It is considered that EMR should not be performed in undifferentiated lesions because of the risk of metastasis even in small lesions, nor should it be performed when there is signet ring cell carcinoma independent of the size of the lesion.
Se considera que no debe realizarse la REM en lesiones indiferenciadas riesgo de metástasis aun en lesiones pequeñas o células en anillo de sello independiente del tamaño de la lesión.