TSPO and head and neck squamous cell carcinoma: To decipher which biological processes and pathways TSPO is involved in HNSCC, we performed pathway gene overlap analysis of genes strongly co-expressed with TSPO. The top 10 gene set overlaps for each gene set collection (CP : KEGG, Hallmark and GO : BP) of genes positively or negatively correlated with TSPO are shown in Figure 7.