In the 45 IMPA samples for IHC staining, there were 24 myoepithelial IMPAs, which were S100+SMA+Calponin+CK7−CK19− (Fig. 1) and 21 adenocarcinoma IMPAs, which were CK7+CK19+S100−SMA−Calponin− (Fig. 2). This evidence concerns the gene KRT7 and adenocarcinoma.