1918 Archives of Internal Medicine  
MINNEAPOLIS So-called renal diabetes has been reported at various times in the literature. The term is now recognized as a misnomer and the condi¬ tion should be called renal glycosuria. True cases of renal glycosuria are rare and many so diagnosed are open to question, being mild or atypical diabetes mellitus. The lesion is apparently renal and due to a constant excretion by the kidney of a small amount of sugar while the blood sugar is normal. The tissues can still utilize carbohydrates, and
more » ... carbohydrates, and as a result on any diet the percentage of sugar excreted does not vary to any great extent. The glycosuria is usually found by accident or routine examination, the patient reporting for life insurance or irrelevant illness. Most of the patients do not present any of the clinical symptoms of diabetes melli¬ tus and are apparently in good health. Pathologically, the glycosuria seems to be due to a lowered kidney threshold for carbohydrates. The first essential necessary for a diagnosis is a blood sugar run¬ ning within normal limits. The level is placed differently by various authorities. The general opinion at present places the normal percent¬ age of blood sugar between 0.7 and 0.15. In this we concur. In order to make the diagnosis of renal glycosuria, it is necessary to have the following data : 1. A urine containing dextrose in amount unchanged to any great extent by fluctuation of carbohydrate intake. A blood sugar of normal percentage. A number of men have recorded cases of renal glycosuria. Allen1 has thoroughly reviewed the literature and asserts that he was able to find only two true cases of this condition, namely, those reported by Boringer2 and Tachau.3
doi:10.1001/archinte.1918.00090110002001 fatcat:atiello5mnbh3m5hh5kgewksgi