A paracondylar process and early onset cervical osteoarthritis in a California Amerind adult

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• 作者：Elizabeth Weiss
• 关键词：Occipitalization ; Paracondylar process ; Cervical osteoarthritis
• 刊名：International Journal of Paleopathology
• 出版年：December, 2013
• 年：2013
• 卷：3
• 期：4
• 页码：307-309
• 全文大小：1420 K

文摘

Burial 65 is a 25-39-year-old male from a hunter-gatherer California Amerind collection with a large bone spur called a paracondylar process. The process measures 11.92 mm in width and 13.32 mm in length. It is located on the left anteromedial region near the foramen magnum and articulates with a pseudarthrosis to the atlas. The atlas, too, has a pseudarthrosis on the left transverse process. The paracondylar process may be the result of caudal occipitalization, which is a congenital variant that results from a lack of fusion of the occipital bone to the foramen magnum. Trauma is another possible explanation for the occipital-atlas variation. High-impact accidents can cause both atlas and condylar fractures. Regardless of the cause, the paracondylar process and pseudarthrosis likely caused early onset cervical osteoarthritis.