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Quality-of-life assessment is becoming an important concern even of surgeons. The new trend applies specifically to surgical oncology, where particular attention is now being paid to the outcome of surgical treatment. Gastrointestinal cancers are heterogeneous in their presentation and in treatment, but they share common aspects related to the surgical approach. A functional outcome is fundamental in all the operations performed for gastrointestinal cancers and many improvements have been made thanks to the increased rate of conservative approaches and the amelioration of the technology applied to surgery. The measurement of the surgical outcome and the methods to be applied is still undergoing extensive evaluation but the flourishing interest in the issues concerning quality of life all over the surgical community will rapidly lead to a better definition of goals and results.