直肠癌神经周围浸润的临床研究

目的 探讨直肠癌神经周嗣浸润（PNI）的临床意义.方法 回顾性分析郴州市第一人民医院2003年1月至2005年1月间行直肠前切除低位吻合术（Dixon）的204例直肠癌患者的临床资料,标本常规石蜡切片后行苏木精-伊红染色,以肿瘤细胞浸润神经束或神经束膜判定为PNI阳性.分析PNI与直肠癌临床病理特征和预后的关系.结果 204例直肠癌患者中PIN阳性65例（31.9%）.PNI与肿瘤大小、浸润深度、淋巴结转移、TNM分期、肿瘤生长方式、分化程度、肿瘤切除情况有关（P＜0.05）.PNI阳性组患者术后生存时间为（43.8±1.5）个月,明显短于PNI阴性组的（57.2±1.5）个月（P＜0.01）.PNI阳性的Ⅱ期患者术后平均生存时间为（46.5±3.2）个月,显著低于Ⅲ期患者的（55.7±1.2）个月（P＜0.05）.结论 PNI可作为直肠癌的预后判断指标.

Clinical study of perineural invasion in patients with rectal cancer

Objective To investigate the clinical significance of perineural invasion (PNI) in rectal cancer. Methods Clinical data of 204 patients undergoing resection of low rectal cancer from January 2003 to January 2005 at the First People's Hospital of Chenzhou were analyzed retrospectively.Paraffin sections of surgical specimens from all the patients who underwent resection of low rectal cancer were stained with HE. PNI-positive was defined as infiltration of carcinoma cell into the perineurium or neural fascia. The association of PNI with clinicopathologic features and prognosis of rectal cancer was analyzed. Results PNI was positive in 31.9% (65/204) of the patients. The tumor size, depth of invasion, lymph node metastasis, TNM stage, tumor growth pattern, histologic grade, tumor resection were significantly associated with PNI. The overall survival time of the PNI-positive patients was shorter than that of the PNI-negative patients [(43.8±1.5) months vs.(57.2±1.5) months, P＜0.01].Furthermore, the overall survival time of the PNI-positive stage Ⅱ patients was shorter than that of the stageⅢ patients [(46.5±3.2) months vs. (55.7±1.2) months, P＜0.05]. Conclusion PNI can be used as one of the indicators to predict the prognosis of patients with rectal cancer.