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17-year-old Male Neutered DSH
4 kg
Presenting complaint and brief history
The patient presented with a history of stranguria and hematuria.
Diagnosis
Hides the diagnosis, imaging findings, outcome, take-home points and correlation photos so you can read the images blind.
Urothelial carcinoma (transitional cell carcinoma)
Confirmed
Imaging findings
A broad-based, mineralized, vascular bladder wall mass at the cranial aspect with undulant luminal margins and an internal anechoic cleft.
What happened with the patient
Case progress lost to follow-up.
Key take-home points
- Urothelial carcinoma doesn't have to be at the trigone; It can also be in the cranial bladder. A cranial location might actually make it resectable as well.
- For a mass like this, a free-catch urine BRAF assay is reasonable, with ultrasound-guided catheter-assisted biopsy or cystoscopy also being options. Ultrasound-guided fine-needle aspiration is sometimes held in reserve, though, given the seeding risk.
- Quick note about seeding: Needle tract implantation ("seeding") is documented only in isolated case reports with a debated incidence, so it is considered very rare, but the consequence is body wall neoplasia that may be untreatable.
Contributed by
- Oren Ofer
DVM, DVSc, DACVR
52 cases
Educational use only — not clinical advice.
Cite this case
Ofer O. Urothelial carcinoma (transitional cell carcinoma). Radabase case 93147926. Retrieved 2026-11-08 from https://www.radabase.vet/case/93147926-249a-45f5-bd0f-7c0dd002f054
Discussion
Questions and observations from colleagues. Never post identifying patient or owner information.
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