Comparison of the number of retrieved lymph nodes in colorectal cancer resection specimens between conventional and laparoscopic surgery

摘要

> face="Verdana" size="2"> Introduction: pathology staging with the analysis of the number of retrieved lymph nodes is an important factor in oncologic safety of colorectal cancer resections, in conventional and laparoscopic surgery. In the beginning of a learning curve in laparoscopy, equivalence between these two types of approaches can be compromised. The purpose of this study was to evaluate the number of retrieved lymph nodes in colorectal cancer resection specimens between conventional and laparoscopic surgery, and verify oncological equivalence between these techniques. Method: retrospective analysis of a case series of colorectal cancer specimens operated with conventional and laparoscopic surgery. Age, gender, type of operation, approach, staging and number of retrieved lymph nodes were analyzed. Statistical analysis with Mann-Whitney method was performed. Results: 50 patients were operated in the study period (33 with conventional and 17 with laparoscopic approach). Right hemicolectomy and high rectosigmoid resection were the most common procedures performed. The mean number of retrieved lymph nodes was 10,35 in the laparoscopy group and 10,15 in the conventional approach (p=0,859). Conclusions: there was no statistical difference between the number of retrieved lymph nodes in colorectal cancer resection specimens between laparoscopic and conventional approach, in the beginning of a learning curve in laparoscopy.