Figure 2. Examples of PIK3CA Sanger sequencing results.
A, Concordant somatic PIK3CA mutation (A3140G) in IDC and adjacent DCIS. B, Intra-tumor heterogeneity for PIK3CA mutation. One of the invasive areas of this tumor had exon 20 A3140G (H1047R) mutation whereas other invasive and adjacent DCIS were wild type.