Characteristic at initial diagnosis | Number of patients | % |
---|---|---|
Total | 51 | 100 |
Median age (years) | 53.4 (32 to 79) | Â |
Median follow-up time (months) | 51.7 (0.9 to 256) | Â |
Stage | Â | Â |
   I to III | 34 | 67 |
   IV | 17 | 33 |
Estrogen receptor | Â | Â |
   Positive | 32 | 63 |
   Negative | 17 | 33 |
   Missing | 2 | 4 |
Human epidermal growth factor receptor 2 | Â | |
   Positive | 15 | 29 |
   Negative | 33 | 65 |
   Missing | 3 | 6 |
PIK3CA mutation | 16 | 31 |