EN
This study reports the case of a 4-year-old female Mastiff dog in which a congenital urachal diverticulum was diagnosed. The disorder was related with atypical clinical manifestations. The animal was referred for a radiological evaluation with the clinical signs of ataxia. The owner stated that the symptoms improved after each spontaneous micturition of a dog. The radiological study revealed the presence of degenerative changes in the lumbosacral spine. Moreover, an abnormal shape of the urinary bladder in the abdominal cavity was observed. The ultrasound imaging showed a large diverticulum in the cranioventral part of bladder. The operative procedure and histopathological analyses have confirmed the presence of a urachal diverticulum. The clinical symptoms completely abated after the surgery.