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Fig. 3 | BMC Cancer

Fig. 3

From: Association of levels of metabolites with the safe margin of rectal cancer surgery: a metabolomics study

Fig. 3

Hierarchical clustering analysis and ROC curves of metabolome data for metabolites in the 50 samples of tumor tissue and 5 cm from tumor (normal tissue). a Hierarchical clustering analysis in positive ion mode. c Hierarchical clustering analysis in negative ion mode. b ROC curves of the metabolites in the positive ion mode. d ROC curves of the metabolites in the negative ion mode. Metabolite levels were used to color code individual samples from blue (low concentration) to purple (high concentration). Tree clusters and shorter Euclidean distances indicate greater similarities between samples or metabolites. The red color of the top bars represents the tumor tissue, and the green color of the top bars represents the normal tissue. ROC, receiver operating characteristic

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