Lumbar Epidural Angiolipoma with Relatively Poor Mass Sign on Neuro-imaging : A Case Report

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  • Mass signの乏しかった腰椎硬膜外angiolipomaの1例

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A 44-year-old woman was admitted to our department because of recurrent lumbago. On examination, no apparent neurological deficits were noticed. Plain X-ray films showed no spina bifida. Myelography showed no apparent abnormality. Plain CT scan showed a mildly hyperdense mass at the lateral recess of L 5 level. T1-WI of MRI showed an iso-intensity mass at the L 5 vertebral body, which was homogeneously enhanced. At operation, an extradural tumor was totally removed. Histologically, the tumor was composed of fatty tissues and thin-walled vessels, diagnosed as spinal angiolipoma. Forty-nine reported cases of spinal angiolipoma were reviewed. Spinal angiolipomas occur at the mid-thoracic level with high incidence. Only 4 cases of spinal angiolipoma were reported in the lumbar level.

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