To clarify the role of mechanical factors in the pathogenesis of the ossification of the posterior longitudinal ligament (OPLL), we investigated the cervical posture of 32 patients with OPLL and 18 patients with cervical spondylotic myelopathy (CSM) in their daily life.All patients were examined directly in our hospital.Patients with OPLL maintained their carvical spine in the anterior flexed position significantly longer than patients with CSM.

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We experienced two cases of pustuloticarthro-osteitis (PAO) with hyperostosis. The first case was a sixty-year-old female who developed a protrusion in the left sternocastoclaiclar side with pain and swelling.Pathological finding following biopsy of the protrusion revealed inflammatory granulation tissue. After admission, she had pusturosis palmaris et plantaris (p.p.p) and diagnosed her as having PAO.The second case was a forty-six-year-old female who presented with a protrusion on the left side of her sternocastoclavicular joint with pain and swelling in addition to fever and neck pain.She showed abnormal X-rays in the spine, and sternocastoclavicular joint. Pathological biopsy findings of the protrusion revealed inflammatory granulation tissue. After admission, she had P.P.P. thus we diagnosed this case as PAO.

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