Ancient schwannoma is a rare variant of schwannoma characterized by histopathologic degenerative changes, which are thought to be the result of long-term tumor growth and aging. However, ancient schwannoma in the spinal canal is particularly rare. We report a case of thoracic spine intradural extramedullary ancient schwannoma in a schizophrenic patient, who kept saying that “something in his back was giving him electric shock” for a long time. Unfortunately, this complaint was misinterpreted as somatic delusion symptoms. A spinal cord tumor was taken into consideration only after paraparesis developed. We have highlighted this case to remind every clinician to remain alert about the possibility of organic disease while treating patients with psychotic disorder history. Thorough neurological examination is required to avoid misdiagnosis. Spinal canal schwannoma can be totally removed successfully with good functional outcome and prognosis.
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