title: Myelopathy in infancy complicating congenital atlantoaxial dislocation.
abstract: Two infants had congenital atlantoaxial dislocation associated with myelopathy. One of them, a 3-month-old girl, showed anterior dislocation of the atlas on the axis, and had extreme weakness of the extremities. Another patient, an 8-month-old boy, showed tetraplegia, and posterior dislocation with absent odontoid process was demonstrated radiologically. These cases add another cause to the varied etiologies of floppiness in early infancy.
mesh_terms: D001368:Axis, Cervical Vertebra / Q000002:abnormalities / Q000000981:diagnostic imaging; D001270:Cervical Atlas / Q000002:abnormalities / Q000000981:diagnostic imaging; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D004204:Joint Dislocations / Q000150:complications / Q000151:congenital* / Q000000981:diagnostic imaging; D008297:Male; D009123:Muscle Hypotonia / Q000209:etiology; D011859:Radiography; D013118:Spinal Cord Diseases / Q000209:etiology*; D013122:Spinal Diseases / Q000151:congenital* / Q000000981:diagnostic imaging / Q000209:etiology