Fig. 4

Progression-free survival for patients with exon 19 deletion according to different subtype classifications (n = 25). a Classification with deletion starting codon (n = 25). A patient with the starting codon S752 was excluded because of only one patient was in this subgroup. Any patients with the starting codon L747 did not experience disease progression at the data cut-off date. b Classification with the number of deleted nucleotides (n = 25). Other/mixed insertion/substitution subgroup includes microdeletion (24n-del) and insertion/substitution. A patient with 18 nucleotide deletion was excluded because of only one patient was in this subgroup. *Other/mixed ins/sub: other/mixed insertion/substitution subgroup