Six 6 were excluded because they presented adenocarcinomas. Five of the six were in advanced stages while one 1 was in an early stage, classified as type I. Fourteen 14 patients were excluded because they were diagnosed with erythematous gastritis that could not be classified because of one or several low quality biopsies.
De la población a estudio se excluyeron veinte pacientes, seis por presentar adenocarcinoma de los cuales cinco en estado avanzado y uno en estadio temprano clasificado como tipo I y catorce pacientes por tener diagnóstico de gastritis eritematosa que no clasifica o por tener una o varias biopsias de mala calidad.