Fig. 4From: Systematic identification of key functional modules and genes in esophageal cancerModule preservation evaluation and PCA. a MedianRank score of different modules. The lower score, the more preservation value. b Zsummary score of different modules. The higher score, the more preservation value. c Eigengene adjacency heatmap. d The genes in the purple module were shown the degree of overlapping between samples in each of the normal and tumour by using PCABack to article page