CHROMOENDOSCOPY USING TOLUIDINE BLUE PLUS LUGOL'S SOLUTION FOR EARLY DIAGNOSIS OF ESOPHAGEAL PREMALIGNANT LESIONS AND SUPERFICIAL NEOPLASMS IN HIGH-RISK PATIENTS.

Background: Esophageal cancer is the eighth most common cancer. The prognosis is bleak in patients with advanced stages. Patients with early disease have a better prognosis than those with advanced stage.