How to start and develop a multicenter, prospective, randomized, controlled trial Xavier Serra Aracil; Oriol Pino Pérez;

Local resection in rectal cancer: When, who and how? Jesus Badia-Closa; Juan Pablo Campana; Gustavo Leandro Rossi; Xavier Serra-Aracil;

Excision of a large adenovillous lesion (four quadrants) with peritoneal perforation via Transanal Endoscopic Operation (TEO). Step-by-step surgical strategy Xavier Serra-Aracil; Jesus Badia-Closa;