|  | PIK3CA mutated | ERBB mutated | PIK3CA/ERBB mutateda |
---|---|---|---|---|
Tumour group | Total no. of tumours | No. of tumours (%) | No. of tumours (%) | No. of tumours (%) |
ER status | ||||
 Negative | 29 | 8 (27.6) | 1 (3.4) | 8 (27.6) |
 Positive | 45 | 10 (22.2) | 7 (15.6) | 15 (33.3) |
PR status | ||||
 Negative | 43 | 9 (20.9) | 5 (11.6) | 14 (32.6) |
 Positive | 31 | 8 (25.8) | 3 (9.7) | 9 (29) |
Treatment arm | ||||
 TCL | 10 | 3 (30) | 2 (20) | 3 (30) |
 TCH | 32 | 9 (28.1) | 2 (6.3) | 10 (31.3) |
 TCHL | 32 | 6 (18.8) | 4 (12.5) | 10 (31.3) |