*'''Sliding hiatal hernia''' - Cranial displacement of the distal oesophagus and stomach into the mediastinum through the oesophageal hiatus of the diaphragm. This is the most common form and it can occur in the dog and cat as a congenital or acquired lesion. Congenital hernias result from the incomplete fusion of the ''septum transversum'' (which forms the diaphragm) during early embryonic development. | *'''Sliding hiatal hernia''' - Cranial displacement of the distal oesophagus and stomach into the mediastinum through the oesophageal hiatus of the diaphragm. This is the most common form and it can occur in the dog and cat as a congenital or acquired lesion. Congenital hernias result from the incomplete fusion of the ''septum transversum'' (which forms the diaphragm) during early embryonic development. |