Glomerulonephritis Flashcards
How does blood enter the glomerulus via?
Afferent arteriole
How does blood leave the glomerulus?
Via efferent arteriole
What will not be filtered at the glomerulus?
All proteins equal to or larger than albumin
What are the 3 layers barrier of the glomerulus?
Endothelial cell cytoplasma
Basal lamina
Podocyte
What are mesagnial cells?
Group of cells which support the capillaries
What is glomerulonephritis?
Disease of glomerulus
Either inflammatory or non-inflammatory
What are the potential aetiologies of glomerulonephritis?
Immunoglobulin deposition Non-immunoglobulin deposition Autoimmune Infection Malignancy Drugs
What are the 2 classifications of glomerulonephritis?
Proliferative
Non-proliferative
What is diffuse glomerulonephritis?
When >50% of glomerulus is affected
What is focal glomerulonephritis?
When <50 % affected
What is global glomerulonephritis?
When all glomeruli are affected
What is segmental glomerulonephritis?
When part of the glomerulus is affected
What is the common presentation of nephritic disease?
Haematura
Light proteinuria
Low urine volume
Hypertensive
What is the common presentation of nephrotic disease?
Heave proteinuria
Oedema
Hyperlipidaemia
What are the main causes of haematuria?
UTI
UT stone
UT tumour
Glomerulonephritis
What are the primary causes of nephritic disease?
Post streptococcal glomerulonephritis
IgA nephropathy
Crescentic glomerulonephritis
What are the primary causes of nephrotic snydrome
Minimal change syndrome
Focal and segmental glomerulosclerosis
Membramous nephropathy
What is the most common cause of glomerulonephritis in adults?
IgA nephritis
What are the clinical feature of IgA nephropathy?
Discolouration of urine
Microscopic haematuria
Nephritis syndrome
Urine culture and USS normal
What are the investigations for IgA nephritis
Urine culture
USS normal
Bloods
Renal biopsy
What is the pathology of IgA nephritis?
IgA deposits in mesangial matrix causing increased proliferation of mesangial cells
• more matrix is produced also
Excess IgA is sometimes presenting the serum
IgA becomes “stuck” in mesangium and becomes clogged with antibody
What is the prognosis for IgA nephritis?
Usually self limiting
However some do go on to develop chronic renal failure
What is membranous glomerulonephritis?
Nephrotic syndrome
Where there is abnormality of the glomerular filter
and a thickened glomerular basement membrane
What are the clinical features of membranous glomerulonephritis?
Generally unwell Swollen legs Low serum albumin Heavy proteinuria That of nephrotic syndrome
What causes membranous glomerulonephritis?
Abnormality of glomerular filter
Thickened basement membrane
Deposits of IgG
Stuck in membrane between basal lamina and podocyte
What is activated with deposition of IgG in membranous glomerulonephritis?
Complement C3