N04.3 Nephrotic syndrome with diffuse mesangial proliferative glomerulonephritis

Name of the Condition

• Nephrotic Syndrome with Diffuse Mesangial Proliferative Glomerulonephritis
• ICD-10 Code: N04.3

Summary

Nephrotic syndrome with diffuse mesangial proliferative glomerulonephritis is a kidney disorder defined by the classic nephrotic syndrome triad—significant proteinuria, hypoalbuminemia, and edema—along with elevated cholesterol levels. The "diffuse mesangial proliferative glomerulonephritis" indicates widespread proliferation of mesangial cells in the kidney's filtering units (glomeruli), which impairs filtration and contributes to protein loss.

Causes

The condition often arises from primary kidney diseases, such as diffuse mesangial proliferative glomerulonephritis, where the glomeruli show increased mesangial cell growth. Secondary causes may include infections, medications, or systemic diseases, though the exact etiology is sometimes unclear.

Risk Factors

• Genetic predisposition to kidney disease
• Underlying conditions like diabetes or autoimmune disorders
• Exposure to certain drugs (e.g., NSAIDs)
• Recent infections (e.g., hepatitis B/C, HIV)

Symptoms

• Severe swelling (edema) in the legs, ankles, or around the eyes
• Foamy or frothy urine due to excess protein
• Unexplained weight gain from fluid retention
• Fatigue and loss of appetite

Diagnosis

Diagnosis involves urine tests to detect proteinuria, blood tests to assess kidney function and albumin levels, and a kidney biopsy to confirm diffuse mesangial proliferative changes. Imaging or additional tests may be used to rule out secondary causes.

Treatment Options

• Corticosteroids or immunosuppressants to reduce inflammation
• Blood pressure medications (e.g., ACE inhibitors) to protect kidney function
• Cholesterol-lowering drugs (e.g., statins) to manage hyperlipidemia
• Diuretics to reduce edema
• Dietary modifications (e.g., low-sodium, protein-controlled diet)

Prognosis and Follow-Up

Prognosis varies depending on the underlying cause and response to treatment. Regular monitoring of kidney function, protein levels, and blood pressure is essential. Some patients may experience remission, while others may progress to chronic kidney disease.

Complications

• Chronic kidney disease or kidney failure
• Blood clots (thromboembolism) due to protein loss
• Infections from immunosuppressive therapy
• Malnutrition or vitamin deficiencies

Lifestyle & Prevention

• Maintain a balanced diet low in sodium and saturated fats
• Stay hydrated and avoid excessive fluid retention
• Manage underlying conditions (e.g., diabetes, hypertension)
• Avoid nephrotoxic medications (e.g., certain NSAIDs)
• Regular exercise to support overall health

When to Seek Professional Help

Seek immediate medical attention for:

• Sudden or severe swelling (edema)
• Foamy urine or reduced urine output
• Unexplained weight gain or shortness of breath
• Persistent fatigue or confusion

Tips for Medical Coders

Document the presence of diffuse mesangial proliferative changes confirmed by biopsy. Ensure the code N04.3 is used when the morphologic changes are specified as diffuse mesangial proliferative glomerulonephritis. Include details about proteinuria, hypoalbuminemia, or edema if available to support the diagnosis.