Plexiform neurofibroma of the cauda equina: case report.

Background: Plexiform neurofibromas are rarely found in the cauda equina. The most recent report of a plexiform neurofibroma of the cauda equina noted only 2 previously described cases.
Case Description: To these we add the current case, as well as 2 additional previously published cases. We report the case of a 44-year-old man with a sudden exacerbation of his long-standing lower-back and bilateral leg pain. An intradural lesion was seen on magnetic resonance imaging and he underwent surgery. Intraoperatively, there were swollen nerve roots and tumor insinuating itself between the roots. A biopsy was performed, and pathology findings were consistent with plexiform neurofibroma.
Conclusions: Plexiform neurofibroma of the cauda equina is a rare tumor, with variable manifestations. These tumors are not amenable to complete resection. Surgical treatment consists of either partial resection or biopsy, possibly with dural grafting for decompression.