Surgery - Urology Flashcards
What is the best form of imaging for kidney stones?
CT KUB
Recall the 4 main types of kidney stone in order of highest to lowest radiointensity
Calcium phosphate
Calcium oxalate
Triple (struvite) stones
Uric acid (radiolucent)
Which type of kidney stone is associated with urease bacteria?
Triple (struvate) stones
Which type of kidney stone is associated with hypercalciuria?
Calcium oxalate
How should kidney stone pain be managed?
PR/ IM diclofenac
Recall one contra-indication to diclofenacin renal colic. What should be used instead?
CVS disease
IV Paracetamol
What initial investigations should be performed for renal colic?
Urine dipstick + culture
Serum creatinine + electrolytes: ?renal function
FBC/ CRP: ?associated infection
Calcium/ Urate: ?underlying causes
Clotting if percutaneous intervention planned
Blood cultures if pyrexial/ signs of sepsis
What imaging should be performed for suspected renal stones?
non-contrast CT KUB
How should kidney stones be managed depending on size?
<0.5cm: expectant Tx +/- tamsulosin
<2cm: ESWL
<2cm + pregnant: uteroscopy
> 2cm (inc. staghorn calculi): percutaneous nephrolithotomy
If hydronephrosis/ infection: nephrostomy tube/ ureteric stent + abx
Give 4 causes of unilateral hydronephrosis
PACT
Pelvic-ureteric obstruction: congenital/ acquired
Aberrant renal vessels
Calculi
Tumours of renal pelvis
Give 5 causes of bilateral hydronephrosis
SUPER
Stenosis of the urethra
Urethral valve
Prostatic enlargement
Extensive bladder tumour
Retro-peritoneal fibrosis
How is hydronephrosis investigated?
USS: identifies presence of hydronephrosis + assess kidneys
IV Urography: assess position of obstruction
Antegrade or retrograde pyelography: allows Tx
If suspect renal colic: CT scan
Describe management of hydronephrosis
Remove obstruction + drain of urine
Acute upper urinary tract obstruction: nephrostomy tube
Chronic upper urinary tract obstruction: ureteric stent or a pyeloplasty
2 RFs for BPH
Age
Black > White > Asian
What does BPH present with?
LUTS-
Obstructive Sx: Hesitancy, Incomplete emptying, Poor flow, Straining
Irritative Sx: Frequency, Urgency, Nocturne, Incontinence
Terminal dribbling
Investigations for BPH
Urine dipstick
U+Es: esp. if chronic retention suspected
PSA: if obstructive Sx or if patient is worried about prostate cancer
Urinary frequency-volume chart for at least 3 days
IPSS
Name 2 alpha-1 antagonists
Tamsulosin
Alfuzosin
Recall 2 options for medically managing BPH
Alpha-1 antagonist: 1st line for mod-sev voiding Sx (IPSS >,8)
5 Alpha reductase inhibitors: indicated if significantly enlarged prostate + high risk of progression
Describe the MOA of alpha-1 antagonists in BPH
Decrease smooth muscle tone of prostate + bladder
Improves urine flow + reduces Sx
List 4 side effects of alpha-1 antagonists used in BPH
Dizziness
Postural hypotension (systemic vasodilation)
Dry mouth
Depression
Describe the MOA of 5 Alpha-reductase inhibitors in BPH
Block conversion of testosterone to dihydrotestosterone (DHT) which is known to induce BPH
Reduce prostate volume, may slow progression
May decrease PSA conc.
Describe 1 drawback of 5 Alpha-reductase inhibitors
Reducing prostate volume takes time, Sx may not improve for 6 months
Give 4 side effects of 5 Alpha-reductase innhibitors
ED
Reduced libido
Gynaecomastia
Ejaculation problems
What is the main way in which BPH can be surgically managed?
TURP (transurethral resection of the prostate)
What is the main complication of TURP to be aware of?
TURP syndrome: irrigation fluid enters systemic circulation
* Hyponatraemia: dilutional
* Fluid overload
* Glycine toxicity
List 4 complications of transurethral resection
TURP
Turp syndrome
Urethral stricture/ UTI
Retrograde ejaculation
Perforation of the prostate
When can PSA levels not be done?
Within:
- 6w of a prostate biopsy
- 1w of DRE
- 4w following a proven UTI/ prostatitis
- 48h of vigorous exercise +/or ejaculation
- Urinary retention
- Instrumentation of urinary tract
When would a multi-parametric MRI be used to investigate possible prostate cancer?
If PSA is inappropriate or if high chance of Ca
What is the gold-standard investigation for prostate cancer?
Multiparametric MRI (this has replaced TRUS-guided biopsy)
Results compared to 5-point Likert scale
What scoring system is used for prostate cancer?
Grade group (new)
Gleason score (old)
How is the Gleason score determined?
Most common grade (1-5)
Highest grade (1-5)
Most common grade + highest grade = Gleason score
What does each Gleason score/ Grade Group indicate?
GS6, GG1: similar to normal cells, slow growing, low risk
GS7 (3+4), GG2: mostly similar to normal, slow growing, intermediate risk
GS7 (4+3), GG3: less like normal cells, moderate rate of growth, high risk
GS8, GG4: some abnormal cells, moderate-fast growing, high risk
GS9-10, GG5: very abnormal cells, fast growing
Recall 3 options for managing localised prostate cancer (T1/T2)
- Conservative with active monitoring
- Radical prostatectomy
- Radiotherapy (external beam + brachytherapy)
Name a complication of radiotherapy in prostate cancer
Proctitis
Inflammation of lining of rectum- rectal pain + bleeding
Recall 3 options for managing localised advaced prostate Ca
- Hormonal therapy
- Radical prostatectomy
- Radiotherapy
How should metastatic prostate cancer disease be managed?
Hormonal therapy only
What are the options for hormone therapy in prostate cancer?
Synthetic GnRH agonist + 3w cover of anti-androgen
Recall 2 types of benign epithelial renal tumour
Papillary adenoma
Renal oncocytoma
What sort of tumour is an angiomyolipoma?
Benign mesenchymal renal tumour composed of thick-walled blood vessels, smooth muscle + fat
What is the maximum size for a papillary adenoma?
15mm
If more than this = malignant papillary renal cell carcinoma
What type of renal tumour can be seen in Birt-Hogg-Dube syndrome?
Renal oncocytoma
What type of renal tumour can be seen in tuberous sclerosis?
Angiomyolipoma
Renal cell cancer accounts for … of primary renal neoplasms
85%
In which patients is renal cell carcinoma more common?
Middle-aged Men
List 5 RFs for renal cell carcinoma
Smoking
HTN
Obesity
Diabetes
FH
Name 2 genetic syndromes that predispose to renal cell carcinoma
Von Hippel Lindau
Tuberous sclerosis
What are the 3 main subtypes of renal cell carcinoma, and which is most common
Clear cell (75-85%)
Papillary (2nd)
Chromophobe (3rd)
Which tumours are people with Von-Hippel-Lindau predisposed to?
Phaeochromocytoma
Neuroendocrine pancreatic
Clear cell renal
Which type of renal cell tumour is associated with loss of 3p?
Clear cell renal
Which type of renal tumour is associated with long-term dialysis?
Papillary renal cell carcinoma
Classic triad of S/S in renal cell carcinoma
Haematuria
Loin pain
Abdominal mass
Rare to present with these (<10%)
How do renal cell carcinoma patients usually present?
Often asymptomatic until late stages
>50% detected incidentally on imaging
What percentage of symptomatic renal cell carcinomas present with neoplastic syndromes? What are these?
30%
EPO: Polycythaemia
Renin: HTN
Parathyroid like hormone: Hypercalcaemia
ACTH: Cushing’s
What features on examination may suggest renal cell carcinoma?
Varicocele (tumour compressing veins)
Bilateral lower limb oedema (venous involvement)
Pyrexia of unknown origin
What is Stauffer syndrome?
Paraneoplastic disorder a/w RCC
Presents as cholestasis/ hepatosplenomegaly
Due to increased levels IL-6
Give 2 indications for 2ww referral in potential RCC
Unexplained macroscopic haematuria w/o UTI
Persistent macroscopic haematuria despite successful UTI Tx
Investigations for RCC
CT CAP
MRI for small lesions/ vascular involvement
CT + MRI with contrast
Surgical management for local RCC
Partial nephrectomy (<7cm, confined to kidney)
Radical nephrectomy
Medical management for metastatic RCC
Alpha-interferon + IL2
VEGF receptor TK inhibitors: Sorafenib, Sunitinib
What is Wilm’s tumour?
Nephroblastoma
How should high-grade transitional cell carcinomas be managed?
1st: intravesical immunotherapy
2nd: radical cystectomy
How should traumatic urethral injuries be investigated and managed?
Ix: ascending urethrogram
Mx: suprapubic catheter
How should traumatic bladder injuries be investigated and managed?
Ix: Intravenous urogram or cystogram
Mx: laparotomy if intraperitoneal, conservative if extraperitoneal