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Multimodal Imaging Follow-up of a Thrombosed Developmental Venous Anomaly: CT, CT Angiography and Digital Subtraction Angiography

Article information

Neurointervention. 2013;8(2):120-124
Publication date (electronic) : 2013 August 29
doi : https://doi.org/10.5469/neuroint.2013.8.2.120
1Department of Radiology, Chungbuk National University Hospital, Cheongju, Korea.
2Department of Neurosurgery, Chungbuk National University Hospital, Cheongju, Korea.
Correspondence to: Sang-Hoon Cha, MD, PhD, Department of Radiology, Chung Buk National University Hospital, 1 Circle Rd. 776, Heungduk-gu, Cheongju 361-711, Korea. Tel. 82.43.269.6473, Fax. 82.43.269.6479, shcha@chungbuk.ac.kr
Received 2013 June 07; Accepted 2013 June 20.

Abstract

We report a rare case of thrombosed developmental venous anomaly (DVA) in a 31-year old male with hemorrhagic cerebral venous infarction at the initial clinical presentation. In this case, sequential CT, CT angiography and digital subtraction angiography demonstrated thrombotic obstruction of the venous drainage from DVA, its progressive recanalization and temporal evolution of the affected brain parenchyma. The relevant previous literatures were reviewed and summarized.

Dilated medullary veins and a prominent draining venous structure constitute a typical developmental venous anomaly (DVA) and it is considered as a benign entity because it barely is associated with any neurological presentations [1]. DVAs associated with arteriovenous shunt causing intracerebral hemorrhages (ICHs) were reported but they are very rare [2-4], and atypical parenchymal type of arteriovenous malformation (AVM) mimicking DVAs were categorized only recently [5]. These clearly suggest DVAs are not a homogenous group of clinical benignancy, rather a diverse vascular anomaly with various findings.

Thrombosis of a DVA is extremely rare, 21 DVAs with thrombosis in the collecting veins were reported in the previous literatures [1, 6]. Those cases included 18 supratentorial and three infratentorial cases and showed image findings at initial diagnostic brain imaging mostly. But, serial changes during resolution and recanalization of the thrombosed DVA had not been documented with multimodal image findings.

We present a case of symptomatic DVA presented with hemorrhagic cerebral venous infarction in which repeated multimodal imaging clearly showed temporal changes of the thrombosed collecting vein and the affected brain.

CASE REPORT

A 31-year-old male presented with loss of consciousness of abrupt onset after several days of headache. Initial pre-contrast CT showed swollen hypodense area, ICHs and linear hyperdensity in the left frontal lobe (Fig. 1A). CT angiography with 3-dimensional post processing revealed dilated medullary veins with caput medusa appearance, but no venous drainage from the left frontal DVA) (Fig. 1B-D). Multiplanar source images of CT angiography demonstrated the filling defect in the anterior superior sagittal venous sinus and suggested the thrombosis in the draining vein (Fig. 1C). On follow-up CT angiograms ten days (not shown in this report) and two months later (Fig. 2B, C), thrombosed draining vein was progressively recanalized and detected were findings of venous infarction with multifocal parenchymal hemorrhages in the left frontal lobe. Repeated digital subtraction angiography two years after the initial clinical presentation (Fig. 2D) clearly showed the presence of resolving venous thrombosis at a month (Fig. 2A).

Fig. 1

CT and CT angiography (CTA) images at the day of initial clinical presentation.

Multifocal hyperdense intracerebral hemorrhages (white arrow) and hypodense area (asterisk) are present in the left frontal lobe. Continuing hyperdensity (black arrow) courses from the hypodense area to the superior sagittal sinus (A). 3-dimensionally reconstructed CTA (B) shows no venous drainage to the superior sagittal sinus (white circle). Thrombosed vein (black arrow) and area of parenchymal staining, suggestive of venous congestion (white arrows) is evident on the axial source (C) and sagittal reformatted (D) images, and medullary and collecting veins in the adjacent brain (black arrowheads) are dilated and prominent (D).

Fig. 2

Follow-up images demonstrating progressive resolution of thrombosis and recanalization of draining vein from the DVA.

DSA at one month shows intravenous filling defects in the left frontal DVA (black arrows), dilated medullary veins, delayed contrast wash-out and parenchymal staining in the lateral projection image (A). CTA at two month reveals patent draining vein (white circle) on three-dimensional reconstruction (B) and axial source image (C) demonstrates corresponding contrast enhancement (black arrow). Note parenchymal staining in the left frontal lobe, evident on the initial CTA (Fig. 1C), is no longer prominent (C). 0n two-year follow-up DSA, medullary veins are not engorged and draining vein is completely recanalized (D).

No underlying cause such as connective tissue disease, coagulopathy, history of steroid administration, dehydration and so on was identified for the spontaneous thrombosis in the venous drainage from DVA.

The patient was treated conservatively, became conscious five days later and eventually recovered without localized neurological deficit. He developed generalized seizure, but had been under control with anti-epileptic medications.

DISCUSSION

In this case, interpretation of CT and CT angiography findings at the time of initial clinical presentation was complicated because spontaneous ICHs abruptly occurred in a young, healthy male and there was no underlying vascular pathology found such as AVM in the left frontal lobe or dural AVM and the hemorrhages appeared not to be related to neoplasms. Hypodense area in the left lobe involved both cortical gray matter and white matter as in the case of cerebral infarction, did not coincide with the territory of left anterior cerebral artery. Curvilinear hyperdensity coursed from the left frontal parenchyma to the midline anteriorly. Source images from CT angiography showed multiple dilated linear enhancements with parenchymal staining in the left frontal lobe. Possible venous infarction due to thrombosis in the venous drainage was suspected but DVA with thrombosis was not included in the initial differential diagnosis because venous collector was not recognizable. Early correct recognition of thrombosed typical DVA as the underlying cause for the ICH and venous infarction of sudden onset could lead to the proper anticoagulation treatment.

Cases of spontaneous ICH related to DVA were reported and associated with either high flow arteriovenous shunts or cavernous venous malformations [1-4]. However, very small number of typical DVAs were reported, which presented ICH as the initial manifestation [7, 8]. Seki et al. [9] analyzed previously reported 13 cases and their one case of typical DVA complicated by thrombosis of the draining vein. Among those 14 cases, they include one case of venous infarction without ICH by mistake, thus four had ICHs. eight cases of venous infarction including their own two were analyzed by Masson et al [10]. A case of childhood DVA complicated by spontaneous thrombosis was reported elsewhere [11] and should be included in the list of venous infarction. Among those nine, two were categorized as "hemorrhagic" and we reviewed the case reports. Authors of the two case reports related ICHs to thrombosis in the draining veins, and their case figures did not show venous infarction initially [8, 12].

Among 21 cases of DVAs with venous thrombosis in the previous literatures, one was reported in French [13] and another one in Spanish [14]. 19 cases reported in English were reviewed [6, 9, 15-18] and we summarized their demographics, location of DVA, presence of parenchymal hemorrhage at the initial diagnosis including our case (Table 1). Among those 20, three had cerebellar DVAs [14, 18, 19], and one case presented with only with subarachnoid hemorrhage and no infarction [18]. Two cases had ICH only [8, 12] and f ive cases [7, 9, 15, 16] showed findings of ICH and venous infarction on the initial brain images. Most of them presented only CT, MRI or angiographic images at the initial diagnosis or at certain time points. Only four cases [7, 10, 12, 20] had follow-up images of any sort, but they did not show sequential changes of the thrombosed vein and DVA, neighboring brain tissue.

Table 1

Case Summary of Thrombosed DVAs Previously Reported in English

As described elsewhere, thrombotic obstruction of DVA and draining vein resulting venous congestion should be the pathologic mechanism for the initial parenchymal hemorrhages and venous infarction. In the present case, sequential CT, CT angiography and digital subtraction angiography demonstrated initial thrombotic obstruction of the venous drainage from DVA, its recanalization and temporal changes occurring in the affected brain parenchyma.

Acknowledgement

Editor allowed to extend the number of references.

Notes

This work was supported by the research grant of the Chungbuk National University in 2010.

References

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Article information Continued

Fig. 1

CT and CT angiography (CTA) images at the day of initial clinical presentation.

Multifocal hyperdense intracerebral hemorrhages (white arrow) and hypodense area (asterisk) are present in the left frontal lobe. Continuing hyperdensity (black arrow) courses from the hypodense area to the superior sagittal sinus (A). 3-dimensionally reconstructed CTA (B) shows no venous drainage to the superior sagittal sinus (white circle). Thrombosed vein (black arrow) and area of parenchymal staining, suggestive of venous congestion (white arrows) is evident on the axial source (C) and sagittal reformatted (D) images, and medullary and collecting veins in the adjacent brain (black arrowheads) are dilated and prominent (D).

Fig. 2

Follow-up images demonstrating progressive resolution of thrombosis and recanalization of draining vein from the DVA.

DSA at one month shows intravenous filling defects in the left frontal DVA (black arrows), dilated medullary veins, delayed contrast wash-out and parenchymal staining in the lateral projection image (A). CTA at two month reveals patent draining vein (white circle) on three-dimensional reconstruction (B) and axial source image (C) demonstrates corresponding contrast enhancement (black arrow). Note parenchymal staining in the left frontal lobe, evident on the initial CTA (Fig. 1C), is no longer prominent (C). 0n two-year follow-up DSA, medullary veins are not engorged and draining vein is completely recanalized (D).

Table 1

Case Summary of Thrombosed DVAs Previously Reported in English

Table 1

*Year of publication of the case report

age in years

M, male; F, female

F, frontal lobe; T, temporal lobe; P, parietal lobe; F-P, fronto-parietal; T-P-O, temporo-parieto-occipital; cbll, cerebellum

§main text in French, with English abstract