Abstract
We report on a case of a mobile schwannoma of the cauda equina. The patient was a 24-year-old woman who visited our hospital with the chief complaints of low back pain and numbness of the right leg. A tumor was noted from the L2 midbody level to the L3 upper endplate on preoperative MRI and myelogram. During the surgery, a right L2 hemilaminectomy was performed, and the dura was incised, but no tumor was founded in the surgical field, and this was noted as a missing tumor. Intraoperative myelography showed that the tumor had moved to the adjacent vertebra on the caudal side. Myelography applied again to the caudal side of the mobile tumor. Then, the tumor had moved upward, and could be excised without an additional laminectomy.
Highlights
The spinal schwannoma is the most common intradural extramedullary neurogenic tumor
We report on a case of a mobile schwannoma of the cauda equina
A right L2 hemilaminectomy was performed, and the dura was incised, but no tumor was founded in the surgical field, and this was noted as a missing tumor
Summary
The spinal schwannoma is the most common intradural extramedullary neurogenic tumor. It arises from nerve root sheath that is relatively well marginated with little attachment or adhesion to surrounding tissue. Schwannoma with abnormal mobility is rare, and only 43 cases have been reported including our patient [1]-[17]. These reports were limited to cases confirmed on preoperative examination, and many tumors may have been excised without noticing that they were mobile. Previous papers have reported that additional laminectomies or resurgery have been required to remove the mobile tumor [1] [2] [3] [6] [7] [8] [11] [13] [14] [18]. The tumor was found and could be excised without an additional laminectomy
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