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Postinfectious Glomerulonephritis with Crescents in an Elderly Diabetic Patient after Acute Gastroenteritis: Case
Satyanand Sathi1, Anil Kumar Garg1, Ajay Kumar Singh2
1Department of Medicine, S.M.M.H. Medical College Saharanpur, Saharanpur, India.
Insights
Postinfectious glomerulonephritis (PIGN) can affect adults, especially the elderly and immunocompromised. Early steroid treatment may improve outcomes in atypical PIGN cases, avoiding dialysis.
Area of Science:
- Nephrology
- Immunology
- Pathology
Background:
- Postinfectious glomerulonephritis (PIGN) is typically a childhood illness following infections.
- In adults, PIGN is more prevalent in immunocompromised individuals, including diabetics and alcoholics.
- Staphylococcus is a common cause in the elderly, contrasting with Streptococcus in younger populations.
Observation:
- An elderly diabetic male presented with severe acute kidney injury and active urinary sediment post-gastroenteritis.
- Laboratory results showed significantly low serum C3 and normal serum C4 levels.
- Renal biopsy revealed diffuse proliferative glomerulonephritis with crescents and characteristic immunofluorescence and electron microscopy findings.
Findings:
- The patient exhibited a severe presentation of PIGN, atypical for his demographic.
- Despite controversial treatment guidelines, the patient showed a remarkable response to steroid therapy.
- Steroid treatment led to recovery, obviating the need for hemodialysis within two weeks.
Implications:
- This case highlights the importance of considering atypical PIGN presentations in the elderly.
- Prompt diagnosis and management, including steroid therapy, can lead to favorable outcomes in adult PIGN.
- Awareness of PIGN in immunocompromised adults, particularly diabetics, is crucial for timely intervention.
Abstract:
Postinfectious glomerulonephritis (PIGN) is primarily a disease of childhood. It occurs after upper respiratory tract infection or skin infections. Streptococcus is the most common causative agent, but in the elderly, staphylococcus is the main culprit. In adults, PIGN is more common in immunocompromised patients, particularly diabetics and alcoholics. Here, we report the case of an elderly diabetic male who presented with severe acute kidney injury with active urinary sediment after acute gastroenteritis. Additional analyses revealed a very low serum C3 level and a normal serum C4 level. Renal biopsy showed diffuse proliferative glomerulonephritis with crescents. Direct immunofluorescence showed mesangial and capillary wall staining for C3 and IgG (2+, mesangial and segmental capillary wall, granular). Renal electron microscopy showed subepithelial hump-like electron-dense deposits. The role of steroid in the treatment of PIGN is controversial and there is no standard protocol, but our patient responded very well to steroid as he did not require hemodialysis after 2 weeks of initiation of steroid therapy. We should be aware of an atypical presentation of PIGN in elderly to ensure correct diagnosis.
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