Etiopathological Study of Crescentic Glomerulonephritis and its Outcome: A Retrospective Analysis.

Introduction: Crescentic Glomerulonephritis (CGN) is most aggressive structural phenotype and accounts for 2%-7% of renal biopsy in most series. The aim of study was to assess the clinical feature and outcome of CGN at our centre. Material and Methods: The renal biopsy performed during the period of January 2015 to January 2018 was studied and patients showing crescentic glomerulonephritis on histology were selected for this study. The clinical presentation, immunological assay, biochemical and haematological investigations, treatment protocol and final outcome at three month of these patients were analysed in the present study. Results: Of 380 biopsy, 26 (male=17, female=9) patients had histological evidence of CGN (6.8%). The age of patients ranged between 13-75 (mean=43) years. Fibro cellular and cellular crescent was noted in 84.61% and 15.38% of patients respectively. Small vessels vasculitis and granuloma was observed in 5 (19.23%) cases. Based on immunohistopathology, we observed type I (n=3), type II (n=8), type III (n=5), type IV (n=3), and type V (n=7) crescentic GN in 11.53%, 30.76%, 19.23%, 11.53% and 26.92% of patients respectively. Haemodialysis was given to 22(84.61%) and 4(15.38%) patients were treated with immunosuppressive therapy. Plasmapheresis was used in two double positive (ANCA + Anti GBM Ab) patients. Remaining 21(80.76%) has progressed to ESRD over a period of 2-3 months. Conclusion: Type II (immune complex) CGN was most common type followed by type V (immune negative) and type III (pauci-immune) CGN. The crescentic GN had worse prognosis with >80% of patients progressed to ESRD within 3 month of time from onset of illness. Early diagnosis and treatment is associated with favourable outcome.