The occurrence of small, usually microscopic, quantities of blood in the urine of chronic nephritics is so common that it is almost to be expected if a case is followed long enough and carefully enough. Attacks of profuse hemorrhage from the kidneys, in the absence of trauma, usually lead us to think of stone, tuberculosis, or new growth; or, as a more unusual cause, a floating kidney. The fact that an ordinary chronic nephritis, either parenchymatous or interstitial, may be associated not so very infrequently with profuse hematuria or attacks of colic has not been generally recognized.
The subject has been recently studied by Askanazy,1 who was able to collect from Lichtheim's clinic alone eleven cases, three of which came afterward to the postmortem table. A study of these cases and of the literature showed that the condition is far from being uncommon, though the hematuria and colic are
PROFUSE HEMATURIA AND RENAL COLIC IN CHRONIC NEPHRITIS. JAMA. 1906;XLVI(15):1114. doi:10.1001/jama.1906.02510420044008
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