Cerebral Venous Sinus Thrombosis After Translabyrinthine Vestibular Schwannoma—A Prospective Study and Suggested Management Paradigm

OBJECTIVEPostoperative cerebral venous sinus thrombosis (CVST) is an uncommon complication of posterior fossa surgery. The true incidence of and optimal management strategy for this entity are largely unknown. Herein, the authors report their institutional incidence and management experience of postoperative CVST after vestibular schwannoma surgery.METHODSThe authors undertook a retrospective review of all vestibular schwannoma cases that had been treated with microsurgical resection at a single institution from December 2011 to September 2017. Patient and tumor characteristics, risk factors, length of stay, surgical approaches, sinus characteristics, CVST management, complications, and follow-up were analyzed.RESULTSA total of 116 patients underwent resection of vestibular schwannoma. The incidence of postoperative CVST was 6.0% (7 patients). All 7 patients developed lateral CVST ipsilateral to the lesion. Four cases occurred after translabyrinthine approaches, 3 occurred after retrosigmoid approaches, and none occurred following middle cranial fossa approaches. Patients were managed with anticoagulation or antiplatelet therapy. Although patients were generally asymptomatic, one patient experienced intraparenchymal hemorrhage, epidural hemorrhage, and obstructive hydrocephalus, likely as a result of the anticoagulation therapy. However, all 7 patients had a modified Rankin scale score of 1 at the last follow-up.CONCLUSIONSPostoperative CVST is an infrequent complication, with an incidence of 6.0% among 116 patients who had undergone vestibular schwannoma surgery at one institution. Moreover, the management of postoperative CVST with anticoagulation therapy poses a serious dilemma to neurosurgeons. Given the paucity of reports in the literature and the low incidence of CVST, additional studies are needed to better understand the cause of thrombus formation and help to establish evidence-based guidelines for CVST management and prevention.

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Venous Strokes

Rivista di Neuroradiologia ◽

10.1177/19714009050180s210 ◽

2005 ◽

Vol 18 (2_suppl) ◽

pp. 61-66 ◽

Cited By ~ 6

Author(s):

U.S. Limaye

Keyword(s):

Phase I ◽

Sinus Thrombosis ◽

Clinical Status ◽

Cerebral Venous Sinus Thrombosis ◽

Venous Sinus ◽

Clinical Group ◽

Clinical Grade ◽

Venous Sinus Thrombosis ◽

Local Thrombolysis ◽

A Prospective Study

Management of Venous strokes with the KEM Protocol. Our experience in management of acute and sub-acute cases of venous strokes with heparin or local thrombolysis with urokinase according to KEM Hospital, INR protocol will be presented. All patients included had angiographically proven cerebral venous sinus thrombosis. Patients were classified according to clinical status scale into mild1–3 and severe clinical grade4–6. The study was divided into three phases. Phase I included 27 patients all treated with systemic heparin. Phase Il included 72 patients, 30 were in severe clinical grade and 52 in mild. 26 were thrombolysed with 14 in severe and 12 in mild clinical grade. A prospective study was carried out in 180 patients according to a defined protocol in Phase 111. 133 of these were in mild clinical grade and 47 in the severe. 67 patients were thrombolysed. In the thrombolysed group 27 patients were in mild & 40 in severe clinical grade. 113 patients were treated with systemic heparin. Adjunctive medical therapy was given as required. Following acute management all were anticoagulated for 6 months. Phase I showed 100% mortality in severe clinical group and 23.53% in mild clinical grade. In Phase II mortality in severe clinical group was 75% in non-thrombolysed group and 57.14% in thrombolysed group. There were no deaths in mild clinical grade patients who were thrombolysed. In Phase 111 in Severe clinical grade, mortality in thrombolysed group was 35% and non-thrombolysed group was 100%. In mild clinical group there was 100% recovery in thrombolysed group and 94.4% in non-thrombolysed group. There was complete clinical recovery in 84.4% of patients in Phase 111. 2 patients had intracranial haemorrhage on Urokinase therapy. The line of treatment of venous strokes with heparin or local thrombolysis can be decided according to the KEM protocol. Patients with Cerebral venous sinus thrombosis had better outcome when managed according to our protocol.

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Postoperative cerebral venous sinus thrombosis in the setting of surgery adjacent to the major dural venous sinuses

Journal of Neurosurgery ◽

10.3171/2018.4.jns18308 ◽

2019 ◽

Vol 131 (4) ◽

pp. 1317-1323 ◽

Cited By ~ 3

Author(s):

Carolina Gesteira Benjamin ◽

Rajeev D. Sen ◽

John G. Golfinos ◽

Chandra Sen ◽

J. Thomas Roland ◽

...

Keyword(s):

Risk Factors ◽

Prospective Study ◽

Sinus Thrombosis ◽

Cerebral Venous Sinus Thrombosis ◽

Venous Sinus ◽

Csf Leak ◽

Tumor Type ◽

Venous Sinus Thrombosis ◽

Venous Sinuses ◽

Dural Venous Sinuses

OBJECTIVECerebral venous sinus thrombosis (CVST) is a known complication of surgeries near the major dural venous sinuses. While the majority of CVSTs are asymptomatic, severe sinus thromboses can have devastating consequences. The objective of this study was to prospectively evaluate the true incidence and risk factors associated with postoperative CVST and comment on management strategies.METHODSA prospective study of 74 patients who underwent a retrosigmoid, translabyrinthine, or suboccipital approach for posterior fossa tumors, or a supratentorial craniotomy for parasagittal/falcine tumors, was performed. All patients underwent pre- and postoperative imaging to evaluate sinus patency. Demographic, clinical, and operative data were collected. Statistical analysis was performed to identify incidence and risk factors.RESULTSTwenty-four (32.4%) of 74 patients had postoperative MR venograms confirming CVST, and all were asymptomatic. No risk factors, including age (p = 0.352), BMI (p = 0.454), sex (p = 0.955), surgical approach (p = 0.909), length of surgery (p = 0.785), fluid balance (p = 0.943), mannitol use (p = 0.136), tumor type (p = 0.46, p = 0.321), or extent of resection (p = 0.253), were statistically correlated with thrombosis. All patients were treated conservatively, with only 1 patient receiving intravenous fluids. There were no instances of venous infarctions, hemorrhages, or neurological deficits. The rate of CSF leakage was significantly higher in the thrombosis group than in the nonthrombosis group (p = 0.01).CONCLUSIONSThis prospective study shows that the radiographic incidence of postoperative CVST is higher than that previously reported in retrospective studies. In the absence of symptoms, these thromboses can be treated conservatively. While no risk factors were identified, there may be an association between postoperative CVST and CSF leak.

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Functional Outcomes and Postoperative Cerebral Venous Sinus Thrombosis after Translabyrinthine Approach for Vestibular Schwannoma Resection: A Radiographic Demonstration of Anatomic Predictors

Journal of Neurological Surgery Part B Skull Base ◽

10.1055/s-0040-1722716 ◽

2021 ◽

Author(s):

Christina Gerges ◽

Patrick Malloy ◽

Nicholas Rabah ◽

Dana Defta ◽

Yifei Duan ◽

...

Keyword(s):

Vestibular Schwannoma ◽

Sinus Thrombosis ◽

Demographic Data ◽

Internal Auditory Canal ◽

Cerebral Venous Sinus Thrombosis ◽

Venous Sinus ◽

Patient Specific ◽

Surgical Approaches ◽

Venous Sinus Thrombosis ◽

Radiographic Measurements

Abstract Introduction While regarded as an effective surgical approach to vestibular schwannoma (VS) resection, the translabyrinthine (TL) approach is not without complications. It has been postulated that postoperative cerebral venous sinus thrombosis (pCVST) may occur as a result of injury and manipulation during surgery. Our objective was to identify radiologic, surgical, and patient-specific risk factors that may be associated with pCVST. Methods The Institutional Review Board (IRB) approval was obtained and the medical records of adult patients with VS who underwent TL craniectomy at University Hospitals Cleveland Medical Center between 2009 and 2019 were reviewed. Demographic data, radiographic measurements, and tumor characteristics were collected. Outcomes assessed included pCVST and the modified Rankin score (mRS). Results Sixty-one patients ultimately met inclusion criteria for the study. Ten patients demonstrated radiographic evidence of thrombus. Patients who developed pCVST demonstrated shorter internal auditory canal (IAC) to sinus distance (mean: 22.5 vs. 25.0 mm, p = 0.044) and significantly smaller petrous angles (mean: 26.3 vs. 32.7 degrees, p = 0.0045). Patients with good mRS scores (<3) appeared also to have higher mean petrous angles (32.5 vs. 26.8, p = 0.016). Koos' grading and tumor size, in our study, were not associated with thrombosis. Conclusion More acute petrous angle and shorter IAC to sinus distance are objective anatomic variables associated with pCVST in TL surgical approaches.

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