Table 1 Characteristics of the PDX specimen
Characteristic | Number of samples N = 151a(%) |
|---|---|
Age (years) | |
 Median (range) | 53 (28–78) |
Biopsy site of origin | |
 Primary site (Breast) | 38 (25%) |
 Metastatic site | 113 (75%) |
Tumor subtype | |
 HR + HER2- | 64 (42.4%) |
 HR + HER2 +  | 18 (11.9%) |
 HR − HER2 +  | 28 (18.5%) |
 TNBC | 41 (27.2%) |
Histologic subtype | |
 Invasive ductal carcinoma | 140 (92.7%) |
 Invasive lobular carcinoma | 7 (4.6%) |
 Mixed ductal and lobular carcinoma | 3 (2.0%) |
 Metaplastic carcinoma with matrix-producing and squamous cell carcinoma | 1 (1.3%) |