Goodpasture Syndrome

Admit patients with suspected diffuse alveolar hemorrhage and rapidly progressive glomerulonephritis to a monitored setting; transfer to intensive care when hypoxemia, respiratory failure, or hemodynamic instability is present. Intubate for respiratory failure and initiate urgent hemodialysis for standard indications rather than waiting for diagnostic confirmation. PubMedPubMedGoodpasture Syndrome - StatPearls - NCBI Bookshelf - NIH

The key actionable syndrome is pulmonary hemorrhage with glomerulonephritis: Goodpasture syndrome denotes anti-GBM disease with hemorrhagic pneumonitis, whereas anti-GBM disease can be renal-limited. Rapid loss of kidney function with active urinary abnormalities and diffuse pulmonary infiltrates should trigger an immediate anti-GBM-centered workup. BMJ+3BMJAnti-glomerular basement membrane (Goodpasture's) disease - Symptoms, diagnosis and treatment | BMJ Best PracticeacpjournalsVariant "Goodpasture's Syndrome"?: The Need for ...ScienceDirectGoodpasture Syndrome - an overviewPubMedAn Unusual Case of Anti-GBM Antibody Elevation in HIV-Associated Nephropathy - PMC

Do not use hemoptysis alone to exclude alveolar hemorrhage. Pulmonary hemorrhage may be clinically apparent or detected by imaging, pulmonary function testing, or bronchoscopy; evaluate the pulmonary process while simultaneously documenting kidney involvement with serum creatinine and urinalysis. Wolters KluwerWolters KluwerAntiglomerular Basement Membrane Disease : Seminars in Respiratory & Critical Care Medicine

Anti-GBM disease is mediated by autoantibodies directed predominantly against the noncollagenous domain of the alpha-3 chain of type IV collagen in glomerular and alveolar basement membranes. The clinically decisive consequence is capillaritis presenting as rapidly progressive glomerulonephritis, pulmonary hemorrhage, or both. BMJ+3BMJAnti-glomerular basement membrane (Goodpasture's) disease - Symptoms, diagnosis and treatment | BMJ Best PracticeScienceDirectGoodpasture Syndrome - an overview | ScienceDirect TopicsWolters KluwerAntiglomerular Basement Membrane Disease : Seminars in Respiratory & Critical Care MedicinePubMedGoodpasture Syndrome - StatPearls - NCBI Bookshelf - NIH

Use a circulating anti-GBM antibody assay as the rapid diagnostic test in a compatible syndrome. Meta-analytic data cited in a recent case report estimate 93% sensitivity and 97% specificity for anti-GBM antibody detection; approximately 90% of affected patients have serum antibodies detectable by ELISA. A negative assay therefore lowers probability but does not exclude disease when the clinical trajectory and renal pathology are compelling. Wiley+1WileyAntibody‐Negative Relapse of Goodpasture Syndrome with Pulmonary Hemorrhage - Rohm - 2019 - Case Reports in Medicine - Wiley Online LibraryPubMedAnti-GBM disease with positive serum anti-GBM antibodies but negative IgG deposition: A case report - PMC

Kidney biopsy is the key adjudicating test when diagnosis is uncertain, antibodies are negative, or an atypical course suggests an alternative process. The defining immunofluorescence finding is continuous linear IgG staining along glomerular basement membranes, usually accompanied by diffuse necrotizing and crescentic glomerulonephritis. Crescent formation is reported in 95% of biopsy series, and more than 50% of glomeruli are affected in approximately 80% of cases. ScienceDirect+2ScienceDirectGoodpasture Syndrome - an overviewPubMedAnti-GBM disease with positive serum anti-GBM antibodies but negative IgG deposition: A case report - PMCPubMedAtypical anti-glomerular basement membrane disease - PMC

Interpret ANCA positivity as an overlap phenotype rather than a reason to dismiss anti-GBM disease. ANCA is present in 30% to 40% of anti-GBM cases; because isolated anti-GBM disease rarely relapses but ANCA-associated disease does, dual-positive patients require a maintenance-immunosuppression plan after induction. Wolters KluwerWolters KluwerAntiglomerular Basement Membrane Disease : Seminars in Respiratory & Critical Care Medicine

For suspected anti-GBM disease with rapidly progressive glomerulonephritis and/or pulmonary hemorrhage, initiate plasma exchange with glucocorticoids and cyclophosphamide promptly in coordination with nephrology. This combination is the established treatment approach: plasma exchange removes pathogenic circulating anti-GBM antibodies, cyclophosphamide suppresses ongoing antibody production, and glucocorticoids suppress end-organ inflammation. Wolters Kluwer+3Wolters KluwerAntiglomerular Basement Membrane Disease : Seminars in Respiratory & Critical Care MedicineWileyPlasma Exchange for Anti‐GBM Disease With Dialysis ...PubMedGoodpasture Syndrome - StatPearls - NCBI Bookshelf - NIHpublications aapImmunoadsorption in Anti-GBM Glomerulonephritis: Case ...

Do not delay treatment solely for biopsy confirmation when the clinical probability is high and organ injury is progressing. Serologic results may take several days, while early diagnosis and treatment are emphasized to prevent irreversible renal failure and life-threatening pulmonary complications. Obtain renal tissue as soon as the patient can safely undergo biopsy. Wiley+1WileyAntibody‐Negative Relapse of Goodpasture Syndrome with Pulmonary Hemorrhage - Rohm - 2019 - Case Reports in Medicine - Wiley Online LibraryPubMedGoodpasture Syndrome - StatPearls - NCBI Bookshelf - NIH

Plasma exchange is central for anti-GBM disease, unlike ANCA-associated vasculitis where recommendations are more selective. In AAV, plasma exchange may be considered for rapidly progressive glomerulonephritis with serum creatinine at least 5.7 mg/dL or severe diffuse alveolar hemorrhage; this threshold is an AAV recommendation and should not be substituted for the anti-GBM treatment strategy. BMJ+1BMJEULAR/ERA-EDTA recommendations for the management ...Wolters KluwerAntiglomerular Basement Membrane Disease : Seminars in Respiratory & Critical Care Medicine

Use hemodialysis as supportive renal replacement for standard indications, not as a substitute for disease-directed induction. Renal prognosis is strongly linked to severity at presentation: independent renal function at 1 year is maintained in more than 80% of aggressively treated patients who did not require renal replacement therapy initially. Wolters Kluwer+1Wolters KluwerAntiglomerular Basement Membrane Disease : Seminars in Respiratory & Critical Care MedicinePubMedGoodpasture Syndrome - StatPearls - NCBI Bookshelf - NIH

Monitor clinical pulmonary status, oxygen requirement, serum creatinine, and urinary findings during induction to determine whether hemorrhage and glomerular injury are responding. Anti-GBM titers can fall rapidly with plasma exchange, but treatment response must be judged against organ-level improvement because kidney injury may already be irreversible. BMJ+1BMJGoodpasture syndrome: a rare case presenting with recurrent haemoptysis | BMJ Case ReportsWolters KluwerAntiglomerular Basement Membrane Disease : Seminars in Respiratory & Critical Care Medicine

For isolated anti-GBM disease, relapse is uncommon after effective induction. In contrast, dual anti-GBM/ANCA positivity requires maintenance immunosuppression because the ANCA-associated component confers relapse risk; ensure ANCA results are reviewed before finalizing the post-induction plan. Wolters KluwerWolters KluwerAntiglomerular Basement Membrane Disease : Seminars in Respiratory & Critical Care Medicine

Counsel patients to eliminate exposures linked to disease onset, particularly tobacco and hydrocarbon solvents. Smoking and hydrocarbon exposure are reported environmental precipitants in genetically susceptible individuals and are particularly relevant in a syndrome involving alveolar-capillary injury. ScienceDirect+1ScienceDirectGoodpasture Syndrome - an overview | ScienceDirect TopicsPubMedGoodpasture Syndrome - StatPearls - NCBI Bookshelf - NIH