Objective:To investigate the relationship of the expression of VEGF-C and the metastasis of the lymphoid nodes in laryngeal cancer.Methods:Using immunohistochemistry method, the expression of VEGF-C in the tumor tissues and the density of lymphatic in adjacent tissue of laryngeal carcinoma were detected.Results:The expression of VEGF-C in laryngeal carcinoma was higher than in vocal cord polyp and in lymphoid node-positive was higher than in node-negative. Density of lymphatic capillary in adjacent tissue of laryngeal carcinoma was much higher than in normal laryngeal tissue and in lymphoid node-positive was higher than in node-negative.Conclusion:VEGF-C protein expression is close to lymphatic metastasis.

Objective:To explore the relationship among physical exercise, self-control, and mobile phone dependence in adolescents.Methods:The entire group of random sampling method was used to extract 882 students from five junior high schools in Nanchang city from September 2020 to March 2021.A longitudinal survey was conducted using the sports activity rating scale, self control scale, and adolescent mobile phone dependence scale on all participants for 2 times with an interval for 6 months.The questionnaire results in the first stage were marked as T1.The questionnaire results in the second stage were marked as T2.SPSS 26.0 statistical software was used to conduct reliability analysis, common method bias test and Pearson correlation analysis on each variable in sequence.AMOS 23.0 was used for cross-lag analysis to explore the relationship among physical exercise, self-control and mobile phone dependence.Results:The score of physical exercise of adolescents was (17.71±5.62), the score of self-control was (51.48±9.71), and the score of mobile phone dependencies was (56.67±12.93). Adolescent physical exercise, self-control, and mobile phone dependence were all related to stability across time.There were positive correlation between T1 physical exercise and T2 physical exercise ( r=0.489), T1 self-control and T2 self-control ( r=0.482), as well as T1 mobile phone dependencies and T2 mobile phone dependencies ( r=0.498)(all P<0.01). Cross-lag analysis showed that: adolescent physical exercise behavior could unidirectionally predict self-control( β=0.197, P<0.01)and mobile phone dependence( β=-0.224, P<0.01) after 6 months, and self-control could predict the mobile phone dependence( β=-0.560, P<0.01) of junior high school students after 6 months.The mediating effect results showed that self-control had a mediating effect between physical exercise and mobile phone dependence of junior high school students, there were gender differences.The mediating effect accounted for 22.22%(-0.018/-0.081). Conclusion:Physical exercise can indirectly reduce the mobile phone dependence of junior high school students by affecting self-control.