. Radiography and radio-therapeutics . Fig. 299.—Hour-glass contraction. Four railiograplis taken at intervals of two seconds (y^^ second exposure). The peristalticwave is well seen on the walls of the upper sac. A small penetrating ulcer on lessercurvature with barium food in .situ and gas bubble shown in upper part. marks the seat of an ulcer on the lesser curvature, which by cicatrisation hasled to organic contraction of the stomach. This condition has to be dis-tinguished from spasmodic hour-glass contraction, and from that caused bynew growth of the body of the PLATE LXX.—Hour-g
. Radiography and radio-therapeutics . Fig. 299.—Hour-glass contraction. Four railiograplis taken at intervals of two seconds (y^^ second exposure). The peristalticwave is well seen on the walls of the upper sac. A small penetrating ulcer on lessercurvature with barium food in .situ and gas bubble shown in upper part. marks the seat of an ulcer on the lesser curvature, which by cicatrisation hasled to organic contraction of the stomach. This condition has to be dis-tinguished from spasmodic hour-glass contraction, and from that caused bynew growth of the body of the PLATE LXX.—Hour-glass Contraction of the Stomach. a, Sliortly after ingestion of liaiiuni meal. Note shape of stomacli small portion of themeal engaging in a narrow channel of communication. h, Same stomach several hours later ; the greater portion of the meal is now in the lower sac still contains a portion of the food, nearly all of the meal is now m the lower hours after ingestion very little of the food has passed through the pylorus. c. Radiograph taken at ten hours, and later showed marked delay in emptying time ol stomach. Diagnosis, hour-glass contraction of stomach, also pyloric stenosis secondary to another ulcer. CANCER OF THE STOMACH 353 Malignant Hour-glass Contraction. — The invasion and concentricspread of a gro^vth in the circumference of the body of the organ resultsin an hour-glass form of stomach, the growth spreading in all directions,upwards, downwards, and concentrically, though the extension may not beequal in all directions. The res
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