Fig. 2
![Fig. 2](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs12967-022-03869-8/MediaObjects/12967_2022_3869_Fig2_HTML.png)
A CNV frequency of HRGs in TCGA-HNSCC cohort. B The mutation frequency of 49 HRGs in 433 patients with HNSCC from TCGA-HNSCC cohort. C The location of CNV alterations of HRGs on different chromosomes. D The expression of different HRGs between normal and tumor tissues (nsP > 0.05, *P < 0.05, **P < 0.01, ***P < 0.001). CNV copy number variation, HNSCC head and neck squamous cell carcinoma, NS not significant