Expression of GASC1 in invasive breast carcinoma of ductal type. (A) Positive immunostaining in nuclei of epithelial cells (arrows; immunoscores: 3 for the nuclear number and 3 for intensity of nuclear staining), positive staining visible in cytoplasm was not taken into account. Original magnification of x200. (B) Negative GASC1 immunostaining in nuclei of epithelial carcinoma cells. Original magnification of x200.