A Pasquer1, F Djeudji2, A Pechoux2, X Barth2,3. 1. Department of Digestive and Colorectal Surgery, Edouard Herriot University Hospital, 5 Place d'Arsonval, 69003, Lyon, France. arnaud.pasquer@chu-lyon.fr. 2. Department of Digestive and Colorectal Surgery, Edouard Herriot University Hospital, 5 Place d'Arsonval, 69003, Lyon, France. 3. University Claude Bernard Lyon I, Lyon, France.