• Neurol. Med. Chir. (Tokyo) · Jan 2010

    Case Reports

    Cervical myelopathy caused by atlas osteochondroma and pseudoarthrosis between the osteochondroma and lamina of the axis: case report.

    • Naohisa Miyakoshi, Michio Hongo, Yuji Kasukawa, and Yoichi Shimada.
    • Department of Orthopedic Surgery, Akita University Graduate School of Medicine, Akita, Japan. miyakosh@doc.med.akita-u.ac.jp
    • Neurol. Med. Chir. (Tokyo). 2010 Jan 1; 50 (4): 346-9.

    AbstractA 58-year-old man presented with a 6-month history of progressive cervical myelopathy. Magnetic resonance imaging and computed tomography of the cervical spine revealed a bone tumor arising from the posterior arch of the atlas and osteophytes at a pseudoarthrosis between the tumor and the lamina of the axis, resulting in marked spinal cord compression. The patient's symptoms resolved after en bloc resection of the tumor and removal of the osteophytes. The histological diagnosis was osteochondroma. The primary cause of myelopathy in the present case was osteochondroma arising from the posterior arch of the atlas, but the osteophyte formations appearing at the pseudoarthrosis between the atlas osteochondroma and the lamina of the axis might also have contributed to the symptoms, which appeared when the patient was in his late 50s.

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