glomerulonephritis Flashcards

1
Q

what is glomerulonephritis

A

immune-mediated disease of the kidneys affecting the glomeruli

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2
Q

what cells surround the capillaries

A

podocytes

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3
Q

what can disruption of the capillary wall cause

A

haematuria and/or proteinuria

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4
Q

what type of lesion does damage to endothelial or mesangial cells lead to

A

proliferative lesion and red cells in urine

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5
Q

what does damage to podocytes lead to

A

non-proliferative lesion and protein in urine

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6
Q

what happens when endothelial cells are attacked

A

vasculitis

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7
Q

diagnosis of GN

A
  • clinical presentation
  • blood tests
  • examine urine (urinalysis, urine microscopy etc)
  • kidney biopsy
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8
Q

presentation of GN

A
  • haematuria
  • proteinuria/albuminuria
  • AKI/CKD
  • hypertension
  • nephrotic and nephretic syndrome
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9
Q

what is nephretic syndrome

A
  • acute decline in kidney function
  • oliguria
  • oedema caused by fluid retention
  • hypertension
  • active urinary sediment
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10
Q

what is nephrotic syndrome

A
  • proteinuria
  • hypoalbuminaemia
  • oedema
  • hypercholesterolaemia
  • usually normal renal function
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11
Q

complications of nephrotic syndrome

A
  • infections
  • renal vein thrombosis
  • pulmonary emboli
  • volume depletion may lead to AKI
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12
Q

two types of GN

A

primary - autoimmune

secondary - caused by infection or drugs, or part of a systemic disease

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13
Q

what does it mean if GN is crescentic

A

presence of crescents - extracapillary proliferation of inflammatory cells within Bowman’s space

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14
Q

non-immunosuppressive treatment of GN

A
  • anti-hypertensive
  • ACE inhibitors/ARBs
  • SGLT2i
  • diuretics
  • statins
  • anticoagulants in nephrotic with hypoalbuminaemia
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15
Q

immunosuppressive treatment of GN

A
  • corticosteroids
  • alkylating agents
  • calcineurin inhibitors
  • anti-proliferatives
  • plasmapheresis
  • IV immunoglobin
  • monoclonal antibodies
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16
Q

treatment of nephrotic patients

A
  • fluid restriction
  • salt restriction
  • diuretics
  • ACE inhibitors/ARBS
  • consider anticoagulation
  • IV albumin (only if volume deplete)
  • statins
17
Q

what are the different types of primary GN

A
  • minimal change
  • FSGS
  • membranous
  • membranoproliferative
  • IgA nephropathy
18
Q

features of minimal change nephropathy

A
  • children
  • only seen on electromicroscopy
  • oral steroids treatment
  • cyclophosphamide for steroid resistant
  • doesn’t cause progressive renal failure
19
Q

what is FSGS

A

focal segmental glomerulosclerosis

  • commonest cause in adults
  • primary, secondary or genetic
  • medium response to steroids (60%)
20
Q

secondary causes of membranous nephropathy

A
  • infections
  • connect tissue diseases (lupus)
  • malignancies
  • drugs (gold/penicilliamine)
21
Q

what is seen on renal biopsy in membranous nephropathy

A

subepithelial immune complex deposition in the basement membrane

22
Q

features of IgA nephropathy

A
  • commonest in world
  • asymptomatic microhaematuria +/- non-nephrotic range proteinuria
  • macroscopic haematuria after resp/GI infection
  • can cause AKI/CKD
23
Q

what disease is IgA nephropathy associated with

A

henoch-Schonlein purpura

24
Q

treatment for IgA nephropathy

A
  • BP control
  • ACEis and ARBs
  • fish oil
25
Q

how quick is the deterioration in rapidly progressive glomerulonephritis

A

days/weeks

26
Q

what can RPGN be divided into

A

ANCA positive and ANCA negative

27
Q

ANCA positive types of RPGN

A
  • granulomatosis with polyangiitis

- microscopic polynagitis

28
Q

ANCA negative RPGN

A
  • goodpasture’s/ANti-GBM disease
  • Henoch Sholein purpura/IgA
  • systemic lupus erythematosus
29
Q

treatment for RPGN

A

IMMUNOSUPPRESSION

  • steroids and cytotoxics or anti B cell antibody
  • steroids and azathioprine as maintenance for at least years to prevent relapse