Microsurgical Resection of Trigeminal Schwannomas: 3-Dimensional Operative Video

2019 ◽  
Vol 18 (1) ◽  
pp. E18-E18
Author(s):  
Duarte N C Cândido ◽  
Marcio S Rassi ◽  
Guilherme Henrique Weiler Ceccato ◽  
Jean Gonçalves de Oliveira ◽  
Luis A B Borba
Keyword(s):  
Trigeminal Nerve ◽  
Senior Author ◽  
Petrous Apex ◽  
Middle Fossa ◽  
Middle Fossa Approach ◽  
3 Dimensional ◽  
History Of ◽  
Nerve Paresis ◽  
Microsurgical Resection ◽  
The Right

Abstract Trigeminal schwannomas are benign lesions arising from the Schwann cells of the trigeminal nerve. This is an unusual tumor that accounts for less than 0.4% of intracranial pathologies, even though they are the second most frequent schwannoma after the vestibular schwannoma. The tumor spreads along the natural course of the V nerve at its cisternal portion, along the ganglion inside Meckel's cave or through its peripheral division. Even though the tumor can reach great size and become multicompartmental. We present a 51-yr-old woman, with an history of 3 mo of incapacitating facial pain, that was found on examination to be on the territory of the third division of the trigeminal nerve on the right side. The MRI depicted a large homogeneous enhancing lesion at the base of the right middle fossa with extension through the petrous apex to the most superior and medial part of the posterior fossa. The patient was operated by the senior author, through a middle fossa approach, dissecting between the two layers of the middle fossa dura (the apparent inner and the true outer layer of the cavernous sinus), the so called middle fossa “peeling”. We achieved total resection of the tumor, but the patient presented after surgery with facial nerve paresis. This is thought to be related to geniculate ganglion manipulation, as it was unprotect by bone at the middle fossa and the patient maintained lacrimal function (post-geniculate alteration). It resolved completely after 6 mo. The patient consented to publication of her images.

scholarly journals Presigmoid Approach to Dumbbell Trigeminal Schwannoma

2018 ◽  
Vol 79 (S 05) ◽  
pp. S391-S392
Author(s):  
Katherine Kunigelis ◽  
Daniel Craig ◽  
Alexander Yang ◽  
Samuel Gubbels ◽  
A. Youssef
Keyword(s):  
Trigeminal Nerve ◽  
Treatment Options ◽  
Extent Of Resection ◽  
Direct Access ◽  
Petrous Apex ◽  
Total Resection ◽  
Middle Fossa Approach ◽  
Nerve Preservation ◽  
Presigmoid Approach ◽  
Trigeminal Schwannoma

This case is a 15-year-old male, presenting with headaches, right face, and arm numbness, and ataxia. MRI (magnetic resonance imaging) revealed a large right sided dumbbell shaped lesion, extending into the middle and posterior fossa with compression of the brainstem consistent with a trigeminal schwannoma. Treatment options here would be a retrosigmoid suprameatal approach or a lateral presigmoid approach. Given the tumor extension into multiple compartments, a presigmoid craniotomy, combining a middle fossa approach with anterior petrosectomy, and retrolabyrinthine approach with posterior petrosectomy were used to maximize the direct access corridor for resection. The petrous apex was already expanded and remodeled by the tumor. Nerve fascicles preservation technique is paramount to the functional preservation of the trigeminal nerve. The extent of resection should be weighed against the anatomical functional integrity of the nerve. Near total resection is considered if that means more nerve preservation. Postoperatively, the patient had a slight (House–Brackman grade II) facial droop, which resolved over days and developed right trigeminal hypesthesia at several weeks. This case is presented to demonstrate a combined petrosectomy technique for resection of lesions extending into both the middle and posterior cranial fossa with near total resection and trigeminal nerve preservation.The link to the video can be found at: https://youtu.be/kA9GyFhL1dg.

Extended middle fossa approach to lateralized pontine cavernomas in children

2018 ◽  
Vol 21 (4) ◽  
pp. 384-388 ◽  
Author(s):  
Robert C. Rennert ◽  
Reid Hoshide ◽  
Mark Calayag ◽  
Joanna Kemp ◽  
David D. Gonda ◽  
...  
Keyword(s):  
Trigeminal Nerve ◽  
Internal Auditory Canal ◽  
Csf Leak ◽  
Geniculate Ganglion ◽  
Gasserian Ganglion ◽  
Middle Fossa ◽  
Cavernous Malformations ◽  
Middle Fossa Approach ◽  
Cerebellar Artery ◽  
Mandibular Branch

OBJECTIVETreatment of hemorrhagic cavernous malformations within the lateral pontine region demands meticulous surgical planning and execution to maximize resection while minimizing morbidity. The authors report a single institution’s experience using the extended middle fossa rhomboid approach for the safe resection of hemorrhagic cavernomas involving the lateral pons.METHODSA retrospective chart review was performed to identify and review the surgical outcomes of patients who underwent an extended middle fossa rhomboid approach for the resection of hemorrhagic cavernomas involving the lateral pons during a 10-year period at Rady Children’s Hospital of San Diego. Surgical landmarks for this extradural approach were based on the Fukushima dual-fan model, which defines the rhomboid based on the following anatomical structures: 1) the junction of the greater superficial petrosal nerve (GSPN) and mandibular branch of the trigeminal nerve; 2) the lateral edge of the porus trigeminus; 3) the intersection of the petrous ridge and arcuate eminence; and 4) the intersection of the GSPN, geniculate ganglion, and arcuate eminence. The boundaries of maximal bony removal for this approach are the clivus inferiorly below the inferior petrosal sinus; unroofing of the internal auditory canal posteriorly; skeletonizing the geniculate ganglion, GSPN, and internal carotid artery laterally; and drilling under the Gasserian ganglion anteriorly. This extradural petrosectomy allowed for an approach to all lesions from an area posterolateral to the basilar artery near its junction with cranial nerve (CN) VI, superior to the anterior inferior cerebellar artery and lateral to the origin of CN V. Retraction of the mandibular branch of the trigeminal nerve during this approach allowed avoidance of the region involving CN IV and the superior cerebellar artery.RESULTSEight pediatric patients (4 girls and 4 boys, mean age of 13.2 ± 4.6 years) with hemorrhagic cavernomas involving the lateral pons and extension to the pial surface were treated using the surgical approach described above. Seven cavernomas were completely resected. In the eighth patient, a second peripheral lesion was not resected with the primary lesion. One patient had a transient CN VI palsy, and 2 patients had transient trigeminal hypesthesia/dysesthesia. One patient experienced a CSF leak that was successfully treated by oversewing the wound.CONCLUSIONSThe extended middle fossa approach can be used for resection of lateral pontine hemorrhagic cavernomas with minimal morbidity in the pediatric population.

scholarly journals Anterior Petrosal Approach for the Resection of a Petrous Apex Meningioma with Tentorial Infiltration

2019 ◽  
Vol 80 (S 03) ◽  
pp. S304-S304
Author(s):  
Diego Mendez-Rosito
Keyword(s):  
Trigeminal Neuralgia ◽  
Free Edge ◽  
Gross Total Resection ◽  
Petrous Apex ◽  
Anatomical Landmarks ◽  
Middle Fossa ◽  
Total Resection ◽  
Middle Fossa Approach ◽  
Anterior Petrosectomy ◽  
Surgical Corridor

Objective The anterior petrosal approach is an extension of the middle fossa approach, characterized by drilling of the posteromedial triangle of the middle fossa. Drilling the Kawase's rhomboid creates a surgical corridor to the posterior fossa after splitting the tentorium. We present a case of a petrous apex meningioma invading the tentorium and causing trigeminal neuralgia. Results The patient was positioned in a Mayfield with the head rotated. A frontotemporal incision was done. A basal craniotomy was done to allow epidural dissection. The anatomical landmarks were identified. The surgical video is analyzed together with cadaveric dissections to highlight landmarks when doing an anterior petrosectomy. The tentorium was identified and the infiltrated region was coagulated and removed. The tentorium was sharply sectioned until the free edge of the tentorium was opened. The tumor in the petrous apex was identified and removed. The trigeminal nerve was decompressed and a gross total resection was achieved with resolution of the symptoms. Conclusion The anterior petrosal approach is a useful corridor to remove tumors in the petrous apex that infiltrate the tentorium. A thorough knowledge of the anatomical landmarks is crucial to identify and delineate the limits of the Kawase's rhomboid. After evaluating different surgical corridors, the anterior petrosal approach allows a gross total resection including the removal of the infiltrated tentorium and a resolution of the symptoms.The link to the video can be found at: https://youtu.be/p4KPUnM_bww.

Intraspinosum Middle Meningeal Artery Ligation: A Simple Technique to Control Bleeding in the Middle Fossa During the Anterior Transpetrosal Approach

2017 ◽  
Vol 13 (2) ◽  
pp. 163-172
Author(s):  
Shunsuke Shibao ◽  
Hamid Borghei-Razavi ◽  
Kazunari Yoshida
Keyword(s):  
Facial Nerve ◽  
Histological Study ◽  
Middle Meningeal Artery ◽  
Mandibular Nerve ◽  
Petrous Apex ◽  
Middle Fossa ◽  
Foramen Ovale ◽  
Anterior Transpetrosal Approach ◽  
Nerve Paresis ◽  
Meningeal Artery

Abstract BACKGROUND: Although the greater superficial petrosal nerve (GSPN) is an important landmark of the anterior transpetrosal approach (ATPA), bleeding from the interdural space around the foramen spinosum (FS), the GSPN, and the foramen ovale impedes the identification of the GSPN, during epidural dissection in the ATPA. OBJECTIVE: To describe the technique of intraspinosum middle meningeal artery (MMA) ligation, which enables us to control bleeding from the interdural space. METHODS: During epidural dissection, we identified the FS and partially drilled the lateral side of the FS. Next, we cut the convergence site of the neurovascular structures such as the MMA, middle meningeal vein, and the meningeal branch of the mandibular nerve with the periosteal dura within the FS and continued dural detachment epidurally to expose the petrous apex. Bleeding control around the FS and postoperative facial nerve paresis were assessed for 96 patients treated with the ATPA. Additionally, histological study was performed around the FS using Masson's trichrome stain. RESULTS: In all cases, in which this technique was used, bleeding from the interdural space was well controlled and no persistent facial nerve paresis was identified. In the histological study, we confirmed that the MMA, the middle meningeal vein, and the meningeal branch of the mandibular nerve converged into the FS and many venous channels existed in the interdural space around the FS and the foramen ovale. CONCLUSION: Intra-FS MMA ligation is an effective method for control of bleeding from the interdural space of the middle fossa during the ATPA.

scholarly journals The Middle Fossa Approach for the Removal of a Trochlear Schwannoma

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Andrew B. Boucher ◽  
L. Madison Michael
Keyword(s):  
Nerve Palsy ◽  
Brain Magnetic Resonance Imaging ◽  
Complete Removal ◽  
Pathological Examination ◽  
Trochlear Nerve ◽  
Middle Fossa Approach ◽  
Anterior Transpetrosal Approach ◽  
History Of ◽  
The Right ◽  
Fourth Nerve Palsy

Objectives. Schwannomas originating from the trochlear nerve are extremely rare; only 30 cases have been reported in the literature. Many operative approaches have been utilized for lesion resection, but the advantages of the anterior transpetrosal approach are numerous and include excellent exposure, minimal extradural retraction of the temporal lobe, and minimal cerebrospinal fluid leaks. We report the second case of a trochlear schwannoma resected via the anterior transpetrosal approach.Setting. A 64-year-old male presented with 3-month history of diplopia and headaches. On physical examination, he was found to have a right fourth nerve palsy. Brain magnetic resonance imaging revealed a mass within the right ambient cistern compressing the adjacent midbrain. A right-sided anterior transpetrosal approach was used—which confirmed that the trochlear nerve entered the mass—to achieve gross total resection. Pathological examination confirmed diagnosis of schwannoma. The patient was discharged on postoperative day 3. He experienced a persistent fourth nerve palsy postoperatively with an otherwise normal neurological examination. Follow-up imaging confirmed complete removal of the tumor.Conclusion. The anterior transpetrosal approach is an excellent approach for removal of trochlear schwannomas involving the cisternal course of the trochlear nerve. It affords complete visualization of this anatomical region while introducing minimal morbidity.

Radiographic Anatomy of the Petrous Apex: A Study Related to the Middle Fossa Approach

2004 ◽  
Vol 131 (2) ◽  
pp. P249-P250 ◽  
Author(s):  
Aaron Gabriel Benson ◽  
Hamid R Djalilian
Keyword(s):  
Petrous Apex ◽  
Middle Fossa ◽  
Middle Fossa Approach

scholarly journals Third nerve paralysis due to cranial metastasis of prostate tumor

2016 ◽  
Vol 12 (1) ◽  
Author(s):  
Rao Muhammad Rashad Qamar ◽  
Qasim Mansoor ◽  
Majeed T
Keyword(s):  
Previous History ◽  
Anterior Segment ◽  
Petrous Apex ◽  
Nerve Paralysis ◽  
History Of ◽  
Total Body ◽  
The Right ◽  
Cranial Metastasis ◽  
Oncology Unit ◽  
Third Nerve

A 90 years old man presented with outward deviated right eye with droopy lid. These symptoms were developed over a period of two weeks and there was no pain behind the eye. There was no previous history of Diabetes mellitus, hypertension etc. He had a treatment for adenocarcinoma of prostate six years ago. On examination his best-corrected visual acuity was 6/60 in each eye. There was right complete third nerve paralysis with pupil involvement. Anterior segment examination showed nucleosclerotic changes on both sides. Posterior segment examination showed ARMD (dry type) in both eyes. Intraocular pressure and discs were normal. Contrast enhanced MR scan brain revealed a destructive mass at the base of skull at petrous apex on the right side extending forward to orbital apex on the same side. Total body bone scan also showed multiple metastatic lesions. Patient was referred to oncology unit for further management

scholarly journals Polylactic Acid Implant for Cranioplasty with 3-dimensional Printing Customization: A Case Report

2020 ◽  
Vol 8 (C) ◽  
pp. 151-155
Author(s):  
Tedy Apriawan ◽  
Khrisna Rangga Permana ◽  
Ditto Darlan ◽  
Muhammad Reza Arifianto ◽  
Fitra Fitra ◽  
...  
Keyword(s):  
Case Report ◽  
3D Printing ◽  
Polylactic Acid ◽  
Cost Effective ◽  
Skull Defect ◽  
3 Dimensional ◽  
First Case ◽  
Good Cosmetic ◽  
History Of ◽  
The Right

BACKGROUND: Cranioplasty is aimed to restore the structure and function of the lost portion of the skull defect. Many materials can be used for cranioplasty, such as the bones of the patient (autograft), the bones of other patients (allograft), bones of animals (xenograft), or synthetic materials such as acrylic or titanium mesh. These materials are quite expensive and sometimes require complex processes. Manual shaping of material for cranioplasty is also quite time-consuming and prone to cause esthetic dissatisfaction. The author will discuss the case of using polylactic acid (PLA) implant with 3-dimensional (3D) printing customization as a cheap and accurate cosmetic solution for cranioplasty procedures. CASE REPORT: We report 2 cases of skull defect underwent cranioplasty. The first case, female, 20-year-old, had a history of severe traumatic brain injury (TBI) and epidural hematoma. She underwent decompression craniotomy on the left frontotemporoparietal region of her skull. The second case, male, 46-year-old, had a history of spontaneous intracerebral hemorrhage due to arteriovenous malformation (AVM). He underwent decompression craniotomy on the right frontotemporoparietal region of her skull. Both the data of computerized tomography (CT) scan were reconstructed to get 3D model of skull defect. Prosthesis was made by 3D printer accordingly using PLA as material. There was no complication reported postoperatively and cosmetic satisfaction was obtained on both cases. CONCLUSION: The use of PLA implant with 3D printing customization was proved to be cost-effective and good cosmetic satisfaction with no complication reported following cranioplasty procedure.

Combined transmastoid middle fossa approach for giant cholesterol granuloma of the petrous apex: technique for “dual exhaust” drainage

2014 ◽  
Vol 36 (v1supplement) ◽  
pp. 1
Author(s):  
James K. Liu ◽  
Robert W. Jyung
Keyword(s):  
Hearing Loss ◽  
Facial Nerve ◽  
Cyst Wall ◽  
Petrous Apex ◽  
Cholesterol Granuloma ◽  
Middle Fossa ◽  
Catheter Drainage ◽  
Middle Fossa Approach ◽  
Air Cells ◽  
Cyst Cavity

Cholesterol granulomas are cystic lesions that typically arise in the petrous apex as a result of an inflammatory giant-cell reaction to cholesterol crystal deposits that are formed when normal aeration and drainage of temporal bone air cells become occluded resulting in transudation of blood into the petrous air cells. Surgical strategies include simple cyst decompression, radical excision of the cyst wall, or fenestration and drainage with silastic tubing. The authors present a giant cholesterol granuloma compressing the cerebellopontine angle and brainstem in a 35 year-old male who presented with progressive facial nerve weakness, sensorineural hearing loss, and vertigo. A combined transmastoid middle fossa extradural approach was performed to remove the cyst contents and decompress the brain-stem. A near total excision of the cyst wall was achieved with a small remnant adherent to the posterior fossa dura. Two separate silastic catheters were placed into the cyst cavity to provide “dual exhaust” drainage. One catheter drained the cyst cavity into the sphenoid sinus via a window made in the anteromedial triangle between V1 and V2. The second catheter drained the cyst cavity into the mastoidectomy cavity and middle ear. Postoperative MRI demonstrated regression of the cyst and excellent decompression of the brainstem. The patient experienced return of normal facial nerve function while hearing loss remained unchanged. He remained free of recurrence at 4 years postoperatively. The theoretical advantages of cyst wall removal combined with dual catheter drainage are longer term patency of cyst drainage and decrease of cyst recurrence. In this operative video atlas report, we describe the step-by-step technique and illustrate the operative nuances and surgical pearls to safely and efficiently perform the “dual exhaust” catheter drainage and resection of a giant cholesterol granuloma via a combined transmastoid middle fossa approach.The video can be found here: http://youtu.be/iZpYBP26ghA.

Extirpation of Recurrent Petrous Apex Cholesterol Granuloma Through the Zygomatic Approach: 2-Dimensional Operative Video

2021 ◽  
Author(s):  
Mark Eisenberg ◽  
Walid Ibn Essayed ◽  
Ossama Al-Mefty
Keyword(s):  
Short Distance ◽  
Petrous Apex ◽  
Cholesterol Granuloma ◽  
Middle Fossa ◽  
Resonance Imaging ◽  
Endoscopic Endonasal ◽  
Middle Fossa Approach ◽  
Weighted Magnetic Resonance Imaging ◽  
Year 2000 ◽  
Air Cells

Abstract Petrous apex cholesterol granulomas are believed to result from blockage of the normal aeration of the petrous air cells, resulting in a repetitive cycle of mucosal engorgement, hemorrhage, and granuloma formation.1 The lesion usually progressively expands causing compressive symptoms. The thick granulomatous wall envelopes various ages of breakdown products, including a cholesterol-containing fluid, which is typically hyperintense on T1 and T2 weighted magnetic resonance imaging. Drainage procedures, regardless of the route (endoscopic, endonasal, or transtemporal), with or without stenting or marsupialization, will only temporarily drain this cholesterol-containing fluid, with consequently frequent recurrences.2-5 A total exoneration of the granuloma and obliteration of the cavity with vascularized tissue will assure a more durable outcome.1 The extradural zygomatic/middle fossa approach provides a short distance to the petrous apex and is purely extradural. By sectioning the zygoma, temporal lobe retraction is avoided.6 We present a case of a 29-yr-old male who presented in the year 2000 with progression of a left petrous apex cholesterol granuloma despite 2 previous drainage and stenting procedures.  The patient consented for surgery and photo publication. Images in video at 2:41 © JNSPG, republished from Eisenberg et al1 with permission.

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