Abstract： Objective To investigate the expression and correlation of phosphatase and tensin homologue deleted on chromosome ten(PTEN)， epidermal growth factor receptor(EGFR) and Ki-67 in human thymic tumors, and their possible role in tumor genesis， infiltration and metastasis. Methods The expression of PTEN， EGFR and Ki-67 were detected by using SP immunohistochemical technique in 45 cases of thymic tumors and 5 cases of normal thymic tissues. Results In 5 cases of normal thymic tissues, the expression of PTEN was bly positive, whereas EGFR and Ki -67 were weakly positive or negative. In 45 cases of thymic tumors, the positive ratio of PTEN were significantly reduced from benign thymoma， invasive thymoma to thymic carcinoma (χ2=7.808, P=0.020), but the positive ratio of EGFR and Ki-67 were gradually increased(χ2=8.032, 0.018，7.006；P=0.030). The positive ratio of PTEN， EGFR and Ki-67 protein were significantly related to Levine classification, Masaoka staging and lymph node metastasis (Plt;0.05). PTEN positive cases were negatively correlated with EGFR and Ki-67(r=－0.632，－0.653；Plt;0.01), EGFR positive cases were positively correlated with Ki-67 in thymic tumors(r=0.807,Plt;0.01). Conclusions Reduced or absent PTEN and increased EGFR and Ki-67 expression might play an important role in the genesis， invasiveness and metastasis of thymic tumors. The expression of PTEN is bly associated with the expression of abnormal EGFR and Ki-67. Detection of the three protein expressions simultaneously might be more helpful in making an early diagnosis of the tumors jndgement of theirs malignant degree，invasiveness and metastasis capacity, as well as the prognosis.
目的探讨胸中上段食管癌淋巴结清扫的合理范围。 方法回顾性分析2010年1月至2013年10月我院134例胸中上段食管癌淋巴结清扫患者的临床资料。将患者分为两组：三野组，56例，男50例、女6例，年龄（55.4±9.6）岁，行三野淋巴结清扫根治术；二野组，78例，男69例、女9例，年龄（56.3±7.3）岁，行完全二野淋巴结清扫根治术。比较两组临床效果。 结果三野组患者淋巴结转移率明显高于二野组（60.7%vs.42.3%，P < 0.05），主要差别在于三野组有较高的颈部淋巴结转移率（21.4%）。三野组与二野组患者上纵隔淋巴结转移率分别为33.9%和30.8%，差异无统计学意义（P>0.05）。三野组及二野组患者术后并发症发生率差异无统计学意义（P>0.05）。三野组及二野组患者术后１年生存率分别为96.3%和85.5%，差异有统计学意义（P < 0.05）；三野组及二野组患者术后1年内颈部淋巴结复发率分别为1.9%和11.8%，差异有统计学意义（P < 0.05）。 结论三野淋巴结清扫根治术有助于提高胸中上段食管癌手术根治性，能减少术后局部复发和转移，提高患者术后生存率，相对于完全二野淋巴结清扫术并不显著增加手术并发症。