The clinico-radiological spectrum of isolated cortical vein thrombosis.

Isolated cortical vein thrombosis (ICVT) in the absence of sinus or great venous involvement is rare. Various MRI sequences have been proposed for diagnostic accuracy, although follow-up data are limited. The optimal management strategy remains uncertain. Patients with ICVT treated between 2006 and 2008 were retrospectively studied. Diagnostic and follow-up neuroimaging were reviewed independently, and we evaluated their treatment and outcomes. Five patients (mean age 41 years; range, 25-54 years) were included. All presented with seizures. Focal neurological deficits were noted in one patient only. T2 susceptibility-weighted MRI abnormalities were observed in all patients. T2-weighted parenchymal hyperintensities involving the cortical-subcortical regions around the ICVT had completely resolved on follow-up scans. Clinical outcomes were uniformly good, despite variable treatment strategies. We observed significant, yet reversible, parenchymal T2-weighted MRI lesions in our patients with ICVT. Follow-up clinical and radiological studies demonstrate recovery independent of treatment regimes. T2-weighted MRI was found to be a useful diagnostic tool and might improve diagnostic accuracy in carefully selected patients with new-onset seizures.