Nephrotic syndrome is a kidney syndrome caused by a variety of etiology, pathology and clinical diseases. Nephrotic syndrome can almost always occur in diseases of glomerular damage. It is clinically characterized by massive proteinuria (≥ 3.5g/d), hypoalbuminemia (≤ 30g/L), edema, and hyperlipidemia. Among them, a large amount of proteinuria and hypoproteinemia are necessary conditions for nephrotic syndrome.

Nephrotic syndrome can be divided into two Classes, namely nephrotic syndrome originating in the kidneys and nephrotic syndrome secondary to systemic diseases.

Primary nephrotic syndrome is caused by the original lesion in the glomerulus, according to the current domestic Clinical classification, in primary glomerular diseases, acute glomerulonephritis, chronic glomerulonephritis and glomerulonephropathy can all have nephrotic syndrome in the disease process.

Secondary nephrotic syndrome is kidney disease secondary to systemic diseases, such as diabetic nephropathy, systemic Lupus erythematosus nephritis, allergic purpura nephritis, renal amyloidosis.

The above can occur at any age.

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