Fig. 3From: PIK3CA mutation is a favorable prognostic factor in esophageal cancer: molecular profile by next-generation sequencing using surgically resected formalin-fixed, paraffin-embedded tissueFrequency of somatic mutations with base substitution in non/light smoker (n = 36) and smokers (n = 90). Frequencies of somatic mutations are shown for indicated genes in (a) non/light smokers (smoking status 0 + 1) and (b) smokers (smoking status 2 + 3). Deletions, insertions, and six types of point mutations are differentially shown by colorsBack to article page