Idiopathic membranous nephropathy in the elderly: a comparative study

Area of Science:

• Nephrology
• Geriatric Medicine
• Internal Medicine

Background:

• Idiopathic membranous nephropathy (IMN) is a common cause of nephrotic syndrome in adults.
• Elderly patients represent a significant portion of IMN cases, but their outcomes are less understood.
• Age-related decline in renal function may influence the presentation and progression of IMN.

Purpose of the Study:

• To compare the clinical characteristics and outcomes of elderly (≥60 years) versus younger patients with IMN.
• To evaluate the impact of age on the development of chronic renal insufficiency and end-stage renal failure.
• To assess the efficacy and safety of steroid treatment in elderly patients with IMN.

Main Methods:

• Retrospective study of 323 IMN patients over 19 years.
• Analysis of 74 elderly patients (≥60 years) compared to a younger cohort.
• Assessment of renal function using serum creatinine and calculated creatinine clearance (Cockcroft-Gault).

Main Results:

• Elderly patients presented with higher serum creatinine and lower creatinine clearance.
• Higher incidence of chronic renal insufficiency (59% vs 25%) in the elderly group.
• Similar rates of renal function decline and complete remission between age groups; no benefit from steroid therapy.

Conclusions:

• Elderly patients with IMN have a higher risk of chronic renal insufficiency, primarily due to reduced renal reserve, not accelerated disease progression.
• Accurate assessment of renal function in the elderly requires calculated creatinine clearance.
• Routine steroid treatment is not recommended for elderly IMN patients due to lack of efficacy and increased complication risk.