To establish the value of clinical factors in the prediction of perioperative complications and death in patients with oral and oropharyngeal carcinomas and to develop a new extended clinical severity staging system that combines patient and tumor factors.
Department of Head and Neck Surgery and Otorhinolaryngology, Centro de Tratamento e Pesquisa Hospital do Câncer A. C. Camargo, R. Professor Antônio Pudente, 211, CEP 01509-010 São Paulo-SP, Brazil. lp_kowalski@uol.com.br