Abstract:
An under-sized 3 month old female bull terrier was referred with a history of regurgitation
since 3 days of age. Thoracic radiographs were unremarkable, while abdominal radiographs
showed a distended stomach, despite a 12 hour fast. Abdominal ultrasonography revealed
gastric outflow obstruction of unclear aetiology. Coeliotomy was performed, during which an
excessive mucosal fold at the pyloric antrum was excised. Histopathology of the pyloric fold
revealed mild oedema and fibrosis of the mucosal tissue. The dog made a complete recovery,
with resolution of regurgitation and grew to within the expected breed size. In the authors’
opinion, this is the first canine report of congenital antral mucosal valve resulting in gastric
outflow obstruction, and only the second report in any species.
