====== Ranawat criterion ======

The Ranawat [[Criterion]] is the distance between the center of the [[C2]] [[pedicle]] and the transverse axis of C1 measured along the axis of the [[odontoid process]].
((Ranawat CS, O'Leary P, Pellicci P, et al. Cervical Spine Fusion in Rheumatoid Arthritis. J Bone Joint Surg. 1979; 61A:1003–1010)).

{{::ranawat_c1-2.jpg|}}

[[Cervical spine]] is the third most common location of lesions in the course of [[rheumatoid arthritis]]. Pathological lesions in cervical spine structure are observed in 44–86% of patients with RA