Table 1

Clinicopathologic features of triple negative breast cancers
Variable n = 205
Age at dignosis
Mean ± SD (years) 48.4 ± 12.3
Age specific groups, N (%)
< 30 years 15 (7.3%)
31-40 years 47 (22.9%)
41-50 years 61 (29.8%)
51-70 years 70 (34.1%)
> 70 years 12 (5.9%)
Tumor size
Mean ± SD (mm) 38.2 ± 16.2
Size specific groups, n (%)
≤ 2.0 cm (pT1) 14 (12.7%)
2.0-5.0 cm (pT2) 81 (73.6%)
> 5.0 cm (pT3) 15 (13.6%)
Without surgery/trucut biopsy$ 95
Histological type, n (%)
Infiltrating ductal carcinoma (NOS) 158 (77.1%)
Infiltrating lobular carcinoma 05 (2.4%)
Metaplastic carcinoma 22 (10.7%)
Invasive papillary carcinoma 07 (3.4%)
Infiltrating carcinoma with medullary features 12 (5.9%)
Missed ductal and lobular carcinoma 01 (0.5%)
Histologic grade, n (%)
Grade I (well differentiated)
Grade II (moderately differentiated)
Grade III (poorly differentiated) 10 (4.9%)
65 (31.7%)
130 (63.4%)
Lymphovascular invasion, n (%)
Present
Not present
Cannot be assessed$ 30 (27.3%)
80 (72.7%)
95
Necrosis, n (%)
Geographic necrosis involving > 40% of tumor
Necrosis involving < 40% of tumor
Necrosis is absent 34 (30.9%)
Cannot be completely assessed$ 72 (65.5%)
04 (3.6%)
95
Lymphocytic infiltration, n (%)
Extensive lymphocytic infiltration 21 (19.1%)
Mild to moderate lymphocytic infiltration 89 (80.9%)
Cannot be completely assessed$ 95
Lymph node status, n (%)
Negative lymph nodes (N0) 57 (51.8%)
1-3 positive lymph nodes (N1) 24 (21.8%)
4-9 positive lymph nodes (N2) 11 (10.0%)
≥ 10 positive lymph nodes (N3) 18 (16.4%)
Lymph nodes dissection not done 95
Extranodal extension, n (%)
Present
Not present 15 (13.6%)
Lymph nodes dissection not done 95 (86.4%)
95
Ki-67 proliferation index
Mean ± SD (%) 45.2 ± 25.2
Ki-67 proliferation index, (categories), n (%)
≤ 15% (low)
16-30% (Intermediate)
>30% (High) 32 (15.6%)
37 (18.0%)
136 (66.3%)
Type of surgery n (%)
Modified radical mastectomy
Breast conservation surgery
Surgery not done/trucut biopsy 90 (43.9%)
15 (7.3%)
95 (46.3%)
Laterality n (%)
Right 94 (45.9%)
Left 111 (54.1%)

$Cases are of trucut biopsies without surgery.

Hashmi et al.

Hashmi et al. Diagnostic Pathology 2014 9:43   doi:10.1186/1746-1596-9-43

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