Table 1 Patient (N = 35) and lesion (N = 36) characteristics

From: Progesterone Receptor Gene Variants in Metastatic Estrogen Receptor Positive Breast Cancer

Characteristics Number (N) %
Metastatic site
  Bone 13 36
  Brain 6 17
  Chest wall 3 8
  Liver 4 11
  Lung or pleura 4 11
  Lymph node 6 17
Primary tumor histology
  Invasive ductal carcinoma 26 74
  Invasive lobular carcinoma 2 6
  Other/unknown 7 20
Primary tumor grade
  1 3 9
  2 15 43
  3 8 23
Adjuvant endocrine therapy
  Aromatase inhibitor 9 26
  Tamoxifen 14 40
  Both 12 34
Alive at last follow-up 17 49
PGR variant 24 67