Abstract
Objective To investigate the expression of Ki-67 in bladder transitional cell carcinoma and its relationship with grade and stage. Methods Immunohistochemistry method were used to detect the expression of Ki-67 in bladder transitional cell carcinoma and control groups. Results The positive expression rate of Ki-67 antigen in 60 cases of bladder cancer, 20 cases of benign bladder disease and 10 cases normal bladder mucosa were 25.9 %, 10.3 % and 1.1 %. There were significantly difference among each group. The more grade and stage, the greater expression of Ki-67 antigen. Conclusion Ki-67 antigen is related to cell proliferation. The expression of the Ki-67 antigen in bladder cancer is closely related to the grade extent of tumor, and it is an important cell proliferation indicator. As a signal, Ki-67 antigen reflects cell proliferation, measurement of the expression of the Ki-67 antigen could reflect the condition of tumor cell proliferation. It might be an important prognostic factor for judging the occurrence, development and prognosis of the tumor. Key words: Urinary bladder neoplasms; Immunohistochemistry; Ki-67 antigen
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