High expression of squamous cell carcinoma antigen in poorly differentiated adenocarcinoma of the stomach: A case report

Figure 5 Immunohistochemical staining for squamous cell carcinoma antigen in gastritis and gastric cancer tissues. Paraffin-sections from gastritis and gastric cancer tissues of multiple patients were simultaneously stained for squamous cell carcinoma antigen (SCCA). A: Negative SCCA expression (-) in well differentiated gastric cancer (200 × magnification); B: Weakly positive SCCA expression (+) in poorly differentiated gastric cancer (200 × magnification); C: Negative SCCA expression (-) in chronic gastritis (200 × magnification); D: Strong SCCA expression (+++) in gastric squamous cell carcinoma (200 × magnification).