In recent years much has been said concerning hemorrhage from the normal kidney. Usually the diagnosis settled upon tumor, tuberculosis, or nephrolithiasis, and great has been the surprise when the kidney on exposure was seen to be macroscopically normal, as has happened not a few times. In many of these cases the apparently normal kidney has been the seat of nephritis, but cases have been recorded of renal hemorrhage and hematuria in which the histologic examination failed to reveal any changes in the kidneys. And there are many other cases the course of which would seem to speak for normal kidneys, although no opportunity for microscopic examination was given. Israel,1 in his article on splitting of the kidney in acute and chronic diseases of the parenchyma, believes that a large number of the instances of hemorrhage from apparently normal kidneys concern chronic nephritis. As pointed out by Naunyn,2
OPERATION FOR HEMATURIA IN NEPHRITIS. JAMA. 1900;XXXIV(14):879–880. doi:10.1001/jama.1900.02460140051007
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