CD133 immunoreaction in primary ovarian cancer. A) Negative control; B) Representative example of CD133 positive immunoreaction in the cytoplasm of solidly arranged tumor cells; C, D) Representative examples of CD133 positive staining at the apical/endoluminal portion of tumor cells. Magnification = 100× (A, B, C); 200× (D).
Ferrandina et al. BMC Cancer 2009 9:221 doi:10.1186/1471-2407-9-221