mesh_terms: D002648:Child; D002675:Child, Preschool; D004733:Enema; D005260:Female; D006801:Humans; D007223:Infant; D007443:Intussusception / Q000000981:diagnostic imaging* / Q000473:pathology / Q000628:therapy*; D008297:Male; D012189:Retrospective Studies; D013223:Statistics as Topic; D016896:Treatment Outcome; D014463:Ultrasonography / Q000379:methods*