Variable | Frequency | % | Frequency | % |
1) Location of tumour | Recurrence group |
| No recurrence group |
|
a) Side of tumour |
|
|
|
|
Left | 19 | 63.3 | 74 | 52.4 |
Right | 11 | 36.7 | 67 | 47.6 |
b) Quadrant of tumour |
|
|
|
|
Upper outer quadrant | 25 | 83.3 | 113 | 80.1 |
Upper inner quadrant | 2 | 6.7 | 6 | 4.3 |
Lower outer quadrant | 2 | 6.7 | 6 | 4.3 |
Lower inner quadrant | 1 | 3.3 | 3 | 2.1 |
Paracentral | 0 | 0 | 13 | 9.2 |
2) Staging of tumour |
|
|
|
|
a) T stage |
|
|
|
|
T1 | 2 | 6.6 | 13 | 9.2 |
T2 | 15 | 50 | 77 | 54.6 |
T3 | 10 | 33.3 | 36 | 25.5 |
T4 | 3 | 10 | 15 | 10.6 |
b) N stage |
|
|
|
|
N0 | 10 | 33.3 | 65 | 46.1 |
N1 | 6 | 20 | 46 | 32.6 |
N2 | 8 | 26.6 | 20 | 14.2 |
N3 | 6 | 20 | 10 | 7.1 |
c) Composite stage |
|
|
|
|
Stage I | 0 | 0 | 11 | 7.8 |
Stage II | 14 | 46.6 | 74 | 52.4 |
Stage III | 16 | 53.3 | 56 | 39.7 |
3) Pathological features |
|
|
|
|
a) Histological subtypes |
|
|
|
|
Infiltrating ductal carcinoma | 29 | 96.6 | 128 | 90.7 |
Metaplastic carcinoma | 1 | 3.3 | 8 | 5.6 |
Others | 0 | 0 | 5 | 3.5 |
b) Grade of tumour |
|
|
|
|
1 | 1 | 3.3 | 7 | 4.9 |
2 | 14 | 46.6 | 79 | 56 |
3 | 15 | 50 | 55 | 39 |
c) Lymphovascular invasion |
|
|
|
|
Yes | 8 | 26.7 | 16 | 11.3 |
No | 22 | 73.3 | 125 | 88.6 |
d) Multifocality |
|
|
|
|
Yes | 1 | 3.3 | 4 | 2.8 |
No | 29 | 96.7 | 137 | 97.2 |