title: Ultrasound-guided catheter biopsy of the lower urinary tract: technique and results in 12 dogs.
abstract: Ultrasound-guided catheter biopsy of lesions affecting the lower urinary tract was attempted in 12 dogs with mucosal lesions affecting the bladder (nine) or urethra (three). Histological biopsies were obtained by catheter biopsy in 10 dogs, enabling diagnosis of transitional cell carcinoma in five, papilloma in two, prostatic carcinoma in two and chronic cystitis in one. Cytological samples alone were obtained in two dogs, one of which enabled a diagnosis of transitional cell carcinoma; the other contained evidence of haemorrhage and inflammation, but squamous cell carcinoma was found in a subsequent excisional biopsy. Intravesicular haemorrhage after biopsy was observed ultrasonographically in two dogs. Ultrasound guidance enables accurate determination of biopsy catheter position. The size of biopsies obtained by this method may limit the accuracy of histological diagnosis.
authors.affiliation: Queen Mother Hospital for Animals, Department of Small Animal Medicine and Surgery, Royal Veterinary College, North Mymms, Hertfordshire.
authors.forename: C R
authors.initials: CR
authors.lastname: Lamb
authors.forename: N D
authors.initials: ND
authors.lastname: Trower
authors.forename: S P
authors.initials: SP
authors.lastname: Gregory
mesh_terms: D000818:Animals; D001706:Biopsy / Q000379:methods / Q000662:veterinary*; D002294:Carcinoma, Squamous Cell / Q000175:diagnosis / Q000473:pathology / Q000662:veterinary; D002295:Carcinoma, Transitional Cell / Q000175:diagnosis / Q000473:pathology / Q000662:veterinary; D003556:Cystitis / Q000175:diagnosis / Q000473:pathology / Q000662:veterinary; D004283:Dog Diseases / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000473:pathology; D004285:Dogs; D005260:Female; D008297:Male; D010212:Papilloma / Q000175:diagnosis / Q000473:pathology / Q000662:veterinary; D011471:Prostatic Neoplasms / Q000175:diagnosis / Q000473:pathology / Q000662:veterinary; D014463:Ultrasonography / Q000379:methods / Q000662:veterinary*; D014521:Urethra / Q000000981:diagnostic imaging / Q000473:pathology; D014523:Urethral Neoplasms / Q000175:diagnosis / Q000473:pathology / Q000662:veterinary; D001743:Urinary Bladder / Q000000981:diagnostic imaging / Q000473:pathology; D014546:Urinary Catheterization / Q000379:methods / Q000662:veterinary*; D014551:Urinary Tract / Q000000981:diagnostic imaging* / Q000473:pathology*