Table 1 Clinicopathologic features of cohort.

From: Histologic grading of breast carcinoma: a multi-institution study of interobserver variation using virtual microscopy

Parameters

Number of cases (%)

Age (years)

 

 Range

29–98

 Mean

63

 Median

64

Laterality

 

 Right

67 (46.8)

 Left

76 (53.2)

Tumor size (cm)

 

 Range

0.4–5.5

 Mean

1.5

 Median

1.2

Histologic type

 

 Ductal-no special type

108 (75.5)

 Lobular

23 (16.1)

 Tubular/Cribriform

4 (2.8)

 Pure mucinous

2 (1.4)

 Invasive solid papillary

2 (1.4)

 Invasive mucinous with micropapillary features

1 (0.7)

 Invasive micropapillary carcinoma

1 (0.7)

 Invasive tubulolobular carcinoma

1 (0.7)

 Invasive carcinoma with squamous metaplastic features

1 (0.7)

Estrogen receptor

 

 Positive

131 (91.6)

 Negative

12 (8.4)

Progesterone receptor

 

 Positive

122 (85.3)

 Negative

21 (14.7)

HER2

 

 Positive

8 (5.6)

 Negative

132 (92.3)

 Equivocal

3 (2.1)

pT category

N = 138

 (m)

4 (2.9)

 1a

8 (5.8)

 1b

46 (33.3)

 1c

53 (38.4)

 2

28 (20.3)

 3

2 (1.5)

 4

1 (0.7)

pN category

N = 138

 0

101 (73.2)

 1 mi

1 (0.7)

 1a

15 (10.9)

 2a

5 (3.6)

 3a

2 (1.5)

 Unknown

14 (10.1)

  1. cm centimeters.