title: Achalasia in monozygotic twins.
abstract: The familial occurrence of achalasia has been previously recorded and a genetic origin for the disease has been postulated. We present the first case of achalasia in monozygotic twins and suggest that concordance for the disease is consistent with a genetic factor in the etiology of achalasia.
mesh_terms: D000328:Adult; D004200:Diseases in Twins; D004931:Esophageal Achalasia / Q000000981:diagnostic imaging / Q000235:genetics*; D005260:Female; D005808:Genes, Recessive; D006801:Humans; D011247:Pregnancy; D011859:Radiography; D013997:Time Factors; D014427:Twins; D014430:Twins, Monozygotic