P0455CLINICAL PROFILE OF C3 GLOMERULOPATHY AT A TERTIARY CARE CENTRE

Abstract Background and Aims To study the clinico-pathological profile of patients with C3 glomerulonephritis at a tertiary care entre. Method A prospective observational study of all cases of C3 glomerulonephritis was done between August 2016 and December 2017. C3 glomerulonephritis was defined by predominant glomerular C3 fragment deposition with electron-dense deposits on EM Results Total of the 1190 patients under went biopsy during the study period. C3 glomerulonephritis was present in 32 cases (2.68%). The mean age was 35±2 years. Out of the 32 patients, 18 were male ( 56.25% ) and 14 were female (43.75% ). Hypertension was present in 30 out of 32 patients (93.7%) while diabetes was present in 7 patients (21.8%). Most common presentation was with RPGN (72%). 100% patients had active urinary sediments. The mean serum creatinine at admission was 5.15mg/dl while it was 3.18mg/dl at discharge. The mean serum C3 was 83.8 mg/dl with 18 patients (56.25%) having low serum C3 levels in our study. All patients had normal serum C4 levels with mean being 29.34 mg/dl. Anti CFH antibody titres were measured in 6 patients of with it was elevated in 2 patients (33.3%). On LM, 14 out of 32 had crescentic GN (43.75%), 12 had diffuse exudative pattern (37.5%), 4 had diffuse mesangioproliferative pattern (12.5%), 3 had MPGN pattern (9.37%), 3 had focal exudative pattern (9.37%), 1 patient had glomerular TMA (3.15%) and 1had chronic sclerosing pattern ( 3.15%). On IF, all patients had dominant C3 staining. Also 3 (9.37%) patients had IgG staining of 1+ intensity. EM study was done in two patients and was suggestive of DDD in one patient (3.15%). All patients were managed with pulse steroids followed by oral steroids. IV Cyclophosphamide was used monthly for 6 doses in 14 patients ( 43.7%) while oral cyclophosphamide was used in 2 patients (6.25%). Plasmapharesis was done in 11 patients (34.37%) and 11 patients required haemodialysis (34.37%) Conclusion C3 glomerulonephritis has emerged as a new entity in the recent past with significant percentage of our patients presenting with RPGN. Hypertension was present in most patients. On light microscopy, the most common presentation was crescentic glomerulonephritis, One third of our patients had advanced renal failure requiring haemodialysis. Plasmapharesis was done in one third of patients.