Additionally, the deltaNp63 protein, which is a typical squamous/basal marker, was strongly expressed, and the PBRM1 protein expression was significantly lower in resected pancreatic squamous cell carcinoma and adenosquamous carcinoma specimens than in well- or moderately differentiated PDAC specimens (Figure 1, I and J). Here, PBRM1 is linked to adenosquamous carcinoma.