Annals of Indian Academy of Neurology
IMAGES IN NEUROLOGY
Year
: 2022  |  Volume : 25  |  Issue : 4  |  Page : 708--709

Giant stellate “Cord Sign” in cerebral venous sinus thromboses


Praveen Kesav1, Seby John2, Khalid Al-Sharif3, Syed Irteza Hussain2,  
1 Department of Neurology, Neurological Institute, Cleveland Clinic Abu Dhabi, Abu Dhabi, United Arab Emirates
2 Department of Neurology and Neurointerventional Surgery, Neurological Institute, Cleveland Clinic Abu Dhabi, Abu Dhabi, United Arab Emirates
3 Department of Neurology and Hospital Medicine, Neurological Institute, Cleveland Clinic Abu Dhabi, Abu Dhabi, United Arab Emirates

Correspondence Address:
Syed Irteza Hussain
Department of Neurology and Neurointerventional Surgery, Neurological Institute, Cleveland Clinic Abu Dhabi, Abu Dhabi - 112412
United Arab Emirates




How to cite this article:
Kesav P, John S, Al-Sharif K, Hussain SI. Giant stellate “Cord Sign” in cerebral venous sinus thromboses.Ann Indian Acad Neurol 2022;25:708-709


How to cite this URL:
Kesav P, John S, Al-Sharif K, Hussain SI. Giant stellate “Cord Sign” in cerebral venous sinus thromboses. Ann Indian Acad Neurol [serial online] 2022 [cited 2022 Dec 1 ];25:708-709
Available from: https://www.annalsofian.org/text.asp?2022/25/4/708/344690


Full Text



 Introduction and Case History



A 35-year-old previously healthy male with no known medical co-morbidities presented with new-onset persistent headache of 48 h duration, followed by an episode of generalized tonic-clonic seizure. Subsequently, his sensorium further declined requiring intubation and mechanical ventilation. Baseline non-contrast enhanced CT scan (NCCT) of the head revealed a large left frontal cortical intraparenchymal hemorrhage. Hyperdensity was noted within the anterior portion of the superior sagittal sinus, inferior sagittal sinus, as well as multiple cortical veins, draining to the latter, suggestive of a classical “Cord Sign” indicative of an underlying cerebral venous sinus thrombosis (CVST) [Figure 1]a. Contrast-enhanced magnetic resonance (MR) venography of the brain confirmed the presence of dense thromboses of the inferior sagittal sinus as well as the anterior third of the superior sagittal sinus [Figure 1]b. Despite prompt initiation of therapeutic anticoagulation with intravenous heparin infusion, he deteriorated clinically with imaging evidence of hematoma expansion and worsening cerebral edema, eventually requiring decompressive craniotomy and hematoma evacuation. After a prolonged inpatient hospitalization of 70 days, the patient was eventually discharged home with the National Institutes of Health Stroke Scale (NIHSS) of 0 and Modified Rankin Score (mRS) of 1, on therapeutic anticoagulation with oral warfarin. Etiology for CVST was attributed to probable dehydration secondary to long-distance running in the summer season, which he started just a week before the index event, with extensive workup for underlying hypercoagulable state being negative.{Figure 1}

 Discussion



”Cord sign” is considered as a direct imaging marker of CVST on NCCT of the head, with the hyperattenuation of the thrombus within the involved venous sinuses contributing to the cord-like appearance.[1],[2],[3] However, as the thrombus ages, the attenuation characteristics of the latter varies, as evidenced by the transition to iso and later hypoattenuation beyond 7–14 days of thrombus formation.[2],[4] The sensitivity and specificity of the “Cord sign” for diagnosis of CVST was 64.6% and 97.2%, respectively, in a study carried out by Linn et al.[2] False-positive “Cord sign” may occur due to partial volume effects on NCCT due to close proximity of the venous sinuses to the skull and secondary to medical conditions contributing to sluggish venous flow such as polycythemia or hemoconcentration.[5] Hence even though the absence of “Cord sign” on the NCCT head does not rule out the presence of CVST, the presence of a giant “Cord sign” such as depicted in our case, points strongly in favor of the diagnosis of CVST thereby warranting urgent imaging of the venous sinuses for confirmation and timely initiation of treatment to limit morbidity and mortality as well as to achieve favorable outcomes.

Declaration of patient consent

The authors certify that they have obtained all appropriate patient consent forms. In the form the patient(s) has/have given his/her/their consent for his/her/their images and other clinical information to be reported in the journal. The patients understand that their names and initials will not be published and due efforts will be made to conceal their identity, but anonymity cannot be guaranteed.

Financial support and sponsorship

Nil.

Conflicts of interest

There are no conflicts of interest.

References

1Vijay RK. The Cord Sign. Radiology 2006;240:299-300.
2Linn J, Pfefferkorn T, Ivanicova K, Müller-Schunk S, Hartz S, Wiesmann M, et al. Non-contrast CT in deep cerebral venous thrombosis and sinus thrombosis: Comparison of its diagnostic value for both entities. AJNR Am J Neuroradiol 2009;30:728-35.
3Kuo YH, Chao CM, Lai CC. Cord sign in cerebral venous thrombosis. QJM 2018;111:339.
4Canedo-Antelo M, Baleato-Gonzalez S, Mosqueira AJ, Casa-Martinez J, Oleaga L, Vilanova JC, et al. Radiologic clues to cerebral venous thrombosis. Radiographics 2019;39:1611-28.
5Kesav P, Vishnu VY, Sharma A, Khurana D. False-positive 'Cord Sign'. BMJ Case Rep 2013;2013:bcr2013009557.