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Table 2 Characteristics of patients aged < 50 years with discordances in recurrence scores ≤ 4 units, compared to > 4 units

From: Discordance in 21-gene recurrence scores between paired breast cancer samples is inversely associated with patient age

Characteristics

≤ 4 unit change

n (%)

> 4 unit change

n (%)

Total number

9

7

Median age at diagnosis

47

45

 Years; range

41–49

37–47

Median days between samples

23

14

 Days; range

10–42

9–29

Tumour type

 IDC

8 (89)

5 (72)

 ILC

1 (11)

1 (14)

 Other

0 (0)

1 (14)

Tumour grade

 1

3 (33)

2 (29)

 2

3 (33)

2 (29)

 3

3 (33)

2 (29)

 Unknown

0 (0)

1 (14)

Tumour size

 ≤ 10 mm

2 (22)

0 (0)

 11–20 mm

4 (44)

2 (29)

 21–50 mm

2 (22)

2 (29)

 > 50 mm

1 (11)

2 (29)

 Unknown

0 (0)

1 (14)

Lymph node status

 Positive

2 (22)

3 (43)

 Negative

7 (78)

3 (43)

 Unknown

0 (0)

1 (14)

Lymphovascular invasion

 Present

2 (22)

1 (14)

 Absent

7 (78)

6 (86)