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KMID : 0361620070420040559
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Journal of the Korean Orthopaedic Association
2007 Volume.42 No. 4 p.559 ~ p.564
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Coincidental Congenital Absence of the Posterior Arch of the Atlas and the Unilateral Lumbosacral Articular Process - A Case Report -
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Jeon Chang-Hoon
Chung Gu-Young
Chung Nam-Soo
Jeong Un-Seob
Lee Dong-Hyun
Cho Jae-Hyun
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Abstract
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We encountered a case of coincidental congenital complete absence of the posterior arch of the atlas and the unilateral lumbosacral articular process. A 21-year-old man presented with pain in the lower back and right buttock. The patient was a swimming coach. On plain radiography, computerized tomography and magnetic resonance imaging, the congenital absence of the unilateral lumbosacral articular process was noted. Six months later, the patient developed severe neck pain and suboccipital headaches without neurological signs. On plain radiography and computerized tomography, the congenital complete absence of the posterior arch of the atlas was noted. Magnetic resonance imaging showed no abnormal signs originating from the posterior spinal cord. There was no segmental instability. For this case, the lower back pain and neck pain were managed by conservative treatment. To the best of our knowledge, this is the first case of a coincidental congenital complete absence of the posterior arch of the atlas and the unilateral lumbosacral articular process.
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KEYWORD
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Congenital anomaly, Articular process, Lumbar spine, Atlas, Posterior arch
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