esophageal disorder tubular duplication of the esophagus https://www.malacards.org/card/tubular_duplication_of_the_esophagus Orphanet:100048 MEDGEN:897945 GARD:0019745 Tubular duplication of the esophagous is a rare congenital malformation where a second structure with individual lumen and stratified squamous mucosa and muscularis mucosa lies within or adjacent to the true esophagus causing dysphagia, nausea, vomiting, retrosternal pain and respiratory problems (stridor and recurrent pneumonia) and usually presenting in children. MONDO:0015051 UMLS:C4274729