POPDC3 and squamous cell lung carcinoma: IHC analysis of POPDC3 was conducted on two NSCLC tissue microarrays (TMAs), comprising 90 samples of lung adenocarcinoma (LUAD) (Fig. 7A, B) and 90 samples of lung squamous cell carcinoma (LUSC) (Fig. 7C, D), along with corresponding adjacent non-cancerous tissue samples.