Fig. 1
![Fig. 1](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs13018-021-02464-9/MediaObjects/13018_2021_2464_Fig1_HTML.png)
Heat map of top 50 DEGs in ONFH. a Heat map of top 50 DEGs in GSE123568. b Heat map of top 50 DEGs in GSE74089 (tissue samples are presented as columns; individual genes are presented as rows. Red represents upregulated genes; green indicates downregulated genes in patients with ONFH. The patients in the top rows in pink indicate the control columns; the patients in the top rows in blue indicate columns were patients with NFH. DEGs, differentially expressed genes; NFH, necrosis of the femoral head)