Cord sign (dural sinus thrombosis)
Updates to Article Attributes
Title
was changed:
Cord sign (dural sinus thrombosis)
Body
was changed:
The cord sign refers to cordlike hyperattenuation within a dural venous sinus on non-contrast enhanced CT of the brain due to dural venous sinus thrombosis. The sign is most commonly seen in the transverse sinus because along the origin of thetentorium it runs approximately approximately in the axial plane such such that it is visible on one image.
It is important to appreciate that normal blood within the dural sinuses is usually of slightly increased density relative to brain parenchyma and that true hyperdensity is the key to recognising thrombosis. A false positive cord sign may also be seen in the setting of generalised cerebral oedema when it is actually the brain which is of reduced density rather than the sinus being hyperdense.
-<p>The <strong>cord sign</strong> refers to cordlike hyperattenuation within a <a href="/articles/dural-venous-sinuses">dural venous sinus</a> on non-contrast enhanced CT of the brain due to <a href="/articles/dural-venous-sinus-thrombosis">dural venous sinus thrombosis</a>. The sign is most commonly seen in the <a href="/articles/transverse-sinus">transverse sinus</a> because along the origin of the <a href="/articles/tentorium-cerebelli">tentorium</a> it runs approximately in the axial plane such that it is visible on one image. </p><p>It is important to appreciate that normal blood within the dural sinuses is usually of slightly increased density relative to brain parenchyma and that true hyperdensity is the key to recognising thrombosis. A false positive cord sign may also be seen in the setting of generalised <a href="/articles/cerebral-oedema-1">cerebral oedema</a> when it is actually the brain which is of reduced density rather than the sinus being hyperdense. </p>- +<p>The <strong>cord sign</strong> refers to cordlike hyperattenuation within a <a href="/articles/dural-venous-sinuses">dural venous sinus</a> on non-contrast enhanced CT of the brain due to <a href="/articles/dural-venous-sinus-thrombosis">dural venous sinus thrombosis</a>. The sign is most commonly seen in the <a href="/articles/transverse-sinus">transverse sinus</a> because along the origin of the <a href="/articles/tentorium-cerebelli">tentorium</a> it runs approximately in the axial plane such that it is visible on one image. </p><p>It is important to appreciate that normal blood within the dural sinuses is usually of slightly increased density relative to brain parenchyma and that true hyperdensity is the key to recognising thrombosis. A false positive cord sign may also be seen in the setting of generalised <a href="/articles/cerebral-oedema-1">cerebral oedema</a> when it is actually the brain which is of reduced density rather than the sinus being hyperdense. </p>
Unable to process the form. Check for errors and try again.