Non-communicating gastric duplication cyst in a 10-week-old Labrador Retriever puppy

A 10-week-old male Labrador Retriever puppy was presented for acute onset of vomiting over a 48-h period. Ultrasound examination showed a cystic structure in the area of the pylorus that was impinging on gastric outflow. Surgery was performed to resect this structure. Histological examination showed the cystic structure to be composed of gastric mucosa surrounded by a smooth muscle wall. This finding, together with the intraoperative observations, led to a definitive diagnosis of a non-communicating gastric duplication cyst.

Although rare, gastric duplication cyst is a differential diagnosis for acute-onset vomiting in a young dog. This report should aid in the decision-making process in future cases.