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Pathology - diabetic nephropathy
Definition: Chronic kidney disease caused by diabetes mellitus.
Epidemiology • A leading cause of chronic renal disease.
Aetiology • Diabetes. • Only 30-40% of diabetics develop nephropathy, suggesting that other factors play a role.
Pathogenesis • High glucose levels harm endothelial cells in the glomeruli, resulting in glomerulosclerosis and nephron loss.
Presentation • A patient with diabetes mellitus develops proteinuria. • Microalbuminuria often precedes overt proteinuria, which can lead to nephrotic syndrome. • Hypertension is always present.
Histopathology • Glomerulosclerosis, a diffuse increase in the mesangial matrix, can lead to the formation of Kimmelsteil-Wilson nodules. • Thicker glomerular basement membranes. • Hyalinization of the afferent and efferent arterioles. • Tubulointerstitial fibrosis is proportional to glomerular injury. 2 A kidney biopsy is not essential to confirm a diagnosis of diabetic nephropathy if the clinical presentation is typical. Biopsies are often reserved for unusual cases where alternate diagnoses may be possible. immune fluorescence • IgG deposition in glomerular and tubular basement membranes can be observed. Electron microscopy • Thickened glomerular basement membrane and expanded mesangial matrix are observed. • There are no immunological complexes present.
Prognosis: Gradual decline in renal function. • Patients with severe hypertension and significant proteinuria fare poorly. • Proper blood pressure management is crucial for reducing disease progression.
Definition: Chronic kidney disease caused by diabetes mellitus.
Epidemiology • A leading cause of chronic renal disease.
Aetiology • Diabetes. • Only 30-40% of diabetics develop nephropathy, suggesting that other factors play a role.
Pathogenesis • High glucose levels harm endothelial cells in the glomeruli, resulting in glomerulosclerosis and nephron loss.
Presentation • A patient with diabetes mellitus develops proteinuria. • Microalbuminuria often precedes overt proteinuria, which can lead to nephrotic syndrome. • Hypertension is always present.
Histopathology • Glomerulosclerosis, a diffuse increase in the mesangial matrix, can lead to the formation of Kimmelsteil-Wilson nodules. • Thicker glomerular basement membranes. • Hyalinization of the afferent and efferent arterioles. • Tubulointerstitial fibrosis is proportional to glomerular injury. 2 A kidney biopsy is not essential to confirm a diagnosis of diabetic nephropathy if the clinical presentation is typical. Biopsies are often reserved for unusual cases where alternate diagnoses may be possible. immune fluorescence • IgG deposition in glomerular and tubular basement membranes can be observed. Electron microscopy • Thickened glomerular basement membrane and expanded mesangial matrix are observed. • There are no immunological complexes present.
Prognosis: Gradual decline in renal function. • Patients with severe hypertension and significant proteinuria fare poorly. • Proper blood pressure management is crucial for reducing disease progression.
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