Renal Stones and Urological Haematuria Flashcards

1
Q

What are important factors that predispose to the formation of renal stones?

A
Urinary salts >water
- Excess of salts
- Lack of water
Crystal retention
- Many people pass small crystals
- Anatomical abnormalities
- Adherence to urothelium
FHx
Climate/geography
Diet
- Animal protein
- Refined sugar
- Lack of fibre
- Lack of water
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2
Q

What sort of renal stone is the most common?

A

Ca calculus

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3
Q

What can cause the formation of a calcium calculus?

A

Primary hyperparathyroidism
Immobilisation
Malignancy
Sarcoidosis

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4
Q

If someone presents with a renal stone, what tests should be done?

A

Serum calcium > if elevated, test for serum PTH > if elevated, test for adenocarcinoma

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5
Q

What can cause uric acid lithiasis?

A

Idiopathic
Gout
Low urine output
Myeloproliferative disease; eg: leukaemia

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6
Q

What causes cystinuria?

A

Inborn error of metabolism

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7
Q

How can cystinuria present?

A

Multiple recurrent stone episodes

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8
Q

What can cause secondary urolithiasis?

A
Infection
Obstruction
Medullary sponge kidney - dilated renal calyces
Urinary diversion
Enteric hyperoxaluria
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9
Q

What can cause idiopathic calcium urolithiasis?

A

Hypercalciuria

Normocalciuria

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10
Q

What are the compositions of renal stones, from most to least common?

A

Ca oxalate
Ca phosphate - most commonly associated with hyperparathyroidism
Uric acid
Ca NH4MgPO2 - associated with infections that split urea; eg: Proteus
Cystine

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11
Q

What is the shape of of Ca NH4MgPO2 stones?

A

Staghorn

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12
Q

What investigation is required if someone presents with a Proteus UTI?

A

Imaging to determine if stone present

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13
Q

What is the presentation of renal calculi?

A
Pain
- Recurrent; eg: with exercise - indicates mobile stone
- Acute obstruction
- Pelvic-ureteric junction calculus
Haematuria
Infection
Incidental
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14
Q

What is the treatment for renal calculi?

A

Observe
- Asymptomatic calyceal calculus
Unless in renal pelvis, then usually treat

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15
Q

How are renal stones imaged?

A

US for screening
X-ray for radiolucent stones
Non-contrast CT

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16
Q

How do you medically treat a renal uric acid stone?

A

Hydration
Alkalinisation
Allopurinol

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17
Q

How do you medically treat a renal cystine stone?

A

Hydration
Alkalinsation
Chelating agent; eg: penicillamine

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18
Q

What are the surgical treatments for a renal stone?

A
Extracorporeal shockwave lithotripsy
Percutaneous nephrolithotomy
Open surgery
- Pyelolithotomy
- Nephrolithotomy
- Nephrectomy
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19
Q

What is the presentation of ureteric calculi?

A

Pain

  • Flank
  • Abdomen
  • Groin
  • Scrotum/labia
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20
Q

What are the differential diagnoses for flank pain due to pathology in the kidney?

A
Acute obstruction due to
- Stones
- Pyelo-ureteric junction obstruction
- Clot colic
- Sloughed papilla
- Extrinsic obstruction
Pyelonephritis
- Fever
- If have UTI, may have urinary symptoms
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21
Q

What are the differential diagnoses for flank pain due to pathology intraperitoneally?

A

Gallbladder
Apendix
Bowel
Ovary

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22
Q

What are the differential diagnoses for flank pain due to pathology retroperitoneally?

A

Leaking aortic aneurysm

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23
Q

What are the differential diagnoses for flank pain due to scrotal pathology?

A

Testicular torsion

Epididymis

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24
Q

What are the investigations for ureteric stones?

A
Urine
- Haematuria
- Infection
Imaging
- Plain x-ray
- Non-contrast CT
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25
What is the management of ureteric stones?
``` 75% will pass without intervention Passage related to - Size <5 mm - Site: lower >upper - Shape: smooth >ragged - PHx ```
26
What are the indications for intervention with ureteric stones?
Obstruction with infection/sepsis Large calculus >6 mm Ongoing pain Failure to progress Solitary kidney/bilateral ureteric calculi Social/occupational; eg: impending travel/airline pilot
27
What are the surgical interventions available for the removal of ureteric stones?
Nephrostomy drainage Ureteric stent Extracorporeal shockwave lithotripsy Ureteroscopy with fragmentation
28
What source is indicated in macroscopic haematuria?
``` Initial (at start of stream) - Urethral/prostate Terminal (starts near end of stream) - Bladder neck Total - Bladder - Ureter - Kidney ```
29
If clots are present in haematuria, what source is indicated by their shape?
Round - bladder | Wormlike - kidney/ureter
30
If pain is associated with haematuria, what source is indicated by where the pain is?
Flank - kidney/ureter | Suprapubic - bladder
31
What urinary symptoms can be associated with haematuria?
Dysuria | Frequency
32
What are the investigations for haematuria?
``` Urine - Microscopy - RBC morphology - Misshapen - glomerular - Fairly regular - non-glomerular - Protein casts - Cytology - test urine for malignant cells - specific for transition cell carcinoma - Culture Imaging - US urinary tract - CT urogram Endoscopy - Cystoscopy - +/- retrograde pyelogram - Ureteropyeloscopy +/- biopsy ```
33
What is the best imaging for haematuria?
CT urogram - do pre- and post-contrast | Picks up any collecting defects/masses
34
What are pre-renal causes of haematuria?
Coagulopathy
35
What are renal parenchymal causes of haematuria?
Glomerulonephritis Renal neoplasm Trauma
36
What are causes of haematuria in the renal collecting system?
Transitional cell carcinoma SCC - much less common Calculus Infection
37
What are causes of haematuria in the ureters?
Transitional cell carcinoma | Calculus
38
What are the causes of haematuria in the bladder?
Transitional cell carcinoma Cystitis Calculus Trauma
39
What is the most common cause of haematuria?
Cystitis
40
What findings indicate cystitis as the cause for haematuria?
+ve urine culture | Usually have other urinary symptoms
41
What are the causes of haematuria in the urethra?
Stricture | Infection
42
What is the most common cancer of the kidney?
Renal cell carcinoma
43
From where does renal cell carcinoma arise?
Parenchyma, usually proximal tubule
44
What is the presentation of renal cell carcinoma?
``` Incidental - most common presentation Classic triad - rarely seen - Haematuria - Mass - Pain Systemic symptoms - Weight loss - Appetite loss Metastatic disease - Bone - Lung - Liver - Brain Paraneoplastic syndrome - Hypercalcaemia - HTN - Pyrexia - Hepatoxicity - abnormal LFTs Haematological - Anaemia - Polycythaemia IVC obstruction - Local extension of tumour - Lower limb oedema - Varicocoele ```
45
What is the treatment for renal cell carcinoma?
``` Surgical, if - Primary disease - Single metastasis Medical, if - Palliation of metastatic disease Radiation, if - Palliation of metastatic disease ```
46
What are the surgical option for the treatment of renal cell carcinoma?
``` Radical nephrectomy - Removal of contents of Gerota's fascia = - Kidney - Adrenal gland - Perinephric fat Partial nephrectomy - Preferred, especially if small, incidental finding - Performed if - Solitary kidney - Poorly functioning contralateral kidney - Bilateral tumours - Small peripheral tumours ```
47
What is the medical treatment for renal cell carcinoma?
Tyrosine kinase inhibitor; eg: sunitinib
48
What sort of metastases is radiotherapy especially good for, in renal cell carcinoma?
Bony/soft tissue mets
49
From where can transitional cell carcinoma arise?
Renal pelvis Ureter Bladder/prostatic urethra
50
What are the risk factors for transitional cell carcinoma?
``` Cigarette smoking Industrial exposure - Dyes - Leather - Rubber - Hydrocarbons Papillary necrosis Pelvic radiotherapy Cyclophosphamide Field effect = transitional cell carcinoma elsewhere in urinary tract FHx ```
51
What is cyclophosphamide?
Cytotoxic drug used in some malignancies and autoimmune conditions
52
What is the epidemiology of transitional cell carcinoma in the renal pelvis?
M:F = 3:1
53
What is the presentation of transitional cell carcinoma in the renal pelvis?
Haematuria Pain Mass
54
How is transitional cell carcinoma in the renal pelvis diagnosed?
``` CT urogram - Filling defect - Dilatation/non-function - Parenchymal invasion of mass Retrograde pyelogram - Cytology - Lavage - Brush biopsy Ureterorenoscopy - Direct visualisation - Biopsy ```
55
What is the treatment for transitional cell carcinoma in the renal pelvis?
Nephro-ureterectomy and cuff of bladder removal Surveillance cytoscopy - 35% risk of bladder transitional cell carcinoma
56
What is the presentation of transitional cell carcinoma in the ureter?
Haematuria | Flank pain
57
How is transitional cell carcinoma in the ureter diagnosed?
``` CT urogram - Filling defect - Hydronephrosis/non-function Retrograde pyelograpm Cytology Ureteroscopy > biopsy ```
58
What is the treatment for transitional cell carcinoma in the ureter?
Nephro-ureterectomy, including cuff of bladder Segmental lower ureterectomy Surveillance cystoscopy
59
What is the T staging for transitional cell carcinoma in the bladder?
``` Ta = mucosa T1 = sub-mucosa T2 = muscle T3 = extravesical fat T4 = adjacent organs ```
60
What are the different grades of transitional cell carcinoma in the bladder?
``` Low grade High grade Carcinoma in situ = high grade - Usually quite flat - If untreated, progresses to invasive disease - Needs aggressive treatment ```
61
What is the presentation of transitional cell carcinoma in the bladder?
``` Painless haematuria Symptoms of cystitis - In absence of infection - Recurrent infection Incidental ```
62
How is transitional cell carcinoma in the bladder diagnosed?
US CT urogram Urine cytology Cystoscopy/resection biopsy - into bladder wall to try and get some muscle
63
What is the treatment for transitional cell carcinoma in the bladder that has not invaded the muscle?
``` Transurethral resection of bladder tumour - Curative for grades 1 and 2 - 75% recur - Surveillance cystoscopy Multiple/frequent recurrences - Intravesical therapy - BCG - Mitomyic - Adriamycin - Thiotepa ```
64
What is the treatment for carcinoma in situ, or high grade superficial transitional cell carcinoma in the bladder?
Intravesical BCG weekly for 6 weeks | If fail local therapy, high risk of progression to muscle invasion > radical cystectomy
65
What is the treatment for transitional cell carcinoma in the bladder that has invaded the muscle?
Transurethral resection of bladder tumour for diagnosis Staging - CT abdomen - CXR Radical cystectomy and ileal conduit/neobladder Radiotherapy Chemotherapy with cis-platinum based drugs
66
What are the acute investigations performed when someone presents with renal stones?
``` FBE UEC Creatinine Serum Ca and uric acid MSU CT-KUB X-ray KUB ```
67
What is the acute management for renal stones?
``` Pain relief - NSAIDs - Opioids - Paracetamol Hydration Does patient need acute intervention? - Yes > admission - No > surveillance ```
68
Is obstructive pyelonephritis a urological emergency?
Yes
69
What organism usually causes obstructive pyelonephritis?
Gram negative bacteria; eg: E coli
70
What is a complication of obstructive pyelonephritis?
Systemic inflammatory response syndrome/shock
71
What is thee management of obstructive pyelonephritis?
``` IV Abs, covering Gram -ves and Enterococcus Urgent decompression - Nephrostomy - Stent Supportive care - Fluids - Monitoring - ICU if necessary ```
72
What are the medical expulsive therapies available for the management of renal stones?
``` Alpha-blockers - relax ureteric wall - Increase stone passage - Decrease time to stone passage by 2-4 days - Decrease pain Eg: tamsulosin ```
73
How do you prevent renal stone recurrence?
``` Adequate fluid intake Dietary modification Urinary alkalinisation Medical therapy - Allopurinol - Thiazide diuretics ```
74
What can cause a false positive dipstick in haematuria?
Myoglobinuria