Intradural spinal lipoma of the conus medullaris without spinal dysraphism

A 42-year-old man suffering from progressive left radicular sensory motor l oss (L4 level) underwent neurosurgical repair. Neuroimaging (RMI) had led t o the diagnosis of schwannoma of the filum terminale with lipomatous compon ent. Histological examination visualized a true mature lipoma associated wi th numerous bundles of more or less dystrophic nerve fibers. This histologi cal benign tumor raised the problem of the genesis of intradural lipomas of spinal cord.