nephrotic syndrome & gn ebadur rahman frcp (edin),fasn, specialty certificate in nephrology(uk)...
DESCRIPTION
Presentation New-onset oedema Initially periorbital or peripheral Later genitals, ascites, anasarca Frothy urine Generalised symptoms – lethargy, fatigue, reduced appetiteTRANSCRIPT
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Nephrotic syndrome & GN
Ebadur RahmanEbadur RahmanFRCP (Edin),FASN, Specialty Certificate in FRCP (Edin),FASN, Specialty Certificate in
Nephrology(UK)Nephrology(UK)MRCP(UK),DIM(UK),DNeph(UK),MmedSciNephrologMRCP(UK),DIM(UK),DNeph(UK),MmedSciNephrolog
y(UK).y(UK).Consultant & clinical tutorConsultant & clinical tutorDepartment of NephrologyDepartment of NephrologyRiyadh Armed Forces HospitalRiyadh Armed Forces Hospital
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Nephrotic syndrome This is characterized by proteinuria
(Typically > 3.5g/24h), hypoalbuminemia ( less than 30g/dL ) and
edema. Hyperlipidaemia.
“nephrotic range” –nephrotic proteinuria
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Presentation New-onset oedema
Initially periorbital or peripheral Later genitals, ascites, anasarca
Frothy urine Generalised symptoms – lethargy,
fatigue, reduced appetite
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Figure 1. Nephrotic edema.
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Heavy proteinuria (albuminuria)
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Further possible presentations... Oedema BP Leukonychia Breathlessness:
Pleural effusion, fluid overload, AKI,PE,MI. DVT Eruptive xanthomata/ xanthalosmata
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Hemoconcentration Immobility, especially in patients with
anasarca thrombocytosis, increased platelet
activation, decreased levels of
antithrombin, free protein S, and plasminogen (due to urinary losses),
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NEPHROTIC SYNDROMENEPHROTIC SYNDROME
- Secondary - Primary glomerular Primary glomerular diseasedisease
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Primary glomerular diseasePrimary glomerular disease
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PRIMARY NEPHROTIC SYNDROMEPRIMARY NEPHROTIC SYNDROME
Minimal Change Disease- commonest in children
Focal Segmental Glomerulosclerosis Membranous Nephropathy- commonest
in adult Membranoproliferative
Glomerulonephritis(MPGN) Iga nephropathy RARE to cause
nephrotic syndrome but commonest GN
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For exam Minimal change gn Membranous gn Amiloidosis SLE DM
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Urine dipstick The urine sediment (or direct counting
of RBC per mL of uncentrifuged urine) is the gold standard for the detection of microscopic hematuria.
Dipsticks for heme detect 1 to 2 RBCs per high power field
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false positive tests due to the following: Semen is present in the urine after
ejaculation and may cause a positive heme reaction on the dipstick [
urine pH greater than 9 or contamination with oxidizing agents used to clean the perineum
The presence of myoglobinuria
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False negative tests have been reported in patients
ingesting large amounts of vitamin C
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Isolated glomerular hematuria Renal biopsy is not usually performed there is no specific therapy for these conditions renal prognosis is excellent management of these patients is not usually
affected by the biopsy When renal biopsy is performed in such
patients, the most common findings-are a normal biopsy IgA nephropathy, Thin basement membrane disease (benign familial
hematuria), mild nonspecific glomerular abnormalities, Alport syndrome
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All patients should have a urine culture to exclude infection prior to evaluation of hematuria.
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Hyperlipidemia
total cholesterol and low-density lipoprotein (LDL)
Lipoprotein (a) [Lp(a)]
high-density lipoprotein (HDL) cholesterol .
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Renal biopsy Nephrotic syndrome Nephritic syndrome Unexplained renal impairement Vasculitis where kidneys are commonly involved Renal allograft dysfunction
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Percutaneous renal biopsy is generally contraindicated in the following settings:
Uncorrectable bleeding diathesis Small kidneys which are generally indicative
of chronic irreversible disease Severe hypertension, which cannot be
controlled with antihypertensive medications Multiple, bilateral cysts or a renal tumor Hydronephrosis Active renal or perirenal infection An uncooperative patient
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Table 4
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The clinical findings at presentation in adultsProteinuria – nephrotic rangeHematuria – 29 percentHypertension – 43 percentAcute renal failure – 18 percent
In children- diagnosis of MCD is usually made based upon the clinical. Almost all children with MCD respond to a short course of glucocorticoids. it is considered steroid-resistant (SR-NS) when no remission is achieved after about two months of full-dose steroid therapy. Pediatricians usually restrict renal biopsy to individuals with SR-NS
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PRIMARY NEPHROTIC SYNDROMEPRIMARY NEPHROTIC SYNDROME
Minimal Change Disease Focal Segmental
Glomerulosclerosis Membranous Nephropathy Membranoproliferative
Glomerulonephritis(MPGN)
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Figure 6. Light microscopic appearances in focal segmental glomerulosclerosis. Segmental scars with capsular adhesions in otherwise normal glomeruli.
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Table 5
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PRIMARY NEPHROTIC SYNDROMEPRIMARY NEPHROTIC SYNDROME
Minimal Change Disease Focal Segmental Glomerulosclerosis Membranous Nephropathy Iga nephropathy Membranoproliferative
Glomerulonephritis(MPGN)
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Membranous nephropathy (MN) - one-third of biopsy diagnoses in adult nondiabetics diffuse thickening of the glomerular basement
membrane (GBM) on light microscopy, "spikes" on silver stain, diffuse granular IgG and complement deposition on immunofluorescence, and subepithelial dense deposits on electron microscopy
Antibodies to the M-type phospholipase A2 receptor (PLA2R ) are found in a high proportion of patients with primary (idiopathic) MN.
Most patients with MN present with the nephrotic syndrome with normal or near normal serum creatinine.
10% associated with malignancy
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Table 6
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Figure 7a. Early MN: a glomerulus from a patient with severe nephrotic syndrome and early MN, exhibiting normal architecture and peripheral capillary basement membranes of normal thickness (Silver–methenamine ×400).
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Figure 7b morphologically advanced MN
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Figure 7c. Morphologically more advanced MN (same patient as in (b))
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IgA nephropathy most common cause of primary
glomerulonephritis. in Asians and Caucasians. There is a 2:1 male to female predominance IgA nephropathy is characterized by prominent,
globular deposits of IgA in the mesangium on immunofluorescence microscopy.
Electron microscopy shows dense deposits primarily in the mesangium
Most patients with IgA nephropathy present with either visible hematuria (single or recurrent), usually following an upper respiratory infection, or invisible hematuria with or without mild proteinuria incidentally detected on a routine examination
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40 to 50 percent present with one or recurrent episodes of visible hematuria, usually following an upper respiratory infection
Another 30 to 40 percent have microscopic hematuria and usually mild proteinuria, and are incidentally detected on a routine examination
Less than 10 percent present with either nephrotic syndrome or rapidly progressive glomerulonephritis
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A kidney biopsy only protein excretion above 0.5 to 1 g/day,
elevated serum creatinine concentration, or hypertension.
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PRIMARY NEPHROTIC SYNDROMEPRIMARY NEPHROTIC SYNDROME
Membranoproliferative Glomerulonephritis(MPGN)
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Figure 8. Pathology of membranoproliferative glomerulonephritis type I.
(a) Light microscopy shows a hypercellular glomerulus with accentuated lobular architecture and a small cellular crescent (methenamine silver).
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Table 7
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Diagnosis
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fasting blood sugar and glycosylated hemoglobin antinuclear antibody test serum complement, In selected patients, cryoglobulins, hepatitis B
and C serology, anti-neutrophil cytoplasmic antibodies (ANCAS), anti GBM antibodies, renal biopsy to define the pattern of glomerular
involvement.
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Complications
Infection Coagulation disorders Protein malnutrition and dyslipidemia Acute renal failure
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Treatment1. General treatment
1. Relief edema2. Rx Htn
2. Symptomatic treatment Treating dyslipidemias, anticoagulate treatment,
3. Immunosupressive treatment