Table 3.

Type of PIK3CA mutations

PIK3CA mutations
Histologic type
ExonNucleotide change (amino acid change)Lobular (19 cases)Ductal (144 cases)
9G1624A (E542K)57
9G1633A (E545K)38
9A1634G (E545G)1
20A3140G (H1047R)217
20A3140T (H1047L)2
Total (%)10 (53)35 (24)