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Table 1 Distribution of clinicopathological variables and immunohistochemical markers

From: Ki67 proliferation in core biopsies versus surgical samples - a model for neo-adjuvant breast cancer studies

  

n (%)

Age: median (range)

63 (25-88) years

 

Primary breast cancer

Yes

49 (98)

 

No*

1 (2)

Tumor size

<20 mm

30 (60)

 

≥20 and <50 mm

16 (32)

 

≥50 mm

4 (8)

Tumor type

Ductal

44 (88)

 

Lobular

5 (10)

 

Mucinous

1 (2)

Histological grade

1

16 (32)

 

2

19 (38)

 

3

15 (30)

Estrogen receptor status**

Positive

45 (90)

 

Negative

4 (10)

Progesterone receptor status**

Positive

37 (74)

 

Negative

13 (26)

HER2 status***

Normal

32 (64)

 

Amplified

8 (16)

 

Unknown

10 (20)

Axillary node Status†

Positive

19 (38)

 

Negative

30 (60)

 

Unknown

1 (20)

  1. * Four women had contralateral primary tumors and one woman had recurrent breast cancer in the ipsilateral breast.
  2. ** Positive estrogen and progesterone receptor status when ≥ 10%
  3. *** Patients ≥ 70 years of age and surgery before May 2008 did not routinely receive an HER2 test.
  4. † See reference given in text.