Adequate lymphadenectomy for colorectal cancer: a comparative analysis between open and laparoscopic surgery

Open Versus Laparoscopic Oncological Resections for Colon Cancer: An Experience at an Average-Volume Center

Although laparoscopy has some limitations related to tumor size or location along the colon, it has been demonstrated that the oncological results are just as good as for open surgery. One can also add to the benefits faster recovery and start of chemotherapy, with lower rates of complications. Our study aimed to compare open surgery to laparoscopy for non-complicated colon tumors operated in an average case-load center and appreciate its feasibility with regards to the T stage, lymph node yield and conversions. The study is retrospective and expanded over four years (January 2020-January 2024). One hundred sixty-two patients were included in the study. We observed that female patients were frequently operated through laparoscopy (p=0.003). T1 and T2 tumors represented the majority of the tumors in the laparoscopy group (p=0.004). No statistical difference existed in terms of lymph node yield. Laparoscopy was avoided for tumors of the splenic angle (p=0.006). Concluding our results, minimally invasive surgery for non-complicated colon cancer is non-inferior to open surgery. Considerable expertise is required to take on more complex cases such as difficult-to-access tumors or large, invasive cancers. It can and should be offered to patients as an alternative to open surgery.

Evaluation of lymph node adequacy in patients with colorectal cancer: Results from a referral center in Iran

Background

The presence of lymph node metastasis is one of the most important prognostic factors for long-term survival of patients with colorectal cancer. Therefore, thorough pathologic examination of at least 12 lymph nodes is essential for accurate staging of this disease, as well as for choosing the best adjuvant treatment. The aim of this study is to assess the adequacy of lymph node harvest in patients with colorectal cancer.

Methods

This observational, cross-sectional study was performed on 584 patients with colorectal adenocarcinoma who had undergone surgery from 2012 to 2017. Thereafter, the relevant demographic, pathological, and surgical data were extracted from the patients' medical records; and a relationship between the number of evaluated lymph nodes and other variables was also assessed.

Results

Among 584 studies cases in this study, 336 (57.5%) subjects had fewer than 12 evaluated lymph nodes. Mean and median number of the evaluated lymph nodes were calculated as 10.7 (±5.6) and 10, respectively. The patients aged 60 years old and older and the cases with tumors located in descending colon and rectum were observed to have a higher likelihood of inadequate lymph node retrieval. After an average follow-up of a 60-month period, 63% of the patients were alive. For the patients in whom fewer than 12 lymph nodes had been assessed, the median survival was estimated to be 48 months. For the patients in whom the number of evaluated lymph nodes was ≥12, median survival was calculated to be 54 months.

Conclusion

The number of lymph nodes evaluated in our study was less than the standard number in more than half of the patients. Among various other factors, older age and tumor location in descending colon and rectum are found to be associated with suboptimal assessment of lymph nodes. The number of lymph nodes dissected is also associated with survival.