The subexpression of OGN in RSCCs was also observed when analyzed at the protein level: Immunohistochemistry showing staining in both absorptive cells and in the stroma, with no staining detected in tumor tissue, the analysis of the differences in the images being statistically significant (p < 0.001, Wilcoxon test, Figure 2C,D). The gene discussed is OGN; the disease is neoplasm.