Radiographic comparison between male and female patients with lumbar spondylolysis

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  • Takao Shoichiro
    Department of Radiologic Science and Technology, Institute of Health Biosciences, the University of Tokushima Graduate School
  • Sakai Toshinori
    Department of Orthopedics, Institute of Health Biosciences, the University of Tokushima Graduate School
  • Sairyo Koichi
    Department of Orthopedics, Institute of Health Biosciences, the University of Tokushima Graduate School
  • Kondo Tadashi
    Department of Medical Imaging Informatics, Institute of Health Biosciences, the University of Tokushima Graduate School
  • Ueno Junji
    Department of Radiologic Science and Technology, Institute of Health Biosciences, the University of Tokushima Graduate School
  • Yasui Natsuo
    Department of Orthopedics, Institute of Health Biosciences, the University of Tokushima Graduate School
  • Nishitani Hiromu
    Department of Radiology, Institute of Health Biosciences, the University of Tokushima Graduate School

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We studied the lumbar spines of 117 adults (39 women and 78 men) with spondylolysis unrelated to low back pain using multidetector computed tomography (CT). Of the 117 subjects with spondylolysis, including five with multiple-level spondylolysis, there were 124 vertebrae with spondylolysis. In adult lumbar spines with unilateral spondylolysis, there was no significant difference between the incidence of spondylolisthesis in female and male subjects. However, in those with bilateral spondylolysis, there was a significantly higher incidence of spondylolisthesis in female subjects (90.9%) than in males (66.2%). Furthermore, females with bilateral spondylolysis had significant more slippage than males. Lumbar index and lumbar lordosis were not significantly different between male and female subjects, and did not significantly correlate with slippage. In conclusion, to treat acute spondylolysis in adolescents, it is important to obtain bony union at least unilaterally, especially in female subjects, to prevent further slippage. J. Med. Invest. 57: 133-137, February, 2010

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