Table 1 Clinicopathological characteristics of the 23 male breast cancer samples

Age

71.2 ± 9.0 (72.0)

Tumor size

20.0 ± 9.6 (20.0)

Diagnosis

   Invasive ductal carcinoma

11 (47.8%)

   Invasive ductal carcinoma + ductal carcinoma in situ

12 (52.2%)

Nuclear grade

   I

3 (13.0%)

   II

11 (47.8%)

   III

9 (39.1%)

Histological grade

   I

2 (8.7%)

   II

12 (52.2%)

   III

9 (39.1%)

Cytokeratin 5/6

   0

19 (82.6%)

   +

1 (4.3%)

   ++

3 (13.0%)

   +++

0 (0.0%)

Cytokeratin 14

   0

19 (82.6%)

   +

2 (8.7%)

   ++

0 (0.0%)

   +++

2 (8.7%)

Cytokeratin 18

   0

1 (4.3%)

   +

0 (0.0%)

   ++

3 (13.0%)

   +++

19 (82.6%)

pT

   1

13 (56.5%)

   2

10 (43.5%)

pN

   0

8 (34.8%)

   1

8 (34.8%)

   2

1 (4.3%)

   x

6 (26.1%)

pM

   0

8 (34.8%)

   1

2 (8.7%)

   x

13 (56.5%)

Estrogen receptors

   Positive

12 (95.7%)

   Negative

1 (4.3%)

   Not available

10

Progesterone receptors

   Positive

13 (100.0%)

   Negative

0 (0.0%)

   Not available

10