Spine
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This article describes a patient with transdural lumbar disc herniation. The patient fits the average criteria for intradural lumbar disc herniations. ⋯ The volume of extruded matter was greater and caused greater neurologic damage than that observed in intradural disc herniations. The authors know no previous cases of transdural disc herniations.
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A patient with idiopathic hypertrophic spinal pachymeningitis (HSP) with predominant involvement of the cervical and thoracic dura is reported. Serial magnetic resonance (MR) images detected isolated thickening and ridges of the dura mater. There has been no report describing the serial changes of MR images in idiopathic HSP. ⋯ Idiopathic HSP is a rarely reported disease that can resemble other disorders associated with dural compression. MR imaging can help to differentiate it from other disorders, and enables the diagnosis of the disease in its early stage. The prognosis of idiopathic HSP with positive inflammatory signs may be worse; the authors stress the significance of early surgical treatment.