Sanni and colleagues sought to evaluate N,N-diethyl-2-(2-(4-([18F]fluoro)phenyl)-5,7-dimethylpyrazolo[1,5-a]pyrimidin-3-yl)acetamide ([18F]F-DPA), another TSPO tracer, in head and neck squamous cell carcinoma (HNSCC) [55]. This evidence concerns the gene TSPO and head and neck squamous cell carcinoma.