Fig. 11
From: The craniocervical junction: embryology, anatomy, biomechanics and imaging in blunt trauma
Calcification of the alar ligament: coronal reformatted CT image of the craniocervical junction performed as part of a trauma CT assessment of a 59-year-old male driver involved in motor vehicle collision complaining of neck pain on presentation to hospital. The well-circumscribed nature of this nodular area of calcification/ossification in the left alar ligament helps to discriminate this lesion from a fracture