Fig. 2

Representative images of SOX17 immunohistochemical staining in both ARID1A-negative OCCC tissue specimens (a and c) and ARID1A-positive OCCC tissue specimens (b and d). Little or no ARID1A immunoreactivity was found in a, while robust ARID1A immunoreactivity was found in c. Immunohistochemical staining demonstrated that SOX17 immunoreactivity was found in both ARID1A-negative tissue specimens (b) and ARID1A-positive tissue specimens (d). Blue and black arrows indicate SOX17-negative and -positive OCCC cells, respectively. Arrows indicate 100 μm