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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.

Frecuencia relativa de carcinoma escamoso y adenocarcinoma esofágicos en una serie de biopsias endoscópicas realizadas en Rosario, Argentina