PPP2R1A and hepatocellular carcinoma: This analysis revealed consistent and statistically significant positive correlations between PPP2R1A expression and cancer-associated fibroblast (CAF) infiltration in multiple tumor types, including: head and neck squamous cell carcinoma, hepatocellular carcinoma, lung adenocarcinoma, malignant mesothelioma, and other tumor types (Figure 8A).