# Breaking Myths: Comparable Outcomes in Lymph Node Analysis Across Surgical Methods

## TL;DR

This study found that both laparoscopic and open surgeries recover similar numbers of lymph nodes in colon cancer patients, regardless of BMI.

## Contribution

The study demonstrates that surgical approach and BMI do not significantly affect lymph node retrieval when standardized techniques are used.

## Key findings

- Laparoscopic and open surgeries retrieved similar mean lymph node counts (15.89 vs. 15.98).
- BMI had no significant impact on lymph node recovery.
- Standardized surgical practices ensured consistent outcomes across methods.

## Abstract

Colorectal cancer is the third most common cancer globally, and lymph node recovery post-surgery is critical for treatment and prognosis. This retrospective study analyzed 560 colon cancer patients who underwent surgery between 2018 and 2023 to assess the impact of surgical approach and BMI on lymph node retrieval. The findings revealed no significant difference in the mean number of lymph nodes removed during laparoscopic (15.89 ± 0.84) versus open procedures (15.98 ± 0.50), with a p-value of 0.9166. Distribution analysis using violin plots confirmed overlapping patterns between the two surgical approaches, with no significant difference (p = 0.6270). Additionally, patient BMI did not significantly influence lymph node recovery. The consistency in outcomes is attributed to a standardized surgical team and fat clearance techniques, ensuring uniform results regardless of surgical method or BMI. These findings highlight the reliability of both surgical approaches in achieving comparable lymph node recovery, emphasizing the importance of standardized practices in colorectal cancer surgeries.

Background/Objectives: Colorectal cancer is the third most common cancer worldwide, making lymph node recovery critical for treatment decisions and prognosis. The relationship between body mass index (BMI) and the number of lymph nodes retrieved during laparoscopic and open surgeries remains controversial. This study aimed to evaluate whether surgical approach and BMI influence lymph node retrieval in colon cancer surgeries. Methods: A retrospective analysis was conducted on 560 patients who underwent colon cancer surgery at a single institution between 2018 and 2023. The average number of lymph nodes retrieved during laparoscopic and open procedures was compared. Distribution analysis using violin plots was performed to assess the pattern of lymph node yield between surgical approaches. Additionally, the impact of BMI on lymph node recovery was assessed. All surgeries were performed by a standardized surgical team using consistent fat clearance techniques. Results: The mean number of lymph nodes retrieved was 15.89 ± 0.84 for laparoscopic surgeries and 15.98 ± 0.50 for open surgeries, with no statistically significant difference (p = 0.9166). The violin plot analysis confirmed overlapping distributions between the two surgical approaches, with no significant difference (p = 0.6270). BMI also showed no significant effect on the number of lymph nodes removed during surgery. The consistency in outcomes was attributed to standardized surgical practices across all cases. Conclusions: Laparoscopic and open surgical approaches yield comparable lymph node recovery in colon cancer surgeries, both in terms of mean values and overall distribution patterns, regardless of patient BMI. These findings emphasize the importance of standardized surgical techniques in ensuring reliable outcomes and suggest that both approaches are equally effective in meeting oncological standards for lymph node retrieval.