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Patient and tumor characteristics (n = 16)
| Median age (range) | 57 (40–77) years |
|---|---|
| Menopausal status | |
| Premenopausal | 4 (25%) |
| Postmenopausal | 12 (75%) |
| Histology | |
| Ductal | 8 (50%) |
| Lobular | 8 (50%) |
| Histologic grade | |
| 1 | 3 (19%) |
| 2 | 11 (69%) |
| 3 | 2 (12%) |
| Clinical T and N stage | |
| T2N0 | 6 (38%) |
| T2N1 | 3 (19%) |
| T3N0 | 2 (13%) |
| T3N1 | 4 (25%) |
| Unknown | 1 (6%) |
| PIK3CA mutation | |
| E542K/V | 2 (13%) |
| E545K | 3 (19%) |
| H1047L/R | 8 (50%) |
| E418G, C420R | 1 (6%) |
| Del/ins | 2 (13%) |
