PIK3CA and neoplasm: The tumor was also tested for mutations in exons 2, 3, and 4 of the KRAS and NRAS genes, codon 600 of the BRAF gene, and exons 10 and 21 of the PIK3CA gene, and showed a mutation in PIK3CA exon 10, namely the c.1624G>A, p.Glu542Lys (previously reported by our group 15).