Peer-reviewed veterinary case report
First reported urothelial cyst in a female Maltese dog
By Kim, Soobin et al.·Published in Journal of veterinary science·2025·Topcare Animal Medical Center, South Korea·View original on PubMed →
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Original publication title: First case report of urothelial cyst in a dog: diagnostic approach.
- Species:
- dog
Plain-English summary
An 18-year-old female Maltese was brought to the vet with a lump near her mammary gland, but she showed no other signs of illness. X-rays and ultrasound revealed a large cystic mass in her abdomen, which was touching her bladder and vagina but not directly connected to them. The vet performed surgery to remove the mass, and tests confirmed it was a urothelial cyst, a type of fluid-filled sac. This case is important because it shows that urothelial cysts can occur in dogs and highlights the need for proper imaging to diagnose them early.
People also search for: dog abdominal mass · Maltese lump near vagina · urothelial cyst in dogs treatment
Abstract
IMPORTANCE: Cystic masses in the abdominal cavity near the vaginal area can have a range of origins, including urothelial cysts, which have never been reported in dogs. This paper reports the first known occurrence of a urothelial cyst in a dog. CASE PRESENTATION: An 18-year-old, 2.05 kg intact female Maltese dog presented with a mammary nodule with no systemic clinical signs. The radiographs and ultrasound revealed a large cystic mass in the abdominal cavity. Computed tomography imaging showed that the mass was in contact with the bladder, urethra, and vagina but had no direct connections to these organs. Surgical removal was performed. Histopathology analysis confirmed a urothelial cyst lined with transitional and stratified squamous epithelium. CONCLUSIONS AND RELEVANCE: This case highlights the need to include urothelial cysts in a differential diagnosis of cystic masses near the vaginal region in dogs. Early imaging-based detection is crucial to preventing misdiagnoses and ensuring appropriate surgical intervention. Veterinarians must carefully differentiate this condition from other reproductive disorders, including pyometra and uterine tumors, to avoid complications and ensure appropriate management.
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Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/40461429/