Urology Flashcards
What is non-visible Haematuria?
5% risk of malignancy, 20% for visible
Anything more than a ‘trace’ of blood on dipstick
List 3 false positives for haematuria
Exercise
Periods
Myoglobin
List 2 false negatives for haematuria
Vit c intake
Heavy proteinuria
Compare Nitrites and Leucocyte use in diagnosing UTI
Nitrites: More specific for UTI (Less false +ves)
Leukocytes: More sensitive for UTI (Less false -ves)
What things are looked at on a urine dipstick
Blood Nitrites, Leukocytes Glucose pH (Stones) Urine specific gravity
Protein
Ketones
Bilirubin urobilinogen
What exams would you do in someone with haematuria
Abdomen
External genitalia if male
DRE if male
What would you ask about in history to someone with haematuria
Duration/ where in stream/ clots?
Past investigations/ treatment?
Cancer RFs (Smoking, Occupation, Fhx)
Anticoagulants?
List 3 radiological investigations for Haematuria
USS KUB
CT Urogram (Upper urinary tract)
Flexible Cystoscopy (Lower Urinary Tract)
What can USS detect?
Renal masses
Hydro
Bladder masses (if bladder full) or bladder enlargement
Which malignancy is USS less accurate at detecting?
Upper tract TCC
Rare, 0.75% of pts with visible haematuria
When is CT urogram used?
As a 2nd line test in recurrent visible haematuria where USS and Cystoscopy are negative
Compared to USS, what is a CT Urogram better at detecting?
What else can it show?
Upper tract TCC
Renal masses (RCC) Filling defects in bladder (Tumour/ stones)
What is Pseudohaematuria?
List some causes
Red/ brown urine that is not due to presence of haemoglobin.
Medication (Rifampicin/ Methyldopa)
Hyperbilirubinuria
Myoglobinuria
Foods (Beetroot/ Rhubarb)
Compare CT urogram to non-contrast CT KUB
CT U: More definitive for UT-TCC. More radiation, requires IV contrast
nc CT KUB: Faster, used more for Stones,
Outline use of Cystoscopy
Done with Local Anaesthetic
Small biopsies can be taken for diagnosis, as well as looking
Not useful during active bleeding (poor views, needs a GA Cystoscopy and washout)
List haematuria causes
UTI/ Parasitic (Schistosomiasis)
Stones
Maligancy (Urinary tract or Prostate)
BPH
Trauma
Radiation cystitis
Nephrological causes (e.g IgA Nephropathy)
Where are Renal Cell Carcinomas (RCC)?
What’s the commonest type of RCC, and what is this associated with?
Kidney parenchyma
Clear Cell RCC, associated with Von-Hippel Lindau syndrome (Inherited disorder, causes tumours/ cysts to grow in multiple body parts- Inner eyes, Brain, Spinal cord, Pancreas, Adrenal glands, Kidney etc)
RCC is an Adenocarcinoma, more common in Males, derived from PCT epithelium.
What are some RFs
Smoking, Obesity, HTN, FHx, Dialysis
Anatomical abnormalities (Horseshoe pr Polycystic Kidney) Industrial carcinogen exposure (Cadmium, Lead etc)
What is the presentation triad of RCC? (15% of cases)
Haematuria, Loin pain, Palpable mass
Possible Varicocoele, via Renal Vein obstruction
How soon does RCC metastasise
What substance may it secrete?
Early, before local symptoms usually
PTH-rP
List some Paraneoplastic syndromes associated with RCC
Stauffer’s Syndrome (abnormal LFTs)
Hypercalcaemia (PTH-rP)
HyperT (Renin)
Polycythaemia (EPO)/ Anaemia
Amenorrhoea/ Baldness/ Cushing’s
Pyrexia
Outline diagnosis and staging investigations for RCC
USS picks most up
Contrast CT needed to confirm and stage
Outline surgical RCC treatment
Smaller tumours (T1): Partial nephrectomy
Larger tumours (T2): Radical nephrectomy (Kidney, Perinephric fat, Para-aortic lymph nodes. Spare adrenal glands if possible)
How can RCC be managed non-surgically?
Percutaneous Radiofrequency Ablation
Laparoscopic/ Percutaneous Cryotherapy
Renal artery embolisation may be needed if haemorrhaging