The SCG2 expression levels were higher in breast invasive carcinoma (BRCA), cholangiocarcinoma (CHOL), head and neck cancer (HNSC), kidney renal clear cell carcinoma (KIRC), kidney renal papillary cell carcinoma (KIRP), liver hepatocellular carcinoma (LIHC), lung squamous cell carcinoma (LUSC) compared with adjacent normal tissues. The gene discussed is SCG2; the disease is head and neck cancer.