title: Butterfly C2 vertebra: an unusual finding in a case of os odontoideum.
authors.affiliation: Department of Neurosurgery, Postgraduate Institute of Medical Education and Research, Chandigarh, India.
authors.forename: Devi Prasad
authors.initials: DP
authors.lastname: Patra
authors.forename: Pravin
authors.initials: P
authors.lastname: Salunke
authors.forename: Gobinda
authors.initials: G
authors.lastname: Pramanick
mesh_terms: D002574:Cervical Vertebrae / Q000002:abnormalities / Q000473:pathology / Q000601:surgery; D002648:Child; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D009809:Odontoid Process / Q000002:abnormalities* / Q000473:pathology / Q000601:surgery*