In addition, the frequency of PinX1 gene deletion in adenocarcinoma was more than squamous carcinoma in some solid tumors, such as 6.1% (TCGA, Nature), 5.5% (Broad, Cell), and 5.7% (TCGA, Provisional) in lung adenocarcinoma versus 1.7% (TCGA, Provisional) in lung squamous cell carcinoma. This evidence concerns the gene PINX1 and squamous cell lung carcinoma.