[Table/Fig-1]:
Patient and tumour characteristics of bilateral breast cancer
| Variable | Synchronous(n=28) | Metachronous(n=2) |
|---|---|---|
| Interval between diagnosis of BBC | ||
| 0 (diag. at presentation) | 25 | 0 |
| 0-6 months | 3 | 0 |
| > 6 months | 0 | 2 |
| Median age in years (range) | 66 (39-85) | 68 |
| Menstrual Status | ||
| Post-menopausal | 22 | 2 |
| Pre-menopausal | 6 | 0 |
| Mode of diagnosis of second tumour | ||
| Clinical | 17 | 1 |
| Mammogram | 11 | 1 |
| Tumour histology (n=60) | ||
| IDC | 48 | 3 |
| DCIS | 6 | 1 |
| Lobular | 1 | 0 |
| Papillary | 1 | 0 |
| SLNB (n=27) | ||
| Total no. of procedures | 24 | 3 |
| Positive for metastasis | 2 | 0 |
| False negative | 0 | 0 |
| Axillary status (n=60) | ||
| Node negative* (37) (61.6%) | 34 | 3 |
| Node positive (23) (39%) | 22 | 1 |
| N1 (1-3 nodes+) | 12 | 0 |
| N2 (4-9 nodes+) | 4 | 0 |
| N3(10 or more nodes+) | 6 | 1 |
| Extra-nodal Invasion | 7 | 0 |
| Lymphovascular invasion | 11 | 1 |
*includes both SLN negative and node negative in final histology after axillary clearance