A 10-week-old, 4.5 kg female Weimaraner dog was referred to the Chonbuk National University, Animal Medical Centre with signs of regurgitation after weaning. The cervical oesophagus was palpable as a flaccid, air-filled cavity. The thoracic radiographs revealed oesophageal dilatation cranial to the heart and constriction at the level of third rib. A presumptive diagnosis was made as persistent ...