Background: Surgical standardization for transverse colon cancers (TCC) has not been established, and the oncologic benefit of central vessel ligation (CVL) are still unclear. This study aimed to evaluate the oncologic safety of TCC surgery without CVL of the middle colic artery (MCA).
Methods: This is a single-center, retrospective, observational, comparative study. The clinical, surgical, and pathological characteristics of the patients who underwent radical surgery for non-metastatic TCC between January 2012 and December 2020 were investigated, and the characteristic and oncologic outcomes of No CVL and CVL groups were compared.
Results: The number of No CVL and CVL groups was 47 (44.3%) and 59 (55.7%), respectively. There was no statistically significant difference between the two groups in surgical complications, stage, mean number of retrieved lymph nodes (LN) (24.12 vs. 22.36 p = 0.464), mean number of metastatic LN (1.53 vs. 0.74, p = 0.163), mean proximal margin (19.2 cm vs. 16.7 cm, p = 0.139), mean distal margin (9.6 cm vs. 9.9 cm, p = 0.753), adjuvant chemotherapy, total recurrence rate (6.4 vs. 11.9%, p = 0.507), lymphatic recurrence rate (0.0% vs. 5.1%, p = 0.253), and local recurrence rate (2.1 vs. 1.7%, p = 0.984). Furthermore, there was no statistically significant difference of 5-year disease-free survival (DFS) and overall survival (OS) in stage II (DFS: 94.4 vs. 91.3%, p = 0.685, OS: 94.1 vs. 95.5%, p = 0.838) and stage III (DFS: 88.5 vs. 68.4%, p = 0.253, OS: 100.0% vs. 79.7, p = 0.328).
Conclusion: TCC surgery without CVL of the MCA showed comparable surgical and oncologic outcomes compared to surgery with CVL. Therefore, preservation of a branch of the MCA may be considered a safe option, when combined with adequate lymph node dissection, if necessary. A large, prospective, and controlled study will be necessary to provide solid evidence of the oncologic safety of this procedure.
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