Table 1 Baseline patients’ characteristics.

From: Molecular imaging predicts lack of T-DM1 response in advanced HER2-positive breast cancer (final results of ZEPHIR trial)

Age at inclusion

Median in years (Range)

54 (30–78)

ECOG - n patients

 0

46

 1

44

Disease type at screening

 Visceral

84

 Non-visceral

6

History of brain metastases - n patients

20

HER2-positivity based on primary tumor - n patients

84

 Confirmed by reference lab

82

 Not confirmed by reference lab

2

 FISH+ only

4

 IHC 2+ with FISH+

11

 IHC 3+ with FISH+

42

 IHC 3+ (no FISH+)

27

HER2-positivity based on metastatic biopsy - n patients

6

 Confirmed by reference lab

6

 Not confirmed by reference lab

0

 FISH+ only

0

 IHC 2+ with FISH+

3

 IHC 3+ with FISH+

2

 IHC 3+ (no FISH+)

1

Hormone receptor status - n patients

 ER+ or PR+ or both

63

 ER- and PR-

27

Prior systemic therapies for advanced disease

 Yes - n patients

83

 No - n patients

7

 Median number of lines (range)

3 (0–11)

 Median number of lines including trastuzumab (range)

2 (0–7)

 Tyrosine kinase inhibitor - number of patients

24

 Pertuzumab - n patients

6

 HSP90 inhibitor - n patients

4

  1. n number, ICH immunohistochemistry, FISH fluorescence in-situ hybridization, ER estrogen receptor, PR progesterone receptor, HSP90 heat shock protein.