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Abstract
The right and left side of the colon derived from the midgut and hindgut, respectively. Previous studies have reported different characteristics of right-sided colon cancer (RCC) and left-sided colon cancer (LCC), but oncological outcomes remain unclear. This study compared the outcomes of RCC and LCC. This retrospective study included 1017 patients who received curative colectomy for stage I-III colon cancer at a single institute between August 2008 and December 2019. Overall survival (OS) and time to recurrence (TTR) were analyzed as outcome measurements. No significant difference in the OS or TTR of patients with RCC and LCC were observed. In subgroup analysis, RCC was associated with shorter TTR than LCC in stage II colon cancer (HR 2.36, 95% confidence interval 1.24–4.48, p < 0.01). Multivariate analysis demonstrated that right sidedness, R1 resection, low body mass index (BMI) and adjuvant chemotherapy were independent factors for poor prognosis for stage II colon cancer. Low BMI, perineural invasion, higher T stage and N2 stage were independent factors for poor prognosis for stage III colon cancer. The results were confirmed by multivariate analysis after propensity score matching. Our study revealed that RCC was an independent risk factor for recurrence in stage II colon cancer.
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Details
1 Taipei Medical University Shuang-Ho Hospital, Department of Surgery, New Taipei City, Taiwan (GRID:grid.412955.e) (ISNI:0000 0004 0419 7197)
2 Taipei Medical University Shuang-Ho Hospital, Division of Colorectal Surgery, Department of Surgery, New Taipei City, Taiwan (GRID:grid.412955.e) (ISNI:0000 0004 0419 7197)
3 Taipei Medical University Shuang-Ho Hospital, Division of Colorectal Surgery, Department of Surgery, New Taipei City, Taiwan (GRID:grid.412955.e) (ISNI:0000 0004 0419 7197); Taipei Medical University, Department of Surgery, School of Medicine, College of Medicine, New Taipei City, Taiwan (GRID:grid.412896.0) (ISNI:0000 0000 9337 0481)