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Reumatologia/Rheumatology
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6/2018
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Case report

Near-complete recanalization of jugular vein and multiple dural sinus thromboses with warfarin in a case of antiphospholipid syndrome

Ufuk İlgen
,
Sezin Turan
,
Hakan Emmungil

Reumatologia 2018; 56, 6: 406-408
Online publish date: 2018/12/23
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Introduction

Antiphospholipid syndrome (APS) is responsible for about 10% of hypercoagulable states in the young adult population [1]. In a large multinational observational study, APS was found to constitute 5.9% of cases of dural sinus thrombosis [2]. Although dural sinus thrombosis is a relatively rare complication of antiphospholipid syndrome, it is a potential cause of morbidity and mortality. Extension of thrombosis and involvement of deep venous structures are poor prognostic factors and are associated with complications such as venous infarction, epilepsy, and increased intracranial pressure in patients with dural sinus thrombosis, but the rate of near-complete recanalization is not known in APS-related dural sinus thrombosis [2, 3].
Warfarin was shown to be of benefit both in secondary prophylaxis in patients with APS and in the management of patients with dural sinus thrombosis [4, 5].

Case report

A 38-year-old woman had sudden onset severe headache with no other sign of increased intracranial pressure. Vital signs, systemic and neurological examinations were normal. Intracranial hemorrhage was excluded with computed tomography. Cranial magnetic resonance (MR) imaging was suggestive of dural sinus thrombosis and MR venography revealed total thrombosis in the superior sagittal, right transverse, right sigmoid, straight sinuses, and the great cerebral and right internal jugular veins (Fig. 1 A, B).
The distal part of the left transverse sinus was also totally thrombosed. Treatment with warfarin was started after an initial course of heparin. Tests for genetic thrombophilia were negative with no history of smoking or oral contraceptive use. The patient had a high titer of serum anti-2-glycoprotein I IgG (87.2 GPL U/ml) and moderately elevated anticardiolipin in IgG class gamma globulins (32.5 GPL U/ml). Lupus anticoagulant (LAC) was negative and serum anticardiolipin in IgM class and anti 2-glycoprotein I IgM were normal. In conclusion, the patient presents double positivity in antiphospholipid antibodies. Complete blood count, serum biochemistry and urinary examination were normal. No symptom, sign or immunological feature suggesting systemic lupus erythematosus was present. After five months of treatment with warfarin with an international normalized ratio (INR) of 2.5–3, control MR venography revealed near-complete recanalization of dural sinuses and the right internal jugular vein (Fig. 1 C, D).
High titer anti-2-glycoprotein I IgG and moderately elevated anticardiolipin IgG persisted (85 and 31 GPL U/ml, respectively) five months after the first measurement and antiphospholipid syndrome was diagnosed. No history of pregnancy was present. She is still being followed up under warfarin without any symptoms.

Discussion

Near-complete recanalization of such an extensive cerebral venous thrombosis is thought to be rare, especially when accompanied by a systemic thrombotic disorder and poor prognostic features, although no cohort of dural sinus thrombosis or APS-related thrombosis has been assessed with respect to this issue to date. In previous studies researchers found that double positivity, which means 2-GPI antibodies and LAC presence, is a triggering factor of arterial thrombosis; therefore low positivity may cause venous thrombosis [6, 7]. However, the described patient had aCL and 2-GPI antibodies. Recently it has been highlighted that the positivity to IgA anti-2GPI antibody was clinically relevant in APS patients [8], although the association between thrombosis and aCL or a2-GPI is not so obvious as between LAC or triple positivity (aCL + LAC + a2-GPI antibodies) [8, 9].
The APS diagnosis is based on the new Sydney criteria, which suggest performing laboratory tests at least 12 weeks after the clinical symptoms (thrombosis), and also the time interval cannot be more than 5 years between the clinical symptoms and the test to make the diagnosis of APS [10].
It is a matter of debate whether a relatively high INR, unintentionally kept between 2.5 and 3 in the present case, contributed to near-complete resolution of thrombosis, since high-intensity anticoagulation with warfarin (INR 3–4) was not shown to be superior to moderate intensity anticoagulation (INR 2–3) in terms of thromboprophylaxis [11].

Conclusions

The prognosis of APS-related dural sinus thrombosis is largely unknown. Anticoagulation with warfarin, shown to be effective both in secondary prevention in patients with APS and in the treatment of patients with dural sinus thrombosis [4, 5], is still the mainstay of management in APS-related dural sinus thrombosis, since new oral anticoagulants are not proven to be more effective or safer in APS [12].

Acknowledgements

Written informed consent was obtained from the patient.

The authors declare no conflict of interest.

References

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Copyright: © 2018 Narodowy Instytut Geriatrii, Reumatologii i Rehabilitacji w Warszawie. This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) License (http://creativecommons.org/licenses/by-nc-sa/4.0/), allowing third parties to copy and redistribute the material in any medium or format and to remix, transform, and build upon the material, provided the original work is properly cited and states its license.






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