Intramedullary Solitary Fibrous Tumor of the Thoracic Spinal Cord—A Case Report

Solitary fibrous tumor (SFT) is a spindle cell tumor, derived from mesenchymal cells, that arises most commonly in the pleura. Cases of SFT in the central nervous system, both intracranial and intraspinal, have been reported. We report a case of an intramedullary primary SFT of the thoracic spinal cord. A 65-year-old man presented with a 5-year history of lower back and left leg pain and 5-month history of rapid progressive weakness of the left lower leg. Thoracic magnetic resonance imaging indicated an intradural tumor at the Th8level. Intraoperative findings revealed that the tumor arose from an intramedullary site and had no attachment with the arachnoid membrane and dura mater. Histological examination and immunohistochemical staining confirmed the diagnosis of SFT. Although intramedullary SFT is rare, SFT should be considered during the differential diagnosis of intramedullary tumor.