. Radiography and radio-therapeutics . tion ; alteration in the shape of the stomach resultingfrom lesions affecting other organs in the abdomen ; extragastric pressurefrom tumours or adhesions. In order to appreciate fully the diagnosticsignificance of these affections, it will be necessary to consider theappearances presented by each seriatim. 346 RADIOGRAPHY It is not possible to deal fully with the pathology of gastric ulcer, norwith the many theories which have accumulated around the aetiology ofthe complaint; but it is well that the radiologist should have a clear con-ception of the vari
. Radiography and radio-therapeutics . tion ; alteration in the shape of the stomach resultingfrom lesions affecting other organs in the abdomen ; extragastric pressurefrom tumours or adhesions. In order to appreciate fully the diagnosticsignificance of these affections, it will be necessary to consider theappearances presented by each seriatim. 346 RADIOGRAPHY It is not possible to deal fully with the pathology of gastric ulcer, norwith the many theories which have accumulated around the aetiology ofthe complaint; but it is well that the radiologist should have a clear con-ception of the varieties met with, the common situations, and the sequelae. Welch, from hospital statistics, collected 793 cases, and found that 288were on the lesser curvature, 235 on the posterior wall, 95 at the pylorus, 69on the anterior wall, 50 at the cardia, 29 at the fundus, 27 on the greatercurvature. The Acute Ulcer.—The acute ulcer is usually small, and punched out,and the peritoneal surface is not thickened. This type of ulcer is therefore.
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