In contrast, in SHR-negative larger tumours (≥ 2 cm), patients with PIK3CA- mutations ( n = 14) showed a trend to better 5 years-RFI probability (85.7%) compared to those with wildtype PIK3CA (5 years RFI 66.1%, HR 2.75; 95% CI 0.657–11.527).
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The sentences
In SHR-positive BCs with PIK3CA-mutations, a strong trend for impaired RFI was observed (adjusted HR 1.64, 95% CI 0.958–2.807), whilst in SHR-negative BCs PIK3CA -mutations were insignificantly associated with improved RFI (adjusted HR 0.49; 95% CI 0.152–1.597).