SINCE the introduction of the Benedict flexible operating gastroscope in 1948,1 203 biopsies of the stomach have been taken by this means in the Massachusetts General Hospital Endoscopy Clinic. No accidents and no complications have resulted. As already reported,2 3 4 5 the advantages of this instrument are: biopsy of the stomach under direct vision, aspiration of gastric secretions and inflation and deflation of the stomach at will.It seems hardly necessary to point out the importance of gastroscopic biopsy in the differentiation of benign and malignant lesions of the stomach. In all other endoscopies biopsy is practiced routinely, and its advantages are . . .