26 , 27 Oct-4 expression was found to be associated significantly with tumor grade, stage, and size but Atlasi and colleagues found no association with these clinicopathological parameters, although a highly significant Oct-4 expression correlation was found between tumor and nontumor tissue samples. 20 In an another study, 81.6% of UBC tissue samples showed approximately 0.6% of Oct-4 positive cancer cells. 28 High Oct-4 expression was present in 64.1% of UBC cases, while Hafeti and colleagues observed 44% of hig
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