CHALLENGES IN THE ESOPHAGEAL CANCER STAGING IN BRAZIL - Yoshinari, Gerson Hiroshi; Dercy, Ary Fraga; Fernandes, Henrique Hott; Teixeira, Cesar Caldas; de Oliveria, Harley Francisco; Gomes, Gislene Amarães; Viana, Luciano Souza; Alvarenga, Mariana Paranhos (Brazilian Journal of Oncology, 2019)