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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)