Rapidly Progressive Glomerulonephritis: A COVID-19 Case Report.

Area of Science:

• Nephrology
• Immunology
• Infectious Diseases

Background:

• Anti-neutrophil cytoplasmic antibody (ANCA)-associated vasculitis is a severe systemic autoimmune disease.
• It can lead to rapidly progressive glomerulonephritis (RPGN) and potentially fatal outcomes if untreated.
• COVID-19 has been associated with various physiological effects, including potential autoimmune triggers.

Observation:

• A rare case of ANCA-associated vasculitis is presented in an elderly male with no prior autoimmune history.
• The patient developed symptoms after a recent COVID-19 illness, presenting with declining renal function, acute renal failure, and pericarditis.
• Elevated anti-myeloperoxidase (MPO-AB) and perinuclear ANCA (p-ANCA) antibodies were detected.

Findings:

• Kidney biopsy confirmed focal crescentic glomerulonephritis, characteristic of RPGN.
• The patient was treated with steroid therapy.
• Treatment resulted in notable improvement and recovery of baseline kidney function.

Implications:

• This case suggests a potential association between COVID-19 infection and the development of ANCA-associated vasculitis.
• It underscores the importance of considering autoimmune sequelae following viral infections, particularly in elderly individuals.
• Prompt diagnosis and immunosuppressive therapy are crucial for managing ANCA-associated vasculitis and preventing irreversible renal damage.