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Table 2 Molecular characteristics of the MA and BL tumors groups (%)

From: Molecular apocrine breast cancers are aggressive estrogen receptor negative tumors overexpressing either HER2 or GCDFP15

 

Molecular apocrine

Basal-like

P-value

No. patients

58

13

 

ER expression (mRNA) (pos >20)

-negative

58 (100)

13 (100)

>0.99

HER2 expression (mRNA) (pos >7)

-positive

-negative

-nd

38 (68)

18 (32)

2

0 (0)

13 (100)

0

<0.0001

AR expression (mRNA) (pos >100)

-positive

-negative

58 (100)

0 (0)

2 (15)

11 (85)

<0.0001

FOXA1 expression (mRNA) (pos >100)

-positive

-negative

58 (100)

0 (0)

0 (0)

13 (100)

<0.0001

PIK3CA status:

-wild type

-mutated

- exon 9: E542K and E545K

- exon 20: H1047R

47 (81)

11 (19)

1

10

13 (100)

0

0

0

0.20

TP53 status (FASAY test)

-functional

-nonfunctional

29 (50)

29 (50)

0 (0)

13 (100)

0.0005

  1. AR, androgen receptor; BL, basal-like; ER, estrogen receptor; HER2, Human Epidermal Growth Factor Receptor 2; MA, molecular apocrine.