scholarly journals Endoscopic-assisted resection of vestibular schwannomas in high-riding jugular bulb

2021 ◽  
Vol 5 (2) ◽  
pp. V4
Author(s):  
Florian Roser ◽  
Tanmoy Maiti ◽  
Mohamed Samy Elhammady
Keyword(s):  
Vestibular Schwannoma ◽  
Posterior Margin ◽  
Internal Auditory Canal ◽  
Progression Free Survival ◽  
Jugular Bulb ◽  
Retrosigmoid Approach ◽  
Vestibular Schwannomas ◽  
Sitting Position ◽  
Free Survival ◽  
Dural Opening

The present surgical video demonstrates safe opening of the internal auditory canal (IAC) during vestibular schwannoma surgery via a retrosigmoid approach in the sitting position. Resection of the intrameatal portion of a tumor is important for progression-free survival. Preoperative thin-sliced CT revealed a high-riding jugular bulb obscuring the trajectory. After dural opening, the IAC was approached anteriorly and superiorly. The posterior margin of IAC drilling was above the Tubingen line. Drilling was performed under continuous jugular compression. The vein was pushed down to augment visibility. An angled endoscope was helpful. IAC can be drilled safely in a high-riding jugular bulb with the technique mentioned in the video. The video can be found here: https://stream.cadmore.media/r10.3171/2021.7.FOCVID2198

scholarly journals Management of jugular bulb injury during retrosigmoid transmeatal resection of vestibular schwannoma

2021 ◽  
Vol 5 (2) ◽  
pp. V5
Author(s):  
Felipe Constanzo ◽  
Bernardo Correa de Almeida Teixeira ◽  
Mauricio Coelho Neto ◽  
Ricardo Ramina
Keyword(s):  
Surgical Resection ◽  
Vestibular Schwannoma ◽  
Internal Auditory Canal ◽  
Standard Technique ◽  
Jugular Bulb ◽  
Vestibular Schwannomas ◽  
Link Type

Inadvertent laceration of the jugular bulb is a potentially serious complication of the retrosigmoid transmeatal approach to vestibular schwannomas. Here, the authors present the case of a 51-year-old woman with a right Hannover T4a vestibular schwannoma and bilateral high-riding jugular bulb, which was opened during drilling of the internal auditory canal (IAC). They highlight the immediate management of this complication, technical nuances for closing the defect without occluding the jugular bulb, and modifications of the standard technique needed to continue surgical resection. The video can be found here: https://stream.cadmore.media/r10.3171/2021.7.FOCVID2155

Spreading of the vestibular schwannoma into porus acusticus internus. Endoscopic removal possibilities

2018 ◽  
pp. 40-44
Author(s):  
Orest Palamar ◽  
Andriy Huk ◽  
Dmytro Okonskyi ◽  
Ruslan Aksyonov ◽  
Dmytro Teslenko
Keyword(s):  
Vestibular Schwannoma ◽  
Internal Auditory Canal ◽  
Residual Tumor ◽  
Endoscopic Technique ◽  
Vestibular Schwannomas ◽  
Endoscopic Removal ◽  
Tumor Removal ◽  
Tumor Spread ◽  
Microsurgical Technique ◽  
Tumor Visualization

Aim: To investigate the features of the vestibular schwannoma spread into the internal auditory canal and the possibilities of endoscopic removal. Objectives: To improve tumor visualization in the internal auditory canal; to create a sufficient view angle for tumor removal during endoscopic opening of the internal auditory canal. Materials and methods: The results of surgical treatment of 20 patients with vestibular schwannomas in which the tumor spread to the internal auditory canal were analyzed. Microsurgical tumor removal was performed in 14 cases; Fully endoscopic removal of vestibular schwannomas was performed in 6 cases. The internal auditory canal opening was performed in 14 cases using microsurgical technique and in 6 cases with fully the endoscopic technique. Results: Gross total removal was achieved in 18 cases, subtotal removal in 2 cases. The tumor spread into the internal auditory canal was removed in all cases (100%). Opening the internal auditory canal using the endoscopic technique allows to increase the view angle (up to 20%) and to visualize along the axis of canal. Conclusions: 1) Endoscopic assistance technique allows to improve residual tumor visualization much more better then microsurgical technique; 2) Internal auditory canal opening using endoscopic technique is much more effective than the microsurgical technique (trepanning depth is larger); 3) Endoscopic methods for the internal auditory canal opening allows to increase canal angle view up to 20% (comparing to the microsurgical view).

Headache after Removal of Vestibular Schwannoma Via the Retrosigmoid Approach: A Long-Term Follow-Up-Study

2003 ◽  
Vol 128 (3) ◽  
pp. 387-395 ◽  
Author(s):  
Bernhard Schaller ◽  
Ariane Baumann
Keyword(s):  
Fibrin Glue ◽  
Aseptic Meningitis ◽  
Vestibular Schwannoma ◽  
Internal Auditory Canal ◽  
Retrosigmoid Approach ◽  
Bone Flap ◽  
Posterior Aspect ◽  
Dural Closure ◽  
Postoperative Headache

OBJECTIVE: Our goal was to study the occurrence and source of origin of postcraniotomy headache syndrome after removal of vestibular schwannoma via the retrosigmoid approach. METHODS: A retrospective chart analysis was conducted of all patients with headache at 3 months after removal of vestibular schwannoma from January 1981 through March 1997 and with a minimum of 24 months of follow-up. Diagnosis was made according to the headache classification and was graded using the HARNER scale. Recovery outcome was compared in selected groups of patients with and without headache. A descriptive statistical analysis was used to analyze differences between groups. RESULTS: Of the patients who underwent retrosigmoid craniotomy for removal of vestibular schwannomas, 52 of 155 patients (34%) reported having severe headache of requiring medication every day and/or feeling incapacitated 3 months after surgery. Headache was more prevalent in those who had the bone flap replaced (94% versus 27%), if there was duraplastic or direct dura closure (0% versus 100%). Laboratory-proven aseptic meningitis, most likely due to the use of fibrin glue and drilling of posterior aspect of the internal auditory canal, was mainly associated with postoperative headache (81% versus 2%). In 75% of these cases, calcifications along the brainstem had been noted. CONCLUSION: The origin of postoperative headaches after retrosigmoid vestibular schwannoma resections is not yet fully understood. Different factors may play a role in preventing or reducing headache: dural adhesions to nuchal muscles or to subcutaneous tissues and dural tension in the case of direct dural closure may explain postoperative headache from dural tension. Intradural drilling and the use of fibrin glue may be the source of aseptic meningitis as the etiology of persistent postoperative headache. Prevention of postoperative headache may include the replacement of bone flap at the end of surgery, duraplastic instead of direct dural closure, and prevention of the use of fibrin glue or extensive drilling of the posterior aspect of internal auditory canal.

scholarly journals An aberrant venous channel mimicking the perilabyrinthine cells in the petrous bone of a patient with vestibular schwannoma: illustrative case

2021 ◽  
Vol 2 (18) ◽  
Author(s):  
Masato Ito ◽  
Yoshinori Higuchi ◽  
Kentaro Horiguchi ◽  
Shigeki Nakano ◽  
Shinichi Origuchi ◽  
...  
Keyword(s):  
Vestibular Schwannoma ◽  
Internal Auditory Canal ◽  
Posterior Wall ◽  
Anatomical Variations ◽  
Petrous Bone ◽  
Bone Defects ◽  
Jugular Bulb ◽  
Illustrative Case ◽  
Computed Tomographic ◽  
Major Vein

BACKGROUND Anatomical variations, such as high jugular bulbs and air cell development in the petrosal bone, should be evaluated before surgery. Most bone defects in the internal auditory canal (IAC) posterior wall are observed in the perilabyrinthine cells. An aberrant vascular structure passing through the petrous bone is rare. OBSERVATIONS A 48-year-old man presented with a right ear hearing disturbance. Magnetic resonance imaging revealed a 23-mm contrast-enhancing mass in the right cerebellopontine angle extending into the IAC, consistent with a right vestibular schwannoma. Preoperative bone window computed tomographic scans showed bone defects in the IAC posterior wall, which ran farther posteroinferiorly in the petrous bone, reaching the medial part of the jugular bulb. The tumor was accessed via a lateral suboccipital approach. There was no other major vein in the cerebellomedullary cistern, except for the vein running from the brain stem to the IAC posterior wall. To avoid complications due to venous congestion, the authors did not drill out the IAC posterior wall or remove the tumor in the IAC. LESSONS Several aberrant veins in the petrous bone are primitive head sinus remnants. Although rare, their surgical implication is critical in patients with vestibular schwannomas.

scholarly journals Retrosigmoid Approach for Resection of Medium-Sized Vestibular Schwannoma

2019 ◽  
Vol 80 (S 03) ◽  
pp. S284-S284
Author(s):  
Michael J. Link ◽  
Colin L. W. Driscoll ◽  
Yening Feng ◽  
Maria Peris-Celda ◽  
Christopher S. Graffeo
Keyword(s):  
Vestibular Schwannoma ◽  
Internal Auditory Canal ◽  
Retrosigmoid Approach ◽  
Gross Total Resection ◽  
Instructional Video ◽  
Hearing Level ◽  
Facial Nerve Function ◽  
Total Resection ◽  
Pure Tone Average ◽  
Petrous Temporal Bone

Objectives This video was aimed to describe the relevant anatomy and key surgical steps of retrosigmoid approach for gross total resection of a medium-sized vestibular schwannoma (VS). Design The procedure is described in a surgical instructional video. Setting The surgery took place at a tertiary skull base referral center. Participant Patient is a 63-year-old woman who reported with nonserviceable hearing (Pure Tone Average 60 dB Hearing level, Word Recognition Score 45%), occasional tinnitus, and a VS in the left cerebellopontine angle (CPA), extending into internal auditory canal (IAC), measuring 1.7 cm parallel to the petrous temporal bone. Main Outcome Measures The VS was resected by retrosigmoid approach. Results The surgery results gross total resection of the VS with postoperative House–Brackmann grade 1 facial nerve function and no postoperative complications. Conclusion The retrosigmoid approach is a good strategy to remove VS involving the CPA and the IAC.The link to the video can be found at: https://youtu.be/B6K_UkrKitg.

scholarly journals Retrosigmoid Transmeatal Endoscope-Assisted Approach in Semi-Sitting Position for Resection of Vestibular Schwannoma: 2-D operative Video

2018 ◽  
Vol 79 (S 05) ◽  
pp. S385-S386
Author(s):  
Rocio Evangelista-Zamora ◽  
Stefan Lieber ◽  
Florian Ebner ◽  
Marcos Tatagiba
Keyword(s):  
Vestibular Schwannoma ◽  
Internal Auditory Canal ◽  
Sitting Position ◽  
Speech Discrimination ◽  
Endoscopic Assistance ◽  
Set Up ◽  
One Year ◽  
The Right ◽  
Neurovascular Structures

We present a case of a mid-sized vestibular schwannoma (T3b according to the Hannover classification) that was resected through a retrosigmoid transmeatal approach in semi-sitting position under endoscopic assistance. The patient is a 52-year-old male with acute loss of functional hearing on the right side. Audiometry confirmed a loss of up to 60 dB and lost speech discrimination, there were no associated symptoms such as tinnitus or vertigo. This 2D video demonstrates positioning, OR set-up, anatomical and surgical nuances of the skull base approach and the operative technique for microdissection of the tumor from the critical neurovascular structures, especially the facial and cochlear nerves. A gross total resection was achieved and the patient discharged home after four days with unaltered function of the facial nerve (HB I). At one year follow up there was no indication of residual or recurrence.In summary, the retrosigmoid transmeatal approach is an important and powerful tool in the armamentarium for the microsurgical management of all kinds of vestibular schwannomas. Provided the necessary anesthesiological precautions and intraoperative procedures the semi-sitting position is safe and effective. If needed, the approach can be complemented by the use of an endoscope for visualization of the distal internal auditory canal.The link to the video can be found at: https://youtu.be/pPKT4_5nIn0.

scholarly journals Chances of Improvement in Cases of Vestibular Schwannoma Presenting with Facial Nerve Weakness: Presentation of Two Cases and Literature Review

2018 ◽  
Vol 80 (01) ◽  
pp. 040-045
Author(s):  
Ahmed Rizk ◽  
Marcus Mehlitz ◽  
Martin Bettag
Keyword(s):  
Hearing Loss ◽  
Facial Nerve ◽  
Male Patient ◽  
Vestibular Schwannoma ◽  
Internal Auditory Canal ◽  
Retrosigmoid Approach ◽  
Neurophysiological Monitoring ◽  
Facial Weakness ◽  
First Case ◽  
The Brain

Background and Study Aim Facial nerve (FN) weakness as a presenting feature in vestibular schwannoma (VS) is extremely rare. We are presenting two different cases of VS with significant facial weakness and reviewed the literature for similar cases. Methods and Results We are presenting two cases of VS with significant facial weakness. The first case was a 63-year-old male patient presented with 3 weeks' history of severe left-sided facial weakness (House–Brackmann [HB] grade V) and hearing loss. Magnetic resonance imaging (MRI) of the brain showed a tumor in the left internal auditory canal. Gross total removal with anatomical and physiological FN preservation was performed through a retrosigmoid approach under neurophysiological monitoring. FN function improved postoperatively to HB grade II after 16 months. The other case was 83-year-old male patient presented with sudden left-sided hearing loss and severe facial weakness (HB grade V). MRI of the brain 2.5 years before showed a left-sided (Class-T3A) cystic VS. The tumor was asymptomatic; wait-and-scan strategy was advised by the treating neurologist. Recent MRI of the brain showed approximately three times enlargement of the tumor with brain stem compression, extensive cystic changes, and suspected intratumoral hemorrhage. Surgery was performed; the tumor was subtotally removed through a retrosigmoid approach with intraoperative FN monitoring. The FN was anatomically preserved; however, physiological preservation was not possible. Severe facial weakness with incomplete lid closure persisted postoperatively. Conclusion Surgical treatment could be offered to cases of suspected VS presenting with facial weakness, as these cases may still have a chance for improvement especially in laterally located tumors.

Stereotactic radiosurgery for recurrent vestibular schwannoma after previous resection

2017 ◽  
Vol 126 (5) ◽  
pp. 1506-1513 ◽  
Author(s):  
Marshall J. Huang ◽  
Hideyuki Kano ◽  
Seyed H. Mousavi ◽  
Ajay Niranjan ◽  
Edward A. Monaco ◽  
...  
Keyword(s):  
Tumor Progression ◽  
Stereotactic Radiosurgery ◽  
Vestibular Schwannoma ◽  
Progression Free Survival ◽  
Median Length ◽  
Trigeminal Neuropathy ◽  
Free Survival ◽  
Kaplan Meier ◽  
Facial Function

OBJECTIVEThe goal of this retrospective cohort study was to assess long-term outcomes in patients with vestibular schwannoma (VS) who underwent stereotactic radiosurgery (SRS) after initial microsurgical resection.METHODSFrom the authors' database of 1770 patients with VS, the authors retrospectively analyzed data from 173 Gamma Knife SRS procedures for VS after 1 (128 procedures) or multiple (45 procedures) microsurgical resections. The median length of the interval between the last resection and SRS was 42 months (range 2–329 months). The median length of clinical follow-up was 74 months (range 6–285 months). Progression-free survival after SRS was determined with Kaplan-Meier analysis.RESULTSAt the time of SRS, the hearing of 161 patients (93%) was Gardner-Robertson Class V, and 81 patients (47%) had facial neuropathy (i.e., facial function with House-Brackmann [HB] grades of III–VI), 87 (50%) had trigeminal neuropathy, and 71 (41%) reported imbalance or disequilibrium disorders. The median tumor volume was 2.7 cm3 (range 0.2–21.6 cm3), and the median dose to the tumor margin was 13 Gy (range 11–20 Gy). Radiosurgery controlled growth of 163 (94%) tumors. Progression-free survival after SRS was 97% at 3 years, 95% at 5 years, and 90% at 10 years. Four patients with delayed tumor progression underwent repeat SRS at a median of 35 months (range 23–64 months) after the first SRS. Four patients (2.3%) with tumor progression underwent repeat resection at a median of 25 months (range 19–33 months). Among the patients with any facial dysfunction (indicated by HB grades of II–VI), 19% had improvement in this condition after SRS, and 5.5% with some facial function (indicated by HB grades of I–V) developed more facial weakness. Among patients with trigeminal neuropathy, 20% had improvement in this condition, and 5.8% developed or had worsened trigeminal neuropathy after SRS.CONCLUSIONSStereotactic radiosurgery offered a safe and effective long-term management strategy for VS patients whose tumors remained or recurred after initial microsurgery.

Retrolabyrinthine Meatotomy as Part of Retrosigmoid Approach to Expose the Whole Internal Auditory Canal: Rationale, Technique, and Outcome in Hearing Preservation Surgery for Vestibular Schwannoma

2017 ◽  
Vol 14 (1) ◽  
pp. 36-44 ◽  
Author(s):  
Antonio Mazzoni ◽  
Elisabetta Zanoletti ◽  
Luca Denaro ◽  
Alessandro Martini ◽  
Domenico d’ Avella
Keyword(s):  
Vestibular Schwannoma ◽  
Internal Auditory Canal ◽  
Residual Tumor ◽  
Hearing Preservation ◽  
Retrosigmoid Approach ◽  
Long Term Results ◽  
Consecutive Series ◽  
Unfavorable Condition ◽  
Hearing Preservation Surgery

Abstract BACKGROUND Vestibular schwannoma extending to the fundus of the internal auditory canal is currently considered an unfavorable condition for hearing preservation surgery via a retrosigmoid approach because the lateral end of the canal is hard to view directly during microsurgery. OBJECTIVE To present an improved retrolabyrinthine meatotomy (RLM) technique that enables the full length of the cochlear and facial nerves to be inspected up to their orifices on the fundus. Long-term results are briefly reported. METHODS A consecutive series of 100 cases with various degrees of fundus involvement underwent surgery via a retrosigmoid approach and RLM. The follow-up ranged from 4 to 14 yr. Outcomes on hearing and facial nerve function were recorded, and preoperative MRI findings of the tumor on the fundus were correlated with the surgical findings and the long-term radicality of the tumor resection. RESULTS Residual tumor on the fundus was identified in 3 cases, all belonging to the group with tumors adhering to the fundus. The functional results were in line with the best reported outcomes of this surgery. CONCLUSION RLM via a retrosigmoid approach seemed adequate for the purposes of hearing preservation surgery and enabled the full course of the facial and cochlear nerves through the internal auditory canal to be exposed to direct view. Tumors adhering to the vestibular quadrant of the fundus were more difficult to remove, and there were a few cases of local residual tumor.

Transapical extension in difficult cerebellopontine angle tumours: preliminary report

2003 ◽  
Vol 117 (10) ◽  
pp. 788-792 ◽  
Author(s):  
Mario Sanna ◽  
Manoj Agarwal ◽  
Yogesh Jain ◽  
Alessandra Russo ◽  
Abdel Kader Taibah
Keyword(s):  
Vestibular Schwannoma ◽  
Cerebellopontine Angle ◽  
Cranial Nerves ◽  
Internal Auditory Canal ◽  
Petrous Bone ◽  
Vestibular Schwannomas ◽  
Type I ◽  
Posterior Surface ◽  
Prepontine Cistern ◽  
Anterior Extension

Difficult cerebellopontine angle (CPA) tumours namely large/giant vestibular schwannomas, vestibular schwannomas with a significant anterior extension and meningiomas of the posterior surface of the petrous bone extending anterior to the internal auditory canal (IAC) have always posed a problem for the otoneurosurgeon. Modifications of the enlarged translabyrinthine approach (ETLA) specifically aimed at dealing with these tumours are not reported. The aim of this paper is to introduce the transapical extension of ETLA which involves increased circumferential drilling around the IAC beyond 270°C. The extension allows enhanced surgical control over the tumour as well as the anterior aspect of the CPA including the prepontine cistern, the Vth and VIth cranial nerves. The extension is further classified into Type I and II depending upon the extent of drilling. Type I extension entails drilling around the IAC for 300–320° and is indicated for large/giant vestibular schwannomas (large vestibular schwannoma extrameatal diameter 3–3.9 cm, giant vestibular schwannoma extrameatal diameter [ges ]4 cm) and vestibular schwannomas with significant anterior extension. Type II extension involves complete drilling around the canal for 360° and is indicated for meningiomas of the posterior surface of the petrous bone extending anterior to the IAC.

Sign in / Sign up

Export Citation Format

Share Document