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CSF cytology and HIV serology were both negative. EMG, however, confirmed the clinical findings of polyradiculopathy. T1W and T2W MRI of the lumbar spine demonstrated diffuse thickening of the nerve roots of the cauda equina, which enhanced following intravenous gadolinium administration (Figs. 1 and 2). No parenchymal involvement was seen.
The tibia and fibula are the most common locations. The epicenter is cortical. The appearance consists of diffuse, mature cortical thickening. Severe venous insufficiency or venous ectasia can result in tibial or fibular cortical thickening secondary to mature periosteal bone formation (Fig 27).Venous stasis is probably the most common cause of diffuse cortical thickening in the tibia.tress fracture occurs at all ages, and there is no sex predilection. The location is diaphyseal in the tibia, and the epicenter is eccentric. The appearance consists of smooth cortical thickening, sometimes associated with lucent foci.