[Radiological demonstration of an intradural epidermoid cyst rupture].

We report an unusual lumbar intradural epidermoid cyst found in an eight-year-old boy. At the age of 11 months, the child had one lumbar puncture to exclude possible meningitis, but seven years later he was experiencing pain. Lumbar myelography showed three intradural lesions, two of which were mobile in the subarachnoid space. Surgery revealed the presence of a single epidermoid ruptured cyst with free detached subarachnoid fragments, the dissemination of which had not caused aseptic meningitis.