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To evaluate the short-term oncologic outcomes of curative resection for left-sided colon cancer obstruction following by stent insertionBetween March 2005 and July 2008, 722 patients underwent surgical resection for colorectal cancer at St. Mary's Hospital, Kangnam. We include stage II, III left-sided colon cancer patients who underwent curative resection. The clinicopathologic variables and survival rate were compared between three groups. The median follow-up period was 25 months.In our study, T stage was statistically different between the NO and PO + S group (P = 0.037). And neural invasion was statistically different between the PO and S group (P = 0.048). Overall survival rate of between three group showed no statistically significant differences (NO vs PO + S; P = 0.191, NO vs S; P = 0.110, PO vs S; P = 0.478). Disease free survival rates also showed no differences between three groups (NO vs PO + S; P = 0.352, NO vs S; P = 0.094, PO vs S; P = 0.182).Stent insertion itself does not compromised the survival of patients with obstructive left-sided colon cancer. A further large-scaledprospective study and long term follow up is necessary to evaluate the oncologic safety of stent insertion.