1990 Volume 39 Issue 1 Pages 246-248
15 patients with ossification of the posterior longitudinal ligament (OPLL) in the cervical spine were examined with 3 dimensional computed tomography (CT). During 3 dimensional CT examinations, 3 different types of ossification were observed. Radiologically continuous type and continuous region of mixed type ossification were semicylindric or semi-spindle shaped that were associated with large width and thickness laterally. Radiologically segmental type and segmental region of mixed type ossification were thin semi-cylindric shape that were localized in the center of posterior aspect of the vertebral body.
