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Table 1 Tissue sampling and heterogeneity assessment

From: Quantitative assessment of the spatial heterogeneity of tumor-infiltrating lymphocytes in breast cancer

Characteristic Number %
Age at diagnosis
 ≥50 23 69.7
 <50 10 30.3
Histological grade
 1 0 0
 2 20 60.6
 3 13 39.4
Tumor size
 <2 cm 6 18.2
 2–5 cm 25 75.8
 ≥5 cm 2 6.1
ER status
 ER positive 23 69.7
 ER negative 10 30.3
PgR status
 PgR positive 19 57.6
 PgR negative 14 42.4
HER2 status
 HER2 positive 5 15.2
 HER2 negative 28 84.8
  1. Whole tissue serial sections of core biopsies from different regions of the same cancer were prepared and multiple fields of view (FOV) were assessed in each section
  2. ER estrogen receptor, PgR progesterone receptor. HER2 human epidermal growth factor receptor 2