[An etiological study of an infantile type of achalasia].
D000293:Adolescent; D001980:Bronchi / Q000002:abnormalities; D002648:Child; D002675:Child, Preschool; D004931:Esophageal Achalasia / Q000209:etiology*; D004940:Esophageal Stenosis / Q000151:congenital* / Q000175:diagnosis; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male