6. Glomerular Causes of Haematuria Flashcards Preview

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Flashcards in 6. Glomerular Causes of Haematuria Deck (13)
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1
Q

What are the systemic causes of haematuria?

A

Clotting disorders
Low platelets
Warfarin

2
Q

What are the renal causes of haematuria?

A
Glomerulonephritis
Thin membranes
Alport's syndrome
Vasculitis
Neoplasms
3
Q

What is the most common cause of glomerulonephritis?

A

IgA glomerulonephritis

4
Q

How does IgA glomerulonephritis appear on histology?

A

IgA immune complex deposits, especially in mesangium

Recruitment of macrophages

5
Q

What system is used to give the prognosis for IgA glomerulonephritis?

A

Oxford staging system

6
Q

Give the points of the Oxford Staging system

A
Mesangial cellularity increase
Endocapillary inflammation
Segmental sclerosis
Tubulo-interstitial fibrosis
Crescents
7
Q

What is thin membrane nephropathy?

A

Also known as benign familial haematuria

Females may be carriers for Alport’s disease

8
Q

What is Alport’s syndrome?

A

Sex linked collagen disease

Causes fragmentation of BM

9
Q

What other abnormalities are associated with Alport’s syndrome?

A

Nerve deafness

Eye abnormalities

10
Q

Describe the pathogenesis of ANCA vasculitis

A

Neutrophils are activated via inflammation
Parts of things they have phagocytosed protrude through cell wall
Antibody binds to MPO or PR3
Neutrophils aggregate and attack endothelial surface

11
Q

How are crescents formed in ANCA vasculitis?

A

Capillary wall rupture means iron released in Bowman’s capsule
Macrophages in capsule try to digest iron

12
Q

What is goodpasture syndrome?

A

IgG autoantibodies to type 4 collagen in BM
more severe than ANCA
Destroys BM so that blood can pass from capillary right into Bowman’s

13
Q

What are the urinary tract causes of haematuria?

A
Carcinoma: ureter, bladder or prostate
UTI or STD
Calculi
Urethral caruncle
Catheters
Benign hyperplasia of the prostate