The great contributions which have been responsible for the present knowledge of lesions of the stomach and of the duodenum have been the facts disclosed by surgical treatment of these lesions during the life of the patient, the development of roentgenology, which shows by indirect means the site and character of these lesions, and the development of the flexible gastroscope. The development of endoscopy has been a spectacular feature of modern diagnostic methods, and those instruments which have for their purpose the visualization of cavities of the body are some of the most ingenious and useful examples of the instrument maker's art. It was inevitable in all this development that some satisfactory means should be devised for visualizing the interior of the stomach. For many years physicians had to be content with an inadequate, rigid instrument, but the flexible gastroscope has opened a new field and has proved that it
BALFOUR DC. THE PLACE OF THE GASTROSCOPE IN THE DIAGNOSIS OF LESIONS OF THE STOMACH AND OF THE DUODENUM. Arch Surg. 1940;41(2):221–225. doi:10.1001/archsurg.1940.01210020017003
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