<p>Axial section computed tomography scan demonstrating
</p>
hyperdensity in the left sigmoid sinus
P Thomas et al.
CC BY 2.0
<p>Sigmoid sinus thrombosis presenting with posterior alexia in a patient with Behcet's disease and polycythaemia: a case report. P Thomas, A Keightley, R Kamble, N Gunasekera, M R Johnson
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Journal of Medical Case Reports 2008, 2:175 (23 May 2008). <a href="//doi.org/10.1186/1752-1947-2-175" class="extiw" title="doi:10.1186/1752-1947-2-175">doi:10.1186/1752-1947-2-175</a>