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Glomerulonephritis. Brian S. Pavey , DO, MS. Presentation. Sudden onset Hematuria Hypertension Edema Acute kidney injury. Broad Differential Diagnosis. Asymptomatic microscopic or gross hematuria Thin basement membrane nephropathy IgA nephropathy Mesangioproliferative nephropathy
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Glomerulonephritis Brian S. Pavey, DO, MS
Presentation • Sudden onset • Hematuria • Hypertension • Edema • Acute kidney injury
Broad Differential Diagnosis • Asymptomatic microscopic or gross hematuria • Thin basement membrane nephropathy • IgA nephropathy • Mesangioproliferative nephropathy • Alport’s syndrome • Acute Nephritis • Acute proliferative glomerulonephritis • Post-infectious glomerulonephritis • Focal or diffuse proliferative glomerulonephritis • IgA nephropathy • Lupus nephritis • Type I MPGN • Type II MPGN • Fibrillary glomerulonephritis • Rapidly Progressive glomerulonephritis • Pulmonary-renal vasculitic syndrome • Goodpasture (Anti-GBM) syndrome • Immune complex vasculitis • Lupus • Wegener’s granulomatosis • ANCA Vasculitis • Microscopic Polyangiitis • Wegener’s granulomatosis • Churg-Strauss syndrome
Approaching Acute Nephritis • Urinalysis • Hematuria • Proteinuria • Urine microscopy • Dysmorphic RBCs, RBC casts, acanthocytes • Assess 24-hour proteinuria (prot/creat ratio) • Acute phase reactants • ESR, CRP, • Renal Ultrasound
Nephritic Workup • CBC • CMP, Phosphorus • ESR/CRP • Complement C3 and C4 • UA with microscopic evaluation • Quantify proteinuria • Streptozyme (anti-streptolysin O) • Blood culture • ANA • Anti-DS DNA • Hepatitis B & C serologies • ANCA’s • Anti-GBM • UPEP with immunofixation • SPEP with immunofixation • Serum free light chains • Renal ultrasound • ? Chest Xray or CT chest • ? Echocardiogram
Henoch-Schonlein Purpura • Tetrad of HSP • Palpable purpura without thrombocytopenia and coagulopathy • Arthritis/arthralgia • Abdominal pain • Renal disease (of 52 patients in a case series) • Microscopic hematuria in 37 patients (11 percent) • Gross hematuria in 12 patients (5 percent) • Of the 49 patients with hematuria, 28 had proteinuria • Nephrotic syndrome in 2 patients • Isolated proteinuria in 2 patients • Cause unknown, possible autoimmune • Supportive care, typically self-limiting
Cryoglobulinemia • Commonly associated with Hepatitis C infection, can other causes • Can develop into rapidly progressive GN or chronic progressive GN • Treatment aimed at underlying disorder
Thrombotic Thrombocytopenic Purpura • Pentad • Microangiopathic hemolytic anemia • Thrombocytopenia, often with purpura but not usually severe bleeding • Acute Kidney Injury • Altered mental status • Fever is rare • Treatment • Plasma exchange • Immune suppression
Systemic Lupus Erythematosis • Types of Lupus-related kidney damage • Class 1: minimal mesangial lupus nephritis • Class 2: mesangial proliferative lupus nephritis • Class 3: focal lupus nephritis • Class 4: diffuse lupus nephritis • Class 5: membranous lupus nephritis • Class 6: advances sclerosing lupus nephritis
Infective Endocarditis • Four potential causes of kidney damage • Post-infectious immune complex-mediated GN • Drug induced interstitial nephritis • Aminoglycoside induced ATN • Thromboembolic