Cord sign (dural sinus thrombosis)
Citation, DOI, disclosures and article data
At the time the article was created Andrew Dixon had no recorded disclosures.View Andrew Dixon's current disclosures
At the time the article was last revised Brendon Friesen had no recorded disclosures.View Brendon Friesen's current disclosures
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 the tentorium it runs approximately in the axial plane 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 recognizing thrombosis. A false positive cord sign may also be seen in the setting of generalized cerebral edema when it is actually the brain which is of reduced density rather than the sinus being hyperdense.
- 1. Vijay RK. The cord sign. Radiology. 2006;240 (1): 299-300. doi:10.1148/radiol.2401031739 - Pubmed citation
- 2. Bousser MG, Ferro JM. Cerebral venous thrombosis: an update. Lancet Neurol. 2007;6 (2): 162-70. doi:10.1016/S1474-4422(07)70029-7 - Pubmed citation
- 3. Kitamura Y, Hara K, Tsunematsu K. Isolated superficial sylvian vein thrombosis with long cord sign: case report and review of the literature. Neurol. Med. Chir. (Tokyo). 2015;54 (3): 253-9. Pubmed citation
- 4. Kesav P, Vishnu VY, Sharma A et-al. False-positive 'cord sign'. BMJ Case Rep. 2013;2013 (apr23 1): . doi:10.1136/bcr-2013-009557 - Free text at pubmed - Pubmed citation