Pediatric emergency medicine trisk 3603 3603

FIGURE 112.22 A: Normal anteroposterior (AP) (open-mouth, odontoid) view of C1 and C2. C
1 , first cervical vertebra (lateral mass); C 2 , second cervical vertebra; T, central incisors
overlying dens (D ); and A, normal relationship between lateral mass of C1 and vertebral body
of C2. B: Jefferson fracture in AP view. Note lateral offset of C1 on C2 (arrows ). C: Jefferson
fracture. Computed tomography coronal view. Note three distinct fractures (arrows ) and
bursting nature of injury. D: Pseudo-Jefferson fracture of childhood in a 3-year-old child
because of disparate growth of C1 and C2 and cartilage artifact (arrows ). E: Pseudo-Jefferson
fracture demonstrating marked offset of the lateral masses of C1 on C2 (arrows ). (B , C :
Reprinted with permission from Swischuk L. Emergency Radiology of the Acutely Ill or Injured
Child . 2nd ed. Baltimore, MD: Williams & Wilkins; 1986:591. D : From Aslamy W, Danielson
K, Hessel S, et al. A 3-year-old boy with neck pain after motor vehicle accident. West Med J
1991;155(3):301–302. Copyright BMJ Publishing Inc. Reprinted with permission.)