Symptomatic sacral extradural arachnoid cyst associated with lumbar intradural arachnoid cyst

A case of sacral extradural arachnoid cyst associated with lumbar intradura l arachnoid cyst in a 35-year-old male is reported. The patient presented w ith a history of severe sacrococcygeal pain, constipation, and dysuria for several months. Computed tomographic (CT) myelograms and magnetic resonance imaging (MRI) scans showed a huge sacral cyst without neural components. A favorable outcome could be achieved by decompression of the cyst, oblitera tion of the fistulous channel between the cyst and the thecal sac, and fene stration of the arachnoid cyst into the subarachnoid space. The relevant li teratures are also reviewed. (C) 1999 Elsevier Science B.V. All rights rese rved.