Spinal meningiomas account for 12% of all the meningiomas and are usually located in the intradural extramedullary space. In some cases, they are associated with some extradural extensions. However, purely extradural spinal meningiomas are rare. Additionally, it is difficult to make an accurate preoperative diagnosis. We report a case of pathologically confirmed atypical meningioma, presented as a posterior epidural mass on the thoracic spine. We review the case, clinical symptoms, radiologic findings and the histologic features.