | 88 |
| Negative | 10 | 12 | |
| Unknown | 0 | 0 | |
| HER2‐status primary tumor (n = 81) | Positive | 19 | 23 |
| Negative | 62 | 77 | |
| Unknown | 0 | 0 | |
| Lymph node status (n = 81) | Positive | 31 | 38 |
| Negative | 18 | 22 | |
| Unknown | 32 | 40 | |
| Time between primary tumor and metastasis in days | |||
| Total (n = 81) | Mean | 373 | |
| Range | 0–2839 | ||
| Solid metastases (n = 58) | Mean | 152 | |
| Range | 28–459 | ||
| Pleural effusions (n = 23) | Mean | 446 | |
| Range | 0–2839 | ||
| Location of metastasis (n = 210) | Liver | 2 | 1 |
| Lung | 7 | 3 | |
| Brain | 18 | 9 | |
| Skin | 23 | 11 | |
| Bone | 4 | 2 | |
| Uterus/ovary | 4 | 2 | |
| Pleural effusion | 152 | 72 | |
| Adjuvant therapy (n = 210) | |||
| Endocrine therapy | Yes | 72 | 34 |
| No | 63 | 30 | |
| Unknown | 75 | 36 | |
| Chemotherapy | Yes | 69 | 33 |
| No | 53 | 25 | |
| Unknown | 88 | 42 | |