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Table 1 Demographics and clinical pathological features of LiqBreasTrack-enrolled patients

From: Liquid biopsy identifies actionable dynamic predictors of resistance to Trastuzumab Emtansine (T-DM1) in advanced HER2-positive breast cancer

Characteristics

N (%)

Age, years (range)

56.8 (39.4–83.5)

ECOG Performance Status ≤2

22 (100)

IHC molecular markers

Primary tumor tissues

22

  ER+ and/or PgR+

15 (68.2)

  ER- and/or PgR-

7 (31.8)

  HER2 1+/SISH or FISH+

3 (13.6)

  HER2 2+/SISH or FISH+

2 (9.1)

  HER2 3+

17 (77.3)

Metastatic tumor tissues

9

  ER+ and/or PgR+

6 (66.7)

  ER- and/or PgR-

3 (33.3)

  HER2 1+/SISH or FISH+

1 (11.1)

  HER2 2+/SISH or FISH+

3 (33.3)

  HER2 3+

5 (55.6)

Previous lines of therapy

 1

14 (63.6)

 2

7 (31.8)

 3

1 (4.5)

Pertuzumab as first line treatment

  Yes

9 (40.9)

  No

13 (59.1)

Dominant Metastatic sites

 Liver

3 (13.6)

 Lung

3 (13.6)

 Bone

5 (22.7)

 Soft tissues

7 (31.9)

 Brain

4 (18.2)

Number of metastatic sites per patient

 1

8 (36.6)

 2

9 (40.9)

 ≥ 3

5 (22.7)

  1. Previous therapy lines included: Lapatinib plus Capecitabine, Trastuzumab plus Vinorelbine, Trastuzumab plus Carboplatin
  2. IHC Immunoistochemistry, ER Estrogen receptor, PgR Progesterone receptor, SISH/FISH Silver in situ hybridization/Fluorescent in situ hybridization