As editor in chief of this book, I would like to acknowledge the efforts made by all of the contributing authors and the entire editorial team in the publishing of this book especially Ms Romina Skomersic for her very precious collaboration. Their dedication to the publication of the most contemporary and comprehensive scientific data has resulted with this excellent work. I would like to dedicate this book to all my colleagues - surgeons, pathologists, oncologists, radiologists and anethesists at Sahloul hospital. I also dedicate it especially to Professor Ridha Ben Hadj Hamida, surgeon at the department of surgery in Sousse
