Renal Flashcards
what is the urine sodium in pre-renal AKI
<20
what is the urine osmolality in ATN?
<350
what is seen on renal biopsy of ARPKD
multiple cylindrical lesions
What defect is present in Alport’s syndrome
Type IV collagen
What are the ocular complications of Alport’s syndrome
lenticonus, corneal ulceration, retinitis pigmentosa, cataracts
What is seen on microscopy in Alport’s syndrome
Splitting of the lamina densa
What is significant proteinuria in non-diabetics?
ACR >30mg/mmol
What is significant proteinuria in diabetics?
ACR >2.5mg/mmol (3.5 in women) indicates clinically significant microalbuminaemia
What type of hypersensitivity is hyperacute renal transplant rejection?
Type II
What is the mechanism of acute graft rejection?
cytotoxic T cells
What viral infection is most significant in transplant patients?
CMV
Which renal pathology occurs most frequently to cause chronic graft rejection?
Membranoproliferative GN
What kidney disease is a heroin user likely to develop?
Focal segmental glomerulosclerosis
What does gold exposure cause in the kidneys
membranous glomerulonephritis
What is the most common renal disease in SLE
Diffuse proliferative glomerulonephritis
What is the most common renal disease after a streptococcal infection
Diffuse proliferative glomerulonephritis
What gives a ‘tram-track’ appearance on biopsy of the kidney
Type 1 membranoproliferative glomerulonephritis
What is the commonest cause of nephrotic syndrome in adults?
membranous glomerulonephritis
what type of hypersensitivity is goodpastures
type II
What increases the risk of pulmonary haemorrhage in goodpastures
pulmonary oedema, young male, smoking, LRTI, inhaled hydrocarbons
what is seen on lung biopsy in goodpastures
haemosiderin-laden macrophages in alveoli
what is an indication for plasmapheresis in goodpastures
severe haemoptysis
What is seen on renal biopsy in Wegeners granulomatosis
epithelial crescents in Bowmans capsule
What is seen on renal biopsy in Goodpastures
linear IgG deposits
What is seen on microscopy in post-streptococcal glomerulonephritis
wire-loop lesions and humps in subendothelial space
What is the main pathological finding in rapidly progressive glomerulonephritis
fibrinoid necrosis
What is seen on renal biopsy in acute tubulointerstitial nephritis
interstitial oedema with a heavy infiltrate of inflammatory cells
What is the main cause of acute tubulointerstitial nephritis
Drugs
What is eosinophiuria pathognomic of
acute tubulointerstitial nephritis
Which drug can prevent calcium renal stones
thiazide diuretics (increases distal tubular Ca reabsorption)
Which renal stones are radiolucent on Xray
urate, xanthine
Which stones form in proteus and klebsiella infections
struvite (ammonium magnesium phosphate)
Which renal stones are semi opaque on Xray
Cystine
What is the medical treatment of renal stones to aid stone passage
alpha blockers
What is the GS investigation of renal stones
Non contrast CT
Which amino acids are unable to be reabsorbed in cystinuria
cystine, ornithine, lysine, arginine
what is the treatment of cystinuria
d-penicillamine, urinary alkalisation
what is the treatment of homocystinuria
Vit B6, folic acid
What appearance does fibromuscular dysplasia have on angiography
‘string of beads’ appearance
Which drug is contraindicated in renal artery stenosis
ACE inhibitors
What is the most likely cause of flash pulmonary oedema and hypertension in a young patient
fibromuscular dysplasia
What electrolyte abnormalities are seen in type 1 RTA
hypokalaemia, hypercalciuria, hyperphosphaturia
What deficiency gives rise to type 3 RTA
carbonic anhydrase II
What is the mechanism of action of tolvaptan
vasopressin receptor 2 antagonist
How long does it take for an AV fistula to form
6 weeks
What is the likely cause of macroscopic haematuria in coeliac disease
IgA nephropathy
Which one of the following types of glomerulonephritis is most characteristically associated with partial lipodystrophy
Mesangiocapillary glomerulonephritis (membranoproliferative)
where does spironolactone act
cortical collecting duct
What electrolyte abnormalities cause nephrogenic diabetes insipidus
hypokalaemia, hypercalcaemia
Where does most of Na reabsorption take place?
Via active transport in the loop of Henle
What does HSP show on renal biopsy
Mesangial hypercellularity
Which antibody is idiopathic membranous glomerulonephritis related to?
Anti-phospholipase A2 antibodies
What would a renal biopsy show in IgA nephropathy?
Mesangial hypercellularity
+ positive immunoflourescence for IgA and C3
Which chromosome does 85% of mutations occur in ADPKD?
Chromosome 16
15% occur on Chr 4
What condition creates a ‘spike and dome’ appearance on electron microscopy due to deposits of IgG and C3
Membranous glomerulonephritis
What is the most common extra-renal manifestation in ADPKD
hepatic cysts (causing hepatomegaly)
What immunoglobulins are responsible for hyperacute graft rejection
IgG (pre-existent antibodies)
Which organs are affected in VHL syndrome
Intracranial (CNS haemangioblastoma), eye (retinal haemangiomata) and renal (phaeochromocytoma, renal cell ca, renal cysts)
What is the first stage of diabetic nephropathy
Hyperfiltration - raised GFR
Which condition is associated with Kinmelsteil-Wilson nodules
Diabetic nephropathy
Which kind of renal stones are associated with renal tubular acidosis
Calcium phosphate stones
What is the diagnostic test for homocystinuria
Cyanide nitroprusside test
What is the treatment of renal vascular disease
Stop ACEi, start aspirin and statin
Where does renal cell carcinoma arise from
Proximal renal tubular epithelium
Which cancer is associated with Beckwith-Wiedemann syndrome and WAGR syndrome
Wilm’s tumour
What is the most common organism that causes peritoneal dialysis peritonitis
Coagulase negative staph
What is the treatment of peritoneal dialysis peritonitis
IP vancomycin +/- PO ciprofloxacin
Which condition is characterised by raised phenylalanine and musty odour
PKU
What is the most common type of bladder cancer
Transitional cell carcinoma
Which causes of CKD show enlarged kidneys on imaging
Amyloidosis, PKD, diabetic glomerulosclerosis, scleroderma, RPGN
Where is renin secreted
Renal juxtaglomerular cells
Which cells are damaged in nephrotic syndrome
Podocytes, can also be due to basement membrane damage
Which causes of nephritic syndrome have a normal C3 level
IgA nephropathy, HSP
Which renal disease is seen in Hodgkin’a lymphoma
Minimal change disease
Which type of membranoproliferative GN is associated with low C4
Type 1 (cryoglobulinaemia, HCV)
Which type of membranoproliferative GN is associated with low C3
Type 2 (partial lipodystrophy)
Which ethnicity has the highest prevalence of BPH
Black
What is the screening test for ADPKD
Renal USS
What are stag-horn calculi composed of
Struvite
What type of anti-androgen therapy is bicalutamide
Non-steroidal anti-androgen (blocks androgen receptor)
What is the MOA of cyproterone acetate in treatment of prostate cancer
Steroidal anti-androgen
What is the MOA of abiraterone in treatment of prostate cancer
Androgen synthesis inhibitor (blocks cytochrome P450 17 alpha-hydroxylase)
What is the best treatment for rheumatological conditions in pregnancy that are not responsive to steroids
Azathioprine
Which drug can be used to slow the growth of cysts in ADPKD
Tolvaptan
What should be started 3 days before a GnRH agonist in the treatment of prostate cancer
Anti-androgen treatment (cyproterone acetate/bicalutamide) - reduces risk of tumour flare
Which nephropathy is malignancy most associated with
Membranous glomerulopathy
Which antibodies are associated with primary membranous glomerulopathy
Anti-phospholipase A2 (Anti-PLA2R)
What is the risk associated with large volumes of 0.9% NaCl
Hyperchloraemic metabolic acidosis
How much potassium is required for routine maintenance over 24hrs
1 mmol/kg
How much water is required for routine maintenance over 24hrs
30ml/kg
How much glucose is required for routine maintenance over 24hrs
50-100g
Which electrolyte imbalance is commonly seen after plasma exchange
Hypocalcaemia
Which RTA causes bone demineralisation due to phosphate wasting
Fanconi syndrome (type 2 RTA)
What is Stauffer syndrome
Paraneoplastic hepatic dysfunction syndrome in renal cell cancer - typically presents as cholestasis/hepatosplenomegaly
Which inherited disorder of type IV collagen causes persistent haematuria with normal kidney function
Thin basement membrane disease
What are the causes of transient microscopic haematuria
UTI, menstruation, vigorous exercise, sexual intercourse
What are the causes of persistent microscopic haematuria
Cancer, stones, BPH, prostatitis, urethritis, intrinsic renal disease
What kidney complication causes extremely painful, purpuric patches with black necrotic tissue in the lower limbs
Calciphylaxis
Which cancer is a kidney transplant patient most at risk of
Squamous cell carcinoma (due to long-term steroids)
What are the endocrine effects of renal cell carcinoma
Erythropoietin, PTH, renin, ACTH
What are the 5 features of HIV-associated nephropathy
Massive proteinuria/nephrotic syndrome Normal or large kidneys FSGS with capillary collapse on biopsy Elevated urea and Cr Normotension
Which drugs are associated with retroperitoneal fibrosis
Ergot derived drugs and beta blockers
What is the treatment of HIV-associated nephropathy
Aggressive antiretroviral therapy and ACEi
Which renal pathology is plasmodium malariae associated with
Membranous glomerulonephritis
What is the most common cause of nephrotic syndrome in older adults
FSGS
What causes carpal tunnel syndrome and bony cysts with conventional dialysis >5 years
Beta 2 microglobulin amyloidosis
What presents with pigmentation of the sclera, urine and connective tissues
Alkaptonuria
What type of GN is associated with HIV nephropathy
FSGS
What does xanthogranulomatous pyelonephritis show on biopsy
Lipid-laden macrophages with lymphocytes and PMNs
What is the treatment of scleroderma renal crisis
ACEi
What is mortality related to in familial Mediterranean fever
Deteriorating renal function
Which renal pathology is most likely to recur after renal transplant
Membranoproliferative glomerulonephritis
What are kimmelstein-Wilson nodules suggestive of on renal biopsy
Nodular sclerosis - Diabetic nephropathy, amyloidosis, cigarette smoking
Which disease occurs after gadolinium exposure in impaired renal function
Nephrogenic systemic fibrosis
Which renal condition is associated with atanazavir use in HIV
Crystal nephropathy
What presents with hypokalaemic alkalosis, suppressed renin and aldosterone, and hypertension
Liddle’s syndrome
Which type of RTA causes severe metabolic acidosis and a urinary pH >5.5
Type 1 (distal) RTA
Which RTA presents with nephrocalcinosis
Type 1 (distal) RTA
Which type of RTA is due to failure to absorb bicarbonate
Type 2 (proximal) RTA
What is the management of acute pyelonephritis due to obstructive stones
Emergency surgery for ureteral calculus with stenting
What condition presents with nodularity and diffuse tenderness on PR exam + mildly raised PSA
Chronic intermittent prostatitis
What presents with symptoms similar to systemic sclerosis but with no autoimmune antibodies in dialysis patients
Nephrogenic systemic fibrosis (after gadolinium exposure)
What type of dialysis membrane is useful for dialysis amyloidosis due to excess beta-2 microglobulin
High-flux dialysis membranes
What is the treatment of flexor synovitis due to dialysis amyloidosis
Incision of the flexor retinaculae
Which familial condition causes hepatosplenomegaly, nephrotic syndrome and progressive renal disease
Familial renal amyloidosis
What cause of seizure is seen within 90 days of starting erythropoietin
Erythropoietin-induced epilepsy
What is the target Hb of patients on Epo
110g/L