image of Haematuria
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Haematuria (blood in the urine) is commonly seen in feline practice and can vary from very mild and only detectable on dipsticks (most common) to severe gross haematuria. It may be caused by blood leaking into any part of the urinary tract (kidneys, ureters, bladder, urethra) or the associated reproductive tract (e.g. prostate, prepuce, uterus, vagina), or it can result from a haemostatic defect, where the degree of haematuria may be very severe and grossly evident. This chapter considers aetiology and differentials, diagnostic approach and management.

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5.13.1 Severe haematuria; clots caused urinary obstruction.
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5.13.3 Ultrasound examination showing multiple anechoic renal cysts and a perirenal pseudocyst (visible as anechoic ‘rim’ on left-hand side of scan) in a 9-year-old Persian cat with hereditable PKD.
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5.13.4 Bladder TCCs identified by ultrasonography and cystoscopy. Image (b) is from a dog. The gross appearance of a TCC is similar in both dogs and cats; however, in dogs TCCs tend to arise from the trigone region of the bladder whereas in cats they frequently occur in sites distant to the trigone. (b, courtesy of P Lhermette)
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5.13.5 Ultrasound appearance of a kidney from a cat with renal lymphoma.
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5.13.6 Urine samples: (left to right) haematuria, haemoglobinuria, bilirubinuria, normal urine.
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