Fig. 1.

Nuclear β-catenin staining was present in the majority of sinonasal HPC. β-catenin expression was most frequently moderate-to-strong and multifocal or diffuse (a H&E, b β-catenin). SFT showed consistent nuclear β-catenin expression, although staining intensity and extent were more variable, ranging from focal to multifocal in extent and weak to strong in intensity (c H&E, d β-catenin). Frequent nuclear β-catenin was observed in synovial sarcomas; β-catenin expression ranged from focal and weak to strong and multifocal in staining (e H&E, f β-catenin). No nuclear β-catenin expression was observed myopericytoma (g H&E, h β-catenin)