There is still significant debate regarding the best surgical treatment for malignant left-sided large bowel obstruction. Primary resection and anastomosis offers the advantages of a definite procedure without need for further surgery. Its main disadvantages are related to the increased technical challenge and to the potential higher risk of anastomotic leakage that occurs in the emergency setting. Primary resection with end colostomy (Hartmann's procedure) is considered the safer option. Tan et al compared in a systematic review and meta-analysis the use of self-expanding metallic stents (SEMS) as a bridge to surgery vs emergency surgery in the management of acute malignant left-sided large bowel obstruction. The authors concluded that the technical and clinical success rates for stenting were lower than expected. SEMS was associated with a high incidence of clinical and silent perforation. Stenting instead of loop colostomy can be recommended only if the appropriate expertise is available in the hospital. The goal of stenting, a decrease of the stoma rate, may be advocated only if the complication rates of stenting are lower than those of stoma creation in the emergency situation. Until now, this was not demonstrated in a prospective randomized trial.
COMMENTARY ON HOT TOPICSThere is still significant debate regarding the best surgical treatment for malignant left-sided large bowel obstruction. In a multicenter German observation study, out of 15 911 patients with cancer of the left colon a total of 743 patients (4.7%) underwent emergency surgery, performed as a radical resection. In 57.9% (n = 430) a one-stage operation, in 11.7% (n = 87) a primary anastomosis with protective stoma, and in 30.4% (n = 226) Hartmann's procedure (HP) were performed [1] . The morbidity and hospital mortality rates (overall hospital mortality, 7.7%, n = 57) did not differ significantly between the groups. With comparable mortality, HP was recommended for high risk patients in the emergency situation. On the basis of a literature search, Trompetas [2] came to a similar conclusion: primary resection with end colostomy (HP) is considered the safest option in malignant left-sided colonic obstruction. The main advantages are that there is no risk of anastomotic dehiscence and the operation can be performed by less experienced and non-specialist surgeons. The main disadvantages of HP are the need for a second major operation to reverse the colostomy, and the fact that 40%-60% of patients do