1. Surgical Oncology Division, Hospital Napoleão Laureano, João Pessoa, PB, Brazil
2. General Surgery Division, Hospital das Clínicas at Federal University of Pernambuco (HC/UFPE), Recife, PE, Brazil
3. Medical School, Federal University of Pernambuco (UFPE), Recife, PE, Brazil
4. Pathology Division, Napoleão Laureano Hospital, João Pessoa, PB, Brazil