RÉSUMÉ
Duplication anomalies of the alimentary tract often present with myriad clinical symptoms and signs. There have been no reports of haemoptysis as the presenting feature and oesophageal duplication cyst is not considered as a cause for haemoptysis. An infant presented with this unusual manifestation. Chest X-ray showed persistent right upper zone haziness and contrast enhanced computed tomographic scan showed a multiloculated mass on the right side of the chest. The cystic mass was excised via a right thoracotomy and dense adhesions were noted with the oesophagus. The postoperative period was uneventful and histopathological examination revealed it to be a duplication cyst with ectopic gastric mucosa. Thus, the diagnosis was made retrospectively.