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Ji Kang
Nephrology
About me
Deputy Chief Physician of Internal Medicine, Master of Medicine.
Proficient in diseases
Nephrology, cardiology, pulmonology, and other related diseases.
Voices
How to determine the stages of IgA nephropathy?
IGA nephropathy has different grading methods, such as Lee grading and Hass grading. Both classify the pathological changes of IGA nephropathy into five stages, with similar descriptions. According to the Lee grading: Grade 1: Most glomeruli are normal, with occasional mild mesangial widening or without cellular proliferation, and no tubulointerstitial changes. Grade 2: Glomeruli show focal mesangial proliferation, with no tubulointerstitial changes. Grade 3: Glomeruli exhibit diffuse mesangial proliferation, with occasional segmental focal lesions, rare crescents, and adhesions, focal interstitial edema, and rare cellular infiltration. Grade 4: Glomeruli show diffuse severe mesangial proliferation and sclerosis, partial or segmental glomerulosclerosis, crescent formation observed but less than 45%, tubular atrophy, interstitial infiltration. Grade 5: The nature of the lesions is similar to grade 4 but more severe. Crescent formation in glomeruli is greater than 45%.
IgA nephropathy is a disease.
IgA nephropathy is the most common type of primary glomerular disease, caused by the deposition of IgA-dominant immunoglobulins in the glomerular mesangial area. It has a short latency period, with symptoms appearing early. Clinical manifestations of IgA nephropathy are diverse, with approximately 40%-50% of patients experiencing macroscopic hematuria hours to two days after precursor symptoms such as upper respiratory tract infections, and some patients also suffer from severe back pain and abdominal pain. About 30%-40% of patients only present with asymptomatic hematuria or proteinuria. Approximately 5%-20% of patients exhibit severe edema and substantial proteinuria, showing symptoms of nephrotic syndrome. At the onset of the disease, about 10% of patients also have hypertension. As the disease progresses, those with hypertension can exceed 40%. Less than 10% of patients may experience acute renal failure.