Literature is replete with articles on the subject of diaphragmatic hernia, giving minute details as to its embryologic anatomy and differential diagnosis. Richards 1 recently discussed it from the point of view of embryology, and Morrison,2 from that of the differential diagnosis. I shall refrain from discussing these points. and take up the subject principally from the roentgenologic point of view.
Several years ago, my associate, Dr. T. R. Healy, and I made a careful roentgen-ray study of the fundus of the stomach, hoping to determine some method whereby malignancy could be earlier diagnosed. My attention was attracted to the varying shapes of the fundus in the upright, prone, supine, lateral and oblique positions, when filled with the barium meal. The position of the esophageal opening into the stomach was noted, as well as the position and movements of the diaphragm, the behavior of the heart and lungs, and