Janssen-Heijnen ML, van der Heijden LH et al. Comorbidity and colorectal cancer according to subsite and stage: A population-based study. Eur J Cancer 2000;36:95-99. 3. Scott NA, Jeacock J, Kingston RD. Risk factors in patients presenting as an emergency with colorectal cancer. Br J Surg 1995;82:321-323. 4. Martinez-Santos C, Lobato RF, Fradejas JM et al. Self-expandable stent before elective surgery vs. emergency surgery for the treatment of malignant colorectal obstructions: Comparison of primary anastomosis and morbidity rates. Dis Colon Rectum 2002;45:401-406. 5. Saida Y, Sumiyama Y, Nagao J et al. Long-term prognosis of preoperative "bridge to surgery" expandable metallic stent insertion for obstructive colorectal cancer: Comparison with emergency operation. Dis Colon Rectum 2003;46:S44-S49. 6. Sebastian S, Johnston S, Geoghegan T et al. Pooled analysis of the efficacy and safety of self-expanding metal stenting in malignant colorectal obstruction. Am 51:15-36. 8. Surgery for colorectal cancer in elderly patients: A systematic review. Colorectal Cancer Collaborative Group. Lancet 2000;356:968-974. 9. Spivak H, Maele DV, Friedman I et al. Colorectal surgery in octogenarians. J Am Coll Surg 1996;183:46-50. 10. Tan CJ, Dasari BV, Gardiner K. Systematic review and meta-analysis of randomized clinical trials of self-expanding metallic stents as a bridge to surgery versus emergency surgery for malignant left-sided large bowel obstruction. Br J Surg 2012;99:469-476.