Objective To investigate the correlation between patient' s age and expression of Ki-67 or microvessel density in primary hepatocellular carcinoma.Methods The expression level of Ki-67 and the microvessel density in the hepatocellular carcinoma tissues were detected by immunohistochemical method,and the correlation between age and expression of Ki-67 or microvessel density were analyzed.Results In 48 cases of hepatocellular carcinoma tissues,Ki-67 expressed to varying degrees,but the positive rate was 83.3 ％ (40/45),and there was no expression in corresponding noncancerous tissues (P ＜ 0.01).Microvessel density marked by CD34 in cancer tissues and noncancerous tissues were 32.17±8.06 and 10.83±2.85 respectively.Microvessel density of cancer tissues was higher than noncancerous tissues (P ＜ 0.01).Both levels of Ki-67 expression and microvessel density in hepatocellular carcinoma were negatively correlated with the age (r =-0.418,P =0.003 and r =-0.443,P =0.002 respectively).Conclusion Both levels of Ki-67 expression and microvessel density in hepatocellular carcinoma are negatively correlated with patient' s age,which may suggest worse prognosis for the younger patients.

Objective To investigate the expression and significance of Insulin like growth factor-ⅡmRNA binding protein3 (IMP3) in gastrointestinal stromal tumors (GIST). Methods One hundred and fifteen cases of GIST were subjected to immunohistochemical staining for IMP3 (SP method) and ki67 (iVisionTM method ). The relationship between IMP3 expression with clinicopathologic parameters and Ki67 proliferation indexes were analyzed. In situ hybridization detection of IMP3 mRNA was performed in 20 cases of GIST positive. Results The expression rate of IMP3 was 56.2%(65/115) in GIST positive. A significant correlation can be found between IMP3 expression and tumor of infiltration , coagulative necrosis , metastasis , nuclear atypia , diameter , mitotic count , risk grade of NIH (P < 0.05), while there was no significant correlation between IMP3 and gender, age, primary location, categories of cell type (P>0.05). There was positive correlation of IMP3 expression and Ki67 labeling indexes by Spearman analysis. Positive expression with IMP3 can be observed in 3 cases of recurrence.It may play important role in invasive and development and may be an important factor of prognosis in GIST.