Immunodetection of GRHL2 in precursor and cervical cancer tissues. Cervical tissues microarrays (including CIN 1, CIN 3, and CC biopsies) were used to detect GRHL2 by immunohistochemistry. An anti-GRHL2 antibody (HPA004820-Atlas antibodies) was utilized as the primary antibody. Representative images from each histological diagnosis are shown at a magnification of ×40 (A). GRHL2 expression was evaluated by the pathologist and classified according to the degree of positivity: negative, low, medium, or high. Percentages of the tissues found with the different grades of GRHL2 positivity are included (B). The biopsies evaluated for each pathological diagnosis (n) are also included.