Bone mineral density in patients with ossification of the posterior longitudinal ligament in the cervical spine |
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Authors: | Tsuneto Yamauchi Eiji Taketomi Shunji Matsunaga Takashi Sakou |
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Institution: | (1) Department of Orthopedic Surgery, Faculty of Medicine, Kagoshima University, 8-35-1 Sakuragaoka, Kagoshima 890-0005, Japan, JP |
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Abstract: | Bone mineral density (BMD) has not been clearly determined in patients with ossification of the posterior longitudinal ligament
(OPLL) in the cervical spine. BMD in patients with OPLL was measured in the third vertebral body in the lateral projection
and in the distal part of the radius in the anteroposterior projection using dual-energy X-ray absorptiometry (DXA). Patients
with OPLL had significantly higher BMD than healthy controls in both the lumbar spine and radius. Observing BMD by gender
and age group, high BMD was recognized especially in female patients over 60 years of age. Significantly increased BMD was
observed in patients with ankylosing spinal hyperostosis (ASH) in addition to OPLL. These findings suggest that patients with
OPLL may tend to develop systemic hyperostosis, leading to the pathological ectopic ossification observed in OPLL.
Received: July 7, 1998 / Accepted: March 17, 1999 |
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Keywords: | : OPLL DXA BMD ASH |
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