Goodpasture syndrome laboratory findings: Difference between revisions
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==Overview== | ==Overview== | ||
Laboratory findings consistent with the diagnosis of Goodpasture syndrome include, elevated blood urea nitrogen, low-grade proteinuria, leukocytosis, gross or microscopic hematuria, and red cell casts. | Laboratory findings consistent with the diagnosis of Goodpasture syndrome include, anti-glomerular basement membrane antibodies elevated blood urea nitrogen, low-grade proteinuria, leukocytosis, gross or microscopic hematuria, and red cell casts. | ||
==Laboratory Findings== | ==Laboratory Findings== | ||
Laboratory findings consistent with the diagnosis of Goodpasture syndrome include, anti-glomerular basement membrane | Laboratory findings consistent with the diagnosis of Goodpasture syndrome include, anti-glomerular basement membrane antibodies, elevated blood urea nitrogen, low-grade proteinuria, leukocytosis, gross or microscopic hematuria, and red cell casts. If laboratory findings do not show anti-glomerular basement membrane antibodies, a test for anti-neutrophil cytoplasmic antibodies should be made to determine possible cause of ANCA associated vasculitis. Routine laboratory test that may be ordered to help in identifying the cause are: | ||
===Blood Work-up=== | ===Blood Work-up=== | ||
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===Renal Biopsy=== | ===Renal Biopsy=== | ||
Renal biopsy is the | Renal biopsy is the gold standard in establishing Goodpasture syndrome. As it can help establish the detection of circulating anti-glomerular basement membrane antibodies. It is of note that a renal biopsy is best over a pulmonary biopsy because of abundance of autofluorecene. Renal biopsy reveals early focal proliferative changes that present with necrosis, crescent formation, and inflammation of the interstitial under light microscopy. Under direct immunofluorescence, linear immunoglobulin G (IgG) deposits are seen encompassing the glomerular basement membrane and at times the distal tubular portion. | ||
Revision as of 14:59, 4 November 2016
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]Ali Poyan Mehr, M.D. [2]Associate Editor(s)-in-Chief: Krzysztof Wierzbicki M.D. [3]
Overview
Laboratory findings consistent with the diagnosis of Goodpasture syndrome include, anti-glomerular basement membrane antibodies elevated blood urea nitrogen, low-grade proteinuria, leukocytosis, gross or microscopic hematuria, and red cell casts.
Laboratory Findings
Laboratory findings consistent with the diagnosis of Goodpasture syndrome include, anti-glomerular basement membrane antibodies, elevated blood urea nitrogen, low-grade proteinuria, leukocytosis, gross or microscopic hematuria, and red cell casts. If laboratory findings do not show anti-glomerular basement membrane antibodies, a test for anti-neutrophil cytoplasmic antibodies should be made to determine possible cause of ANCA associated vasculitis. Routine laboratory test that may be ordered to help in identifying the cause are:
Blood Work-up
- Complete blood count (CBC)
- Uremia
- Serum creatinine
- Blood urea nitrogen (BUN)
- Anti-glomerular basement membrane test
- Anti-neutrophil cytoplasmic antibody test
Urinalysis
- Proteinuria
- Hematuria
- Red cell casts
Renal Biopsy
Renal biopsy is the gold standard in establishing Goodpasture syndrome. As it can help establish the detection of circulating anti-glomerular basement membrane antibodies. It is of note that a renal biopsy is best over a pulmonary biopsy because of abundance of autofluorecene. Renal biopsy reveals early focal proliferative changes that present with necrosis, crescent formation, and inflammation of the interstitial under light microscopy. Under direct immunofluorescence, linear immunoglobulin G (IgG) deposits are seen encompassing the glomerular basement membrane and at times the distal tubular portion.