# Bladder duplication in the male cat: the first case report in China

## TL;DR

This paper reports the first case of bladder duplication in a cat in China, including an attached tubular structure, offering insights for future diagnosis and treatment.

## Contribution

The novelty lies in being the first global case of feline bladder duplication with tubular structure attachment and the first in China.

## Key findings

- A 6-year-old male cat was diagnosed with bladder duplication and an accessory tubular structure.
- Surgical removal and histopathological examination confirmed the diagnosis of double bladder with attached tubular tissue.
- The case provides a reference for diagnosing and treating similar rare urinary tract anomalies in cats.

## Abstract

Bladder duplication is a rare congenital lower urinary tract anomaly disease characterized by the presence of two bladders, possibly with duplication of the urethra. This disease is rarely reported in cats. The clinical symptoms are commonly occult, with increased difficulty in making a definitive diagnosis, especially if there is no obvious urethral duplication. The diagnosis is typically based on radiographs and ultrasound, with computer tomography serving as a more advanced imaging diagnostic modality. Cases of duplicated bladders with accessory tubular tissues are even scarcer in both human and veterinary medicine.

A 6-year-old male neutered cat was brought to the hospital because of vomiting and constipation. Cystography revealed increased soft tissue density of a fusiform structure in the lower middle abdomen. The purulent-filled cavitary structure and the accessory tubular structure were removed via surgery, and histopathological examination confirmed a double bladder with attached accessory tubular tissue. After antibiotic treatment, the cat recovered uneventfully.

This is the first case of bladder duplication in China and the first case of feline bladder duplication with tubular structure attachment in the world. This information will provide a reference for the diagnosis and treatment of similar cases in the future.