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Dr. Belz - Glomerular disease
Belz lecture on glomerular disease
29
Medical
Professional
12/02/2012

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Term
Glomerulonephritis
Definition
Hematuria - RBC casts and dysmorphic RBCs
Lipiduria
Proteinuria
Rapidly progressive renal failure
Term
Asymptomatic hematuria
Definition
Common- 5-10% of population
Glomerular disease with no proteinuria
Hematuria, minimal proteinuria and low Cr on renal biopsy
Term
3 most common lab findings on biopsy in asymptomatic proteinuria
Definition
normal
thin basement membrane nephropathy
IgA nephropathy
Term
Cellular crescents
Definition
indicative of rapidly progressive glomerulonephritis
Proliferation of parietal epithelial cells
Term
Rapidly Progressive (Crescenic) Glomerulonephritis
Definition
Medical emergency
Renal failure
oliguria
edema
HTN
Proteinuria
hematuria - active sedement
Term
Causes of Crescenic Glomerulonephritis
Definition
Direct immunoglobulin attack
Immune complex deposition
Pauci-immune
Term
Anti-GBM disease (Goodpasture syndrome)
Definition
Linear deposits of IgG in the glomerular basement membrane
Can also affect the lungs
Term
Post infectious Glomerulonephritis
Definition
Most common cause of acute GN worldwide
In situ immune complex formation to to glomerular desposition of streptococcal nephritogenic antigens
Term
Post infectious GN - clinical characteristics
Definition
Hx of group A strep infections
Latent period of a few weeks
edema
gross hematuria
HTN
Term
Post infectious GN - lab findings
Definition
Hematuria with and without RBC casts
Proteinuria
depressed C3 and CH50 complement activity
Elevated antibody titers to extracellular strep antigens
Term
Pauci-immune causes of crescenic glomerular nephritis
Definition
Wegener granulomatosis
Churg-Strass syndrome
Microscopic polyarteritis
Term
Nephrotic Syndrome
Definition
Massive proteinuria (3 g/24 hr/1/73 m^2)
Hypoproteinemia/hypoalbuminemia
Edema
Hyperlipidemia
Lipiduria
Term
Primary Nephrotic Syndrome
Definition
Minimal change disease
Focal segmental glomerulosclerosis
Membranous glomerulopathy
Term
Secondary Nephrotic Syndrome
Definition
Diabetic glomerulopathy
Amyloidosis
Term
Diabetic glomerulopathy
Definition
Nodular mesangial expansion - kimmelstiel wilson nodules
Most common primary diagnosis for pts with ESRD
CV disease is the leading cause of death among pts with diabetes on dialysis
Microalbuminuria is the fist clinical sign of diabetic damage to the kidney
Term
Most common primary diagnosis for pts with ESRD
Definition
Diabetes
Term
Leading cause of death among pts with diabetes on dialysis
Definition
CV disease
Term
First clinical sign of diabetic damage to the kidney
Definition
Microalbuminuria
Term
Primary amyloidosis
Definition
Hematologic response correlates with renal response
Term
Secondary amyloidosis
Definition
Also known as reactive amyloidosis
Occurs in pts with chronic inflammation
often progresses to ESRD
Term
Acute Tubular Necrosis (ATN)
Definition
Renal failure phase is typically 1-3 weeks but can very depending on initial insult
Renal recovery not guaranteed
Increased risk for developing chronic kidney disease
brown granular casts are seen
Term
Brown granular casts
Definition
associated with ATN
Term
ATN - causes
Definition
Surgery, Sepsis, bleeding (anything causing hypotension)
Aminoglycosides, Rhabdo, contrast, cisplatin
Term
Acute interstitial nephritis
Definition
Non-specific symptoms of acute renal failure
Oliguria
Malaise
anorexia
N + V
Classic traid of low-grade fever, skin rash and arthralgias seen in 1/3 of pts
Term
Acute interstitial nephritis - lab findings
Definition
Elevation in BUN and Cr
Abnormal UA - eosinophiluria
Eosinophilia
Renal biopsy is the gold standard for Dx
Term
Acute Interstitial Nephritis - pathological features
Definition
Infiltration of inflammatory cells within the renal interstitium
Interstital edema in the kidney
Glomeruli and blood vessels are usually spared
Term
Causes of Acute interstitial nephritis
Definition
Drug induced - antibiotics and NSAIDS
Infection associated
cases associated with autoimmune idiopathic lesions - anti-tubule basement membrane disease, TINU syndrome
Term
Chronic interstitial nephritis
Definition
Slowly progressive chronic renal insufficiency
UA - either normal or sterile pyuria
mild proteinuria
HTN and anemia with moderate to advanced disease
Term
Chronic interstitial nephritis - pathological features
Definition
atrophy of tubular cells with flattened epithelial cells and tubule dilation
Interstitial fibrosis
Areas of cellular infiltration within the interstitial compartment and between the tubules
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