title: Pyloric duplication masquerading as hypertrophic pyloric stenosis.
mesh_terms: D000013:Congenital Abnormalities / Q000175:diagnosis; D003937:Diagnosis, Differential; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D011707:Pyloric Stenosis / Q000175:diagnosis*; D011708:Pylorus / Q000002:abnormalities* / Q000601:surgery