Immunophenotype of SSH and non-ITAC using markers of seromucinous differentiation. a SSH (H&E, ×40) showing b S100 positivity in serous acini (×100), c DOG1 apical luminal staining mainly in serous acini (×100), and d SOX10 expression in all acini (×100). e Intermediate grade tubulopapillary non-ITAC (H&E, ×40) showing f focal S100 positivity (×100), g weak DOG1 apical luminal staining (×100), and h SOX10 positivity (×100)