PIK3CA and melanoma: All patients were tested with Sequenom (32 WT (Wild-Type), 44 BRAF-mutated, 27 NRAS-mutated, 1 KRAS-mutated and 1 PIK3CA-mutated), among these 4 out of 6 acral melanomas (4 WT, 1 NRAS-mutated and 1 BRAF-mutated) were also tested for KIT mutations: only 1 out of 4 WT lesions carried a D816H KIT mutation.