[Functional pyloric stenosis in sheep]

The clinical findings, the autopsy and the histology of functional pyloric stenosis in three sheep between four and eight years old are described. A chronic ulcer with structural alterations of the pyloric protuberance was found in the first animal. In the second sheep there were several polyps in the pylorus, and in the third erosions throughout the whole pylorus, and a few hyperplastic areas of epithelium at the junction between pylorus and duodenum. The abomasum was moderately to extremely congested and the contents weighed between 6.7 and 13 kg. In addition to these findings chronic and unspecific abomaso-duodenitis was found in all three sheep. These three cases can be attributed to the distal functional pyloric stenosis (Hoflund syndrome).