{"id":11296,"date":"2026-09-13T14:18:43","date_gmt":"2026-09-13T14:18:43","guid":{"rendered":"https:\/\/www.kauveryhospital.com\/ima-journal\/?p=11296"},"modified":"2026-09-15T05:28:09","modified_gmt":"2026-09-15T05:28:09","slug":"a-case-of-renal-limited-anti-gbm-disease-in-an-elderly-patient","status":"publish","type":"post","link":"https:\/\/www.kauveryhospital.com\/ima-journal\/ima-journal-september-2026\/a-case-of-renal-limited-anti-gbm-disease-in-an-elderly-patient\/","title":{"rendered":"A Case of Renal\u2011Limited Anti\u2011GBM Disease in an Elderly Patient"},"content":{"rendered":"<p class=\"caps\">[vc_section][vc_row][vc_column][vc_column_text]<\/p>\n<h2>Abstract<\/h2>\n<p>Anti\u2011glomerular basement membrane (anti\u2011GBM) disease is a rare autoimmune cause of rapidly progressive glomerulonephritis (RPGN). It is characterized by autoantibodies directed against the non\u2011collagenous domain of the \u03b13 chain of type IV collagen. While pulmonary hemorrhage is a classical feature, renal\u2011limited forms are increasingly recognized and pose diagnostic challenges. We report a 73\u2011year\u2011old woman with previously normal renal function who presented with anorexia, nausea, exertional breathlessness, pedal edema, and anuria. Laboratory evaluation revealed severe azotemia and markedly elevated anti\u2011GBM antibody titres. Renal biopsy demonstrated diffuse crescentic glomerulonephritis with linear IgG deposition along the GBM. She required hemodialysis and was initiated on immunosuppression with glucocorticoids, cyclophosphamide, and plasma exchange. This case underscores the importance of early recognition of renal\u2011limited anti\u2011GBM disease, even in the absence of pulmonary involvement, and highlights the prognostic implications of histological findings.<\/p>\n<h2>Introduction<\/h2>\n<p>Anti\u2011GBM disease is an uncommon autoimmune small\u2011vessel vasculitis, with an incidence of approximately 0.5\u20131 case per million population annually. It is mediated by autoantibodies targeting the \u03b13 chain of type IV collagen, leading to complement activation, neutrophil recruitment, and glomerular injury. Clinically, patients often present with a combination of renal and pulmonary involvement, termed Goodpasture\u2019s syndrome. However, renal\u2011limited phenotypes are increasingly recognized, particularly in elderly patients, and may be overlooked in the absence of pulmonary hemorrhage. The disease course is fulminant, with rapid progression to end\u2011stage renal disease if untreated. Early diagnosis and prompt initiation of therapy are essential to improve outcomes.\u00b9,\u00b2<\/p>\n<h2>Case Presentation<\/h2>\n<p>A 73\u2011year\u2011old woman, known to have type 2 diabetes mellitus and hypertension for fifteen years, presented with a one\u2011month history of anorexia and nausea. This was followed by exertional breathlessness for seven days, bilateral pedal edema for three days, and anuria for one day. She had been apparently well until one month prior to admission, when she developed progressive anorexia and nausea. Her baseline serum creatinine was 0.9 mg\/dL in April 2026, with no previously documented renal dysfunction. On examination, she was pale, with bilateral pitting pedal edema. Her blood pressure was 100\/68 mmHg, pulse rate 80\/min, and oxygen saturation 99% on room air. Cardiovascular, respiratory, abdominal, and neurological examinations were otherwise unremarkable. Importantly, there was no history of hemoptysis, cough, fever, rash, arthralgia, oral ulcers, gross hematuria, dysuria, or exposure to non\u2011steroidal anti\u2011inflammatory drugs or native medications.<\/p>\n<h2>Investigations<\/h2>\n<p>Initial laboratory evaluation revealed severe azotemia, with a blood urea nitrogen of 110 mg\/dL and serum creatinine of 6.98 mg\/dL compared with her baseline of 0.9 mg\/dL. Serum sodium was 123 mmol\/L and potassium 4.5 mmol\/L. Hemoglobin was 8.3 g\/dL, with leukocytosis (19,160\/\u00b5L) and thrombocytosis (6.69 lakh\/\u00b5L). In view of the rapid deterioration in renal function, oliguria progressing to anuria, and clinical evidence of volume overload, RPGN was considered the principal clinical syndrome.<\/p>\n<p>Serological evaluation revealed preserved complement levels (C3 106 mg\/dL, C4 23 mg\/dL). Antinuclear antibody and ANCA were negative. Anti\u2011GBM antibody was markedly elevated at 151 U\/mL. Blood cultures showed no growth. The combination of rapidly progressive renal failure, negative ANA and ANCA, preserved complement levels, and strongly positive anti\u2011GBM serology raised suspicion of anti\u2011GBM disease. The absence of pulmonary symptoms or clinical evidence of alveolar hemorrhage suggested a renal\u2011limited presentation.<\/p>\n<h2>Biopsy<\/h2>\n<figure style=\"margin-bottom: 25px;\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-11297\" src=\"https:\/\/www.kauveryhospital.com\/ima-journal\/wp-content\/uploads\/2026\/09\/a-case-of-renal\u2011limited-anti\u2011gbm-disease-in-an-elderly-patient-2.jpg\" alt=\"\" width=\"816\" height=\"276\" srcset=\"https:\/\/www.kauveryhospital.com\/ima-journal\/wp-content\/uploads\/2026\/09\/a-case-of-renal\u2011limited-anti\u2011gbm-disease-in-an-elderly-patient-2.jpg 816w, https:\/\/www.kauveryhospital.com\/ima-journal\/wp-content\/uploads\/2026\/09\/a-case-of-renal\u2011limited-anti\u2011gbm-disease-in-an-elderly-patient-2-300x101.jpg 300w, https:\/\/www.kauveryhospital.com\/ima-journal\/wp-content\/uploads\/2026\/09\/a-case-of-renal\u2011limited-anti\u2011gbm-disease-in-an-elderly-patient-2-768x260.jpg 768w\" sizes=\"auto, (max-width: 816px) 100vw, 816px\" \/><\/figure>\n<p>A native renal biopsy performed on the fifth day of admission demonstrated diffuse crescentic glomerulonephritis. Of 39 glomeruli sampled, six were globally sclerosed. Crescents were present in 29 glomeruli, including 15 cellular, two fibrocellular, and 12 fibrous crescents. Fibrinoid necrosis of glomerular tufts was observed, with rupture of Bowman\u2019s capsule, dense lymphohistiocytic inflammation, and focal giant\u2011cell reaction. The four relatively uninvolved glomeruli showed mesangial expansion and proliferation without definite basement membrane thickening or endocapillary hypercellularity. The tubulointerstitium demonstrated diffuse dense mixed inflammation comprising lymphocytes, plasma cells, histiocytes, numerous neutrophils, and occasional eosinophils. Proximal tubules showed neutrophilic casts, intraluminal red blood cells, coarse cytoplasmic vacuolation, and moderate acute tubular injury. Interstitial fibrosis and tubular atrophy involved approximately 10\u201315% of the cortex. Moderate arteriolar hyalinosis and mild fibrointimal thickening of arteries were also noted.<\/p>\n<p>Direct immunofluorescence performed on a core containing seven glomeruli demonstrated strong (3+) linear, ribbon\u2011like staining for IgG and C3 along the glomerular basement membranes. Kappa and lambda light chains showed 2+ linear staining, while IgA, IgM, and C1q were negative. The characteristic diffuse linear deposition of IgG along the GBM, in conjunction with extensive necrotizing crescentic glomerulonephritis and markedly elevated circulating anti\u2011GBM antibody level, was diagnostic of anti\u2011GBM glomerulonephritis. Linear IgG deposition along the GBM is the characteristic immunopathological feature of anti\u2011GBM disease and reflects autoantibody binding to the non\u2011collagenous domain of the \u03b13 chain of type IV collagen.\u00b9,\u00b2<\/p>\n<h2>Diagnosis<\/h2>\n<p>Based on the clinical presentation, serological findings, and renal histopathology, a diagnosis of anti\u2011GBM disease presenting as severe renal\u2011limited crescentic RPGN was established. The absence of hemoptysis, respiratory symptoms, or other evidence of pulmonary hemorrhage indicated an isolated renal phenotype.<\/p>\n<h2>Treatment<\/h2>\n<p>In view of severe renal failure with progressive oliguria\/anuria and volume overload, a right internal jugular double\u2011lumen dialysis catheter was inserted on the second day of admission, and intermittent hemodialysis was initiated. Following confirmation of anti\u2011GBM disease, treatment was planned with disease\u2011directed immunosuppression and plasma exchange. Current guidelines recommend prompt initiation of plasma exchange in combination with glucocorticoids and cyclophosphamide in appropriate patients with active anti\u2011GBM disease, with the objective of removing circulating pathogenic antibodies and suppressing further autoantibody production.\u00b2<\/p>\n<h2>Prognostic Considerations<\/h2>\n<p>The renal biopsy demonstrated extensive glomerular involvement, with crescents in approximately 74% of sampled glomeruli. However, the predominance of cellular rather than fibrous crescents and the relatively limited degree of interstitial fibrosis and tubular atrophy suggested that a component of the renal injury remained potentially reversible. Conversely, the presence of anuria, dialysis dependence at presentation, fibrinoid necrosis, extensive crescent formation, and six globally sclerosed glomeruli represented adverse prognostic features. Renal outcome in anti\u2011GBM disease is strongly influenced by the severity and chronicity of renal injury at presentation, with dialysis dependence and extensive irreversible histological injury being associated with a lower likelihood of renal recovery.\u00b3<\/p>\n<h2>Discussion<\/h2>\n<p>Anti\u2011GBM disease is distinguished histologically by necrotizing crescentic glomerulonephritis and immunopathologically by diffuse linear IgG deposition along the GBM. This pattern distinguishes anti\u2011GBM disease from pauci\u2011immune crescentic glomerulonephritis, in which immunofluorescence shows little or no immune deposition, and from immune\u2011complex crescentic glomerulonephritis, which demonstrates granular immune deposition.\u2074 The present case is notable for the patient\u2019s advanced age, rapid progression from previously normal renal function to dialysis\u2011requiring anuric renal failure, and the absence of pulmonary involvement. The markedly elevated anti\u2011GBM antibody titre and characteristic linear IgG staining on renal biopsy established the diagnosis despite the absence of pulmonary manifestations. The coexistence of cellular, fibrocellular, and fibrous crescents provides evidence of both active and established glomerular injury, while the relatively modest degree of tubulointerstitial fibrosis may have implications for the potential reversibility of renal dysfunction.<\/p>\n<h2>Conclusion<\/h2>\n<p>Renal\u2011limited anti\u2011GBM disease is an important and potentially life\u2011threatening cause of rapidly progressive renal failure in elderly patients. The absence of pulmonary manifestations should not delay consideration of anti\u2011GBM disease. Early recognition through appropriate serological testing and renal biopsy is essential, as prompt initiation of disease<\/p>\n<h2>References<\/h2>\n<p>McAdoo SP, Pusey CD. Anti-glomerular basement membrane disease. Clin J Am Soc Nephrol. 2017;12(7):1162-1172.<\/p>\n<p>Kidney Disease: Improving Global Outcomes (KDIGO) Glomerular Diseases Work Group. KDIGO 2021 Clinical Practice Guideline for the Management of Glomerular Diseases. Kidney Int. 2021;100(4S):S1-S276.<\/p>\n<p>Levy JB, Turner AN, Rees AJ, Pusey CD. Long-term outcome of anti-glomerular basement membrane antibody<\/p>\n<div class=\"row\" style=\"padding-top: 30px;\">\n<div class=\"col-md-2 col-sm-4 col-xs-4 paddingbottom\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-10225\" src=\"https:\/\/www.kauveryhospital.com\/ima-journal\/wp-content\/uploads\/2025\/05\/person-placeholder-female.jpg\" alt=\"\" width=\"700\" height=\"700\" srcset=\"https:\/\/www.kauveryhospital.com\/ima-journal\/wp-content\/uploads\/2025\/05\/person-placeholder-female.jpg 700w, https:\/\/www.kauveryhospital.com\/ima-journal\/wp-content\/uploads\/2025\/05\/person-placeholder-female-300x300.jpg 300w, https:\/\/www.kauveryhospital.com\/ima-journal\/wp-content\/uploads\/2025\/05\/person-placeholder-female-150x150.jpg 150w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/div>\n<div class=\"col-md-10 col-sm-8 col-xs-8 paddingbottom\">\n<p style=\"font-size: 15px;\" align=\"left\"><b>Dr M Tamilaruvi<br \/>\nPostgraduate in Nephrology<br \/>\n<a href=\"https:\/\/www.kauveryhospital.com\/\">Kauvery Hospital, Chennai.<\/a><\/b><\/p>\n<\/div>\n<\/div>\n<div class=\"row\" style=\"padding-top: 30px;\">\n<div class=\"col-md-2 col-sm-4 col-xs-4 paddingbottom\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-10866\" src=\"https:\/\/www.kauveryhospital.com\/ima-journal\/wp-content\/uploads\/2026\/02\/Dr-Balasubramaniam.jpg\" alt=\"\" width=\"400\" height=\"469\" srcset=\"https:\/\/www.kauveryhospital.com\/ima-journal\/wp-content\/uploads\/2026\/02\/Dr-Balasubramaniam.jpg 400w, https:\/\/www.kauveryhospital.com\/ima-journal\/wp-content\/uploads\/2026\/02\/Dr-Balasubramaniam-256x300.jpg 256w\" sizes=\"auto, (max-width: 400px) 100vw, 400px\" \/><\/div>\n<div class=\"col-md-10 col-sm-8 col-xs-8 paddingbottom\">\n<p style=\"font-size: 15px;\" align=\"left\"><b>Dr R Balasubramaniam<br \/>\nChief Nephrologist and Senior Consultant<br \/>\n<a href=\"https:\/\/www.kauveryhospital.com\/\">Kauvery Hospital, Chennai.<\/a><\/b><\/p>\n<\/div>\n<\/div>\n<div class=\"row\" style=\"padding-top: 30px;\">\n<div class=\"col-md-2 col-sm-4 col-xs-4 paddingbottom\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-10883\" src=\"https:\/\/www.kauveryhospital.com\/ima-journal\/wp-content\/uploads\/2026\/02\/dr-r-sangamitra.jpg\" alt=\"Dr R Sangamitra MD\" width=\"852\" height=\"1200\" srcset=\"https:\/\/www.kauveryhospital.com\/ima-journal\/wp-content\/uploads\/2026\/02\/dr-r-sangamitra.jpg 852w, https:\/\/www.kauveryhospital.com\/ima-journal\/wp-content\/uploads\/2026\/02\/dr-r-sangamitra-213x300.jpg 213w, https:\/\/www.kauveryhospital.com\/ima-journal\/wp-content\/uploads\/2026\/02\/dr-r-sangamitra-727x1024.jpg 727w, https:\/\/www.kauveryhospital.com\/ima-journal\/wp-content\/uploads\/2026\/02\/dr-r-sangamitra-768x1082.jpg 768w\" sizes=\"auto, (max-width: 852px) 100vw, 852px\" \/><\/div>\n<div class=\"col-md-10 col-sm-8 col-xs-8 paddingbottom\">\n<p style=\"font-size: 15px;\" align=\"left\"><b>Dr Sangamitra<br \/>\nConsultant Pathologist<br \/>\n<a href=\"https:\/\/www.kauveryhospital.com\/\">Kauvery Hospital, Chennai.<\/a><\/b><\/p>\n<\/div>\n<\/div>\n<p>[\/vc_column_text][\/vc_column][\/vc_row][\/vc_section]<\/p>\n","protected":false},"excerpt":{"rendered":"<p>[vc_section][vc_row][vc_column][vc_column_text] Abstract Anti\u2011glomerular basement membrane (anti\u2011GBM) disease is a rare autoimmune cause of rapidly progressive glomerulonephritis (RPGN). It is characterized by autoantibodies directed against the non\u2011collagenous domain of the \u03b13<\/p>\n","protected":false},"author":2,"featured_media":11298,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[104],"tags":[],"class_list":["post-11296","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ima-journal-september-2026"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>A Case of Renal\u2011Limited Anti\u2011GBM Disease in an Elderly Patient<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.kauveryhospital.com\/ima-journal\/ima-journal-september-2026\/a-case-of-renal-limited-anti-gbm-disease-in-an-elderly-patient\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"A Case of Renal\u2011Limited Anti\u2011GBM Disease in an Elderly Patient\" \/>\n<meta property=\"og:description\" content=\"[vc_section][vc_row][vc_column][vc_column_text] Abstract Anti\u2011glomerular basement membrane (anti\u2011GBM) disease is a rare autoimmune cause of rapidly progressive glomerulonephritis (RPGN). It is characterized by autoantibodies directed against the non\u2011collagenous domain of the \u03b13\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.kauveryhospital.com\/ima-journal\/ima-journal-september-2026\/a-case-of-renal-limited-anti-gbm-disease-in-an-elderly-patient\/\" \/>\n<meta property=\"og:site_name\" content=\"Kauvery Hospital | Patient Newsletters | A Monthly Newsletter from your Partners in Good Health\" \/>\n<meta property=\"article:published_time\" content=\"2026-09-13T14:18:43+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-09-15T05:28:09+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.kauveryhospital.com\/ima-journal\/wp-content\/uploads\/2026\/09\/a-case-of-renal\u2011limited-anti\u2011gbm-disease-in-an-elderly-patient.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1308\" \/>\n\t<meta property=\"og:image:height\" content=\"545\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta 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