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      Prevalence of Glomerular Hyperfiltration and Nephromegaly in Normo- and Microalbuminuric Type 2 Diabetic Patients

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          Glomerular hyperfiltration, correlated with nephromegaly, is a frequent finding in type 1 (insulin-dependent) diabetes. In type 2 (non-insulin-dependent) diabetes, very few studies have been performed, and the results have been inconclusive. Glomerular filtration rate (GFR) and kidney volume, using <sup>99</sup>mTc-DTPA scintigraphy and ultrasonography, respectively, were evaluated in 58 control subjects and 163 type 2 diabetic patients; 79 of whom were normoalbuminuric and 84 microalbuminuric. In the two groups of patients, these parameters did not differ significantly from those of controls, even when hypertensive subjects were excluded. Glomerular hyperfiltration was observed in 10 cases; all were normotensive (9.8%), of whom 7 were normoalbuminuric and 3 microalbuminuric. Nephromegaly was observed in 3 other normotensive microalbuminuric diabetic patients. Hypertensive subjects showed a lower GFR than normotensive patients and control subjects. Multivariate analysis showed a negative correlation between glomerular filtrate and systolic blood pressure (BP) in the overall population of patients and in normo- and microalbuminuric patients taken separately. It is concluded that the relationship between these variables forms a continuum in our type 2 diabetic patients; it may also be important in determining the low prevalence of hyperfiltration and nephromegaly found in our patients, who had BP levels higher than those of controls.

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          Author and article information

          S. Karger AG
          12 December 2008
          : 65
          : 2
          : 206-211
          Cattedra di aMedicina Interna, OPD, bDiabetologia, cMedicina Nucleare, dIstituto di Scienze Eidologiche e Radiologiche, Università di Siena, Italia
          187475 Nephron 1993;65:206–211
          © 1993 S. Karger AG, Basel

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          Pages: 6
          Original Paper


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