title: Needle-tract implantation following us-guided fine-needle aspiration biopsy of transitional cell carcinoma of the bladder, urethra, and prostate.
abstract: Localized tumor implantation of the ventral abdominal wall was found at 2, 5, and 8 months following percutaneous ultrasound-guided fine-needle aspiration biopsy (FNAB) of transitional carcinoma of the bladder, urethra, or prostate in 3 dogs. To our knowledge this complication has not been reported in dogs following FNAB. Despite the rarity of needle-tract implantation, the potential for this complication with transitional cell carcinomas is apparently not negligible and warrants consideration. We recommend traumatic urethral catheterization to obtain a cytologic diagnosis of potential transitional cell carcinomas of the lower urinary tract or prostate whenever possible until more information becomes available. However, needle-track implantation is so rare that it should not influence the decision to perform a percutaneous FNAB if the urethra cannot be catheterized.
authors.affiliation: Department of Surgical & Radiological Sciences, School of Veterinary Medicine, University of California, Davis 95616, USA.
authors.forename: Thomas G
authors.initials: TG
authors.lastname: Nyland
authors.forename: Seth T
authors.initials: ST
authors.lastname: Wallack
authors.forename: Erik R
authors.initials: ER
authors.lastname: Wisner
mesh_terms: D000818:Animals; D001707:Biopsy, Needle / Q000009:adverse effects / Q000379:methods; D002295:Carcinoma, Transitional Cell / Q000473:pathology / Q000662:veterinary*; D004283:Dog Diseases / Q000473:pathology*; D004285:Dogs; D005260:Female; D008297:Male; D011471:Prostatic Neoplasms / Q000473:pathology / Q000662:veterinary*; D014523:Urethral Neoplasms / Q000473:pathology / Q000662:veterinary*; D001749:Urinary Bladder Neoplasms / Q000473:pathology / Q000662:veterinary*