Rapidly Progressive (Crescentic) Glomerulonephritis

Rapidly Progressive (Crescentic) Glomerulonephritis is a serious kidney condition that affects the tiny filtering units called glomeruli. It causes rapid loss of kidney function over days to weeks, which can lead to dangerous buildup of waste in the body. The disease involves inflammation and damage to the glomeruli, leading to leakage of blood and protein into the urine. This condition primarily affects the renal system and can cause symptoms like swelling, high blood pressure, and decreased urine output. Early detection is critical because the damage can progress quickly and may result in kidney failure if untreated.

Rapidly Progressive (Crescentic) Glomerulonephritis (RPGN) is defined by the presence of extensive glomerular crescent formation on kidney biopsy, reflecting severe glomerular injury. It is characterized by a rapid decline in glomerular filtration rate due to aggressive inflammation and proliferation of parietal epithelial cells in Bowman's space. The underlying mechanisms include autoimmune-mediated injury such as anti-glomerular basement membrane antibodies, immune complex deposition, or pauci-immune vasculitis often associated with ANCA antibodies. RPGN is clinically significant because it leads to acute kidney injury and can progress to end-stage renal disease without prompt immunosuppressive treatment. Histologically, the hallmark is the presence of crescents composed of proliferating cells and fibrin in the glomeruli. The condition is a nephrological emergency requiring rapid diagnosis and intervention.