SOX9 and neoplasm: To further explore the relationship between SOX9 expression and cell growth in the tumor xenografts, paraffin sections of all tumor xenografts that were formed by SiHa-SOX9, SiHa-GFP, HeLa-shSOX9 and HeLa-shGFP cells were stained simultaneously with anti-Ki-67 and anti-SOX9 antibodies by immunohistochemistry.