. Roentgen interpretation; a manual for students and practitioners . Fig. 138.—Stomach sho-wing penetrating ulcer of lesser curvature. Patient standing. irregularities of carcinoma which vary according to the size, shapeand position of the tumor. These deformities are usually eitherannular or due to the presence of irregular masses invading thebarium mixture, leaving ragged holes or markings suggesting fingerprints. We may also have the local contractions due to an ulcerwith its associated spasm; or the extensive defects of lues, suggest- STOMACH 163 ing ulcer or carcinoma. Another deformity i
. Roentgen interpretation; a manual for students and practitioners . Fig. 138.—Stomach sho-wing penetrating ulcer of lesser curvature. Patient standing. irregularities of carcinoma which vary according to the size, shapeand position of the tumor. These deformities are usually eitherannular or due to the presence of irregular masses invading thebarium mixture, leaving ragged holes or markings suggesting fingerprints. We may also have the local contractions due to an ulcerwith its associated spasm; or the extensive defects of lues, suggest- STOMACH 163 ing ulcer or carcinoma. Another deformity is that which occursas the result of contraction of scar tissue in the gastric wall, produc-ing a so-called hour-glass stomach. This deformity is constant inall positions. (3) Defects due to extragastric causes such as tumorsor pressure as, for example, the gall-bladder which produces arounded depression in the region of the pylorus, or pancreatic tumorswhich cause irregularity of the greater or lesser curvature, are not. Fig. 139.—Tracing of stomach, showing large ulcer on lesser curvature. constant in all positions of the patient. An enlarged liver may causedefect in the antrum by compressing it against the spine. In platestaken in the prone position the pressure of the spine against theabdominal wall commonly causes a break in the barium shadowoverlying it. Perigastric adhesions, particularly those about thepyloric end of the stomach, may produce ragged defects suggestingcarcinoma but as a rule they are not constant in all positions.(4) Any solid material in the stomach, such as food masses, foreign 164 GASTRO-IXTESTIXAL TRACT bodies, hair balls, and the like, may cause defects in the bariummass resembling malignant disease. However, these irregularitiesshift with changes in position of the patient and there is no inter-ference with peristalsis. Papillomata produce a defect similar tothat seen in large foreign bodies, but there is little displacement of
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