Figure 2
From: Strong relationship between dyslipidemia and the ectopic ossification of the spinal ligaments
Criteria for the identification of OLF and OPLL on computed tomography. (a) OLF that is clearly visible but less than 3 mm in thickness (white arrowheads). (b) OLF with an apparent thickness of 3 mm or more (black arrowheads). (c) A mushroom-shaped OLF that is localized at the center of the laminae (white arrow). (d,e) OPLL with an apparent thickness of 2 mm or more (black arrow). (f) OPLL that is small but with a thickness of 2 mm or more (bold white arrow). OLF, ossification of the ligamentum flavum; OPLL, ossification of the posterior longitudinal ligament.
