. The American journal of roentgenology, radium therapy and nuclear medicine . the stereoscopic plates of these injectedkidneys we learn to recognize, much betterthan in pyelograms, the characteristic nor-mal and abnormal appearance of the pel-vis and calyces and understand the pyelo-grams all the better, even when they showincomplete filling due to growth forma-tion. Single pyelograms may suffice inmany diseased conditions of the kidney,but in tumor formation, stereoscopic pye-lograms are essential. When these are nega-tive, as in the case I cited, often methods may be found of ai
. The American journal of roentgenology, radium therapy and nuclear medicine . the stereoscopic plates of these injectedkidneys we learn to recognize, much betterthan in pyelograms, the characteristic nor-mal and abnormal appearance of the pel-vis and calyces and understand the pyelo-grams all the better, even when they showincomplete filling due to growth forma-tion. Single pyelograms may suffice inmany diseased conditions of the kidney,but in tumor formation, stereoscopic pye-lograms are essential. When these are nega-tive, as in the case I cited, often methods may be found of aid. In aninjected case of a removed hypernephromayou see very instructively how little ofthe kidney tissue is left. Compare thiswith the stereoscopic photograph of thekidney after section. Only the upper bor-der of the kidney is left, the whole massotherwise is tumor formation. In this and in a few other cases, the in-jection of the colon with a barium enemawas also of considerable diagnostic help tous. The displacement may be only slightand then invariablv onlv forward, but. Fig. 7. Hypernephroma of Upper Portion of Kidney. Bismuth Injection of Specimen 334 Open Safety Pin in an Infants Stomach stereoscopic plates will bring this out. Ofmore value is the displacement downward,of the splenic flexure more than of the he-patic. This has proven not only of greatvalue in showing the retroperitoneal posi-tion of the tumor, but in two cases ithelped us rule out tumor growths of thebowel. In another case where cancer ofthe stomach was suspected, the bariummeal showed the stomach displaced up-ward and to the right by an extragastricmass. But this mass also shoved the de-scending colon way over to the medianline. In only one other case of tuber-culous peritonitis, with enormous retro-peritoneal glands, did I see a similar dis-placement of the descending colon. Me-tastatic tumors originating in the retro-peritoneal space would give similar find-ings. In one case of large tuberculous kid-n
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