1. Division of Colorectal Surgery; Alfa Institute of Gastroenterology at University Hospital; Belo Horizonte Brazil
2. Department of Surgery; Federal University of Minas Gerais Medical School; Belo Horizonte Brazil
3. Division of Surgical Pathology; Alfa Institute of Gastroenterology at University Hospital; Belo Horizonte Brazil
4. Department of Pathology; Federal University of Minas Gerais Medical School; Belo Horizonte Brazil