Objective To explore the expression of serine/threonine kinase- 15( STK15) and its function in differentiated thyroid cancer tissues. Methods Immunohistochemical method was used to detect the expression of STK15 gene in 71 cases of differentiated thyroid carcinoma and pericarcinomatous tissues,and in 45 cases of nodular goiter tissues. Results The positive expression rates of STK15 gene were 100%,8. 5%,24. 4% in 71 cases of papillary thyroid carcinoma tissues,pericarcinomatous tissues,and nodular goiter tis...