[Relative frequency of esophageal squamous carcinoma and adenocarcinoma in a series of endoscopic biopsies performed in Rosario, Argentina].

Objectives: To determine the relative frequency of adenocarcinoma and squamous carcinoma in a series of endoscopic biopsies of the esophagus registered in consecutive order in a pathology laboratory in the city of Rosario, Argentina, during two time periods: 1992-1999 and 2000-2006. To determine if the relative frequency of esophageal adenocarcinoma has increased over that of squamous carcinoma, in keeping with the trends noted in other Western countries.

Methods: We studied the endoscopic esophageal biopsies diagnosed with infiltrating adenocarcinoma and squamous carcinoma and Barrett's esophagus (BE) between 1992 and 2006.