N00.3

Clinical Causes: Post-infectious immune responses, commonly following streptococcal throat or skin infections Other infections causing immune activation Autoimmune disorders such as systemic lupus erythematosus Certain vasculitis conditions affecting the small blood vessels in the kidneys Exposure to specific drugs or toxins in rare cases

Key Symptoms: Blood in the urine (hematuria) that may appear smoky or tea-colored Protein in the urine (proteinuria) Swelling in the face, hands, legs, or abdomen due to fluid retention Decreased urine output or dark-colored urine High blood pressure Fatigue and general malaise Fever and additional signs of infection or inflammation in some cases

Diagnosis Path: Diagnosis of this condition involves a combination of clinical evaluation and laboratory tests. Key steps include: - Urinalysis to detect blood and protein in the urine - Blood tests to assess kidney function (creatinine and blood urea nitrogen levels) - Serum complement levels, which are often decreased during active disease - Imaging studies such as renal ultrasound to evaluate kidney size and structure - Kidney biopsy may be performed to confirm the diagnosis and determine the extent of glomerular proliferation and inflammation The diagnostic process helps differentiate this condition from other kidney diseases and guides treatment decisions.

Treatment Protocols: Management of acute nephritic syndrome with diffuse mesangial proliferative glomerulonephritis focuses on controlling inflammation, managing symptoms, and preserving kidney function. Typical approaches include: - Blood pressure control, often with medications such as ACE inhibitors or ARBs - Reduction of proteinuria through specific medications - Use of corticosteroids or immunosuppressive agents in cases with significant inflammation - Diuretics to control edema and fluid overload - Dietary modifications, including salt restriction - Treating underlying or associated infections or autoimmune conditions - Regular monitoring of kidney function and urine analysis to assess disease progression In severe cases, hospitalization may be required for close observation and intensive management. Long-term follow-up is essential to monitor for potential chronic kidney disease.