A "Mini-Epidemic" of anti-glomerular basement membrane disease: Clinical and epidemiological study. | Read by QxMD (original) (raw)
Umesh Lingaraj, Shivaprasad Sasivehalli Mallappa, Rajiv Elkal Neminah, Satishkumar Madakala Mohan, Leelavathi Venkatesh, Sreedhara Chikkanayakanahalli Gurusiddaiah, Niranjan Manibally Rachaiah
Acute glomerulonephritis due to anti-glomerular basement membrane (anti-GBM) antibody disease is rare, estimated to occur in fewer than one case per million population and accounts for less than 20% of rapidly progressive glomerulonephritis. The prevalence among patients evaluated for potential glomerular disease is lower. It accounts for fewer than 3% of all kidney biopsies done with crescentic glomerulonephritis. Cases of anti-GBM disease occurring in a cluster have rarely been reported. All biopsy proven anti-GBM disease cases were collected from January 2015 to March 2015 at our Institute. All cases were analyzed for demographic and clinical profile, pathological findings, treatment received and for any common environmental antigenic source. A total of 11 new biopsy proven anti-GBM cases were seen within a span of three months. Age group varied from 17-80 years. Seven were males and four were females. All were dialysis dependent at presentation. Seven had active cellular crescents, and four had fibrocellular. Only one patient was a smoker and none had a history of exposure to any forms of hydrocarbons. The peak seen from January 2015 to March 2015 does not correlate with any of seasonal occurrence of infections in southern India. Although there was clustering of cases to southern territories of Karnataka state, no common etiological agents could be identified. No patient had any previous urological surgeries. All patients received methylprednisolone with plasmapheresis 5-7 sessions and cyclophosphamide. All 11 patients were dialysis dependent at the end of three months. We conclude anti-GBM disease cannot be regarded as a rare cause of renal failure and lung hemorrhage. The occurrence of such epidemic within a short period suggests a possible unidentified environmental factor like infection or occupational agents as inciting agents. Identification of such inciting agents could help us in instituting appropriate preventing measures.
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