Double-Stage Complete Removal of Dumbbell-Shaped Trigeminal Schwannoma: 3-Dimensional Operative Video

2021 ◽  
Author(s):  
Alvaro Campero ◽  
Matías Baldoncini ◽  
Guillermo Román ◽  
Juan F Villalonga
Keyword(s):  
Cerebellopontine Angle ◽  
Complete Removal ◽  
Preoperative Imaging ◽  
Middle Fossa ◽  
3 Dimensional ◽  
Postoperative Mri ◽  
Trigeminal Schwannoma ◽  
Spindle Cell Lesion ◽  
Storiform Pattern ◽  
Two Stages

Abstract Intracranial trigeminal schwannomas are rare tumors.1-4 The aim of this 3-dimensional operative video is to present a double stage complete removal of a dumbbell-shaped trigeminal schwannoma.  This is a 25-yr-old male with headaches, diplopia, and facial pain. The MRI shows a big tumor located at the level of the cerebellopontine angle, petroclival region, and middle fossa. Because of the size of the tumor and its growth within the cerebellopontine angle, we decided to operate the patient in two stages. For the first surgery, the patient was in a semi-sitting position, and a retrosigmoid approach was performed. The second surgery was performed 2 mo after the first operation in a supine position for a pretemporal transzygomatic approach. The pathological study was reported as a schwannoma, and the histological findings were spindle cell lesion with a storiform pattern and histiocytes.  The patient evolved without neurological deficit after the surgeries, and the postoperative MRI shows a complete resection of the tumor.  The patient gave the consent to use the images and surgical video.  Preoperative imaging plays an important role in diagnosis and surgical planning.3-6 For these cases of trigeminal schwannomas with a large extension in the posterior fossa and middle fossa, we believe that the most prudent thing is to perform the surgery in 2 stages.3

Medulla oblongata cavernoma removal through a lazy far lateral approach: operative video and technical nuances

2019 ◽  
Vol 1 (2) ◽  
pp. V21
Author(s):  
Carlos Candanedo ◽  
Samuel Moscovici ◽  
Sergey Spektor
Keyword(s):  
Medulla Oblongata ◽  
Cavernous Malformation ◽  
Complete Removal ◽  
Lateral Approach ◽  
Neurological Deficits ◽  
Total Resection ◽  
Postoperative Mri ◽  
Far Lateral Approach ◽  
Far Lateral ◽  
Brainstem Cavernous Malformation

Removal of brainstem cavernous malformation remains a surgical challenge. We present a case of a 63-year-old female who was diagnosed with a large cavernoma located in the medulla oblongata. The patient suffered three episodes of brainstem bleeding resulting in significant neurological deficits (hemiparesis, dysphagia, and dysarthria). It was decided to remove the cavernoma through a left-sided modified far lateral approach.3The operative video demonstrates the surgical steps and nuances of a complete removal of this complex medulla oblongata cavernous malformation. Total resection was achieved without complications. Postoperative MRI revealed no signs of residual cavernoma with clinical improvement.The video can be found here: https://youtu.be/BTtMvvLMOFM.

An occult ectopic parathyroid adenoma in a pediatric patient: a case report and management algorithm

2017 ◽  
Vol 30 (9) ◽  
Author(s):  
Brent D. Bauman ◽  
Maria Evasovich ◽  
Amanda Louiselle ◽  
Eugene Zheng ◽  
Kevin Goodwin ◽  
...  
Keyword(s):  
Case Report ◽  
Parathyroid Adenoma ◽  
Pediatric Patient ◽  
Pediatric Population ◽  
Preoperative Imaging ◽  
Management Algorithm ◽  
Postoperative Mri ◽  
Complex Patients ◽  
Multiple Imaging ◽  
Parathyroid Adenomas

AbstractBackground:Hyperparathyroidism (HPT) is a rare disease in the pediatric population, and optimal management may be unclear if it is due to an occult parathyroid adenoma. We present a case report of a pediatric patient with an occult, ectopic, supernumerary, parathyroid adenoma.Case presentation:A 13-year-old female who initially presented with anxiety was diagnosed with HPT. Preoperative imaging and bilateral neck exploration with four-gland biopsy were negative for any parathyroid adenoma. Postoperative MRI identified a thymic mass. She subsequently underwent video-assisted thoracoscopic thymectomy with resection of an intrathymic parathyroid adenoma.Conclusions:The diagnosis of pediatric HPT is increasing. Supernumerary or occult parathyroid adenomas are rare and add complexity to presurgical planning and management. Our case represents the rare occurrence of a pediatric ectopic supernumerary occult parathyroid adenoma treated with a two-stage approach utilizing multiple imaging studies. We provide a review of the pathology and propose an algorithmic approach to manage these complex patients.

Combined Transpetrosal Approach With Preservation of Superior Petrosal Vein Drainage for a Cerebellopontine Angle Epidermoid Cyst Extending Into Meckel's Cave: 3-Dimensional Operative Video

2018 ◽  
Vol 16 (6) ◽  
pp. E172-E173
Author(s):  
Ken Matsushima ◽  
Michihiro Kohno ◽  
Nobuyuki Nakajima ◽  
Norio Ichimasu
Keyword(s):  
Epidermoid Cyst ◽  
Cerebellopontine Angle ◽  
Young Patients ◽  
Neurological Deficits ◽  
Meckel’S Cave ◽  
3 Dimensional ◽  
Petrosal Vein ◽  
Meckel's Cave ◽  
Superior Petrosal Sinus ◽  
Superior Petrosal Vein

Abstract The combined transpetrosal approach enables wide exposure around the petroclival region by cutting the tentorium and superior petrosal sinus. We often choose this approach for removal of tumors ventral to the facial and vestibulocochlear nerves, such as petroclival meningioma and epidermoid cyst, because complete removal of the tumor under direct visualization is required to prevent its later recurrence, especially in young patients. Recent reports revealed anatomical variations of the drainage of the superior petrosal sinus, and dural incision considering preservation of the superior petrosal vein was proposed.1-3 This 3-dimensional video shows a patient with an epidermoid cyst, which was surgically treated using the combined transpetrosal approach, with consideration of the variation of the superior petrosal sinus and preservation of the drainage route of the superior petrosal vein. The video was reproduced after informed consent of the patient. The patient is a 31-yr-old woman who presented with a left cerebellopontine angle epidermoid cyst extending into Meckel's cave. The superior petrosal sinus was of the lateral type, draining only laterally into the transverse–sigmoid junction without medial connection with the cavernous sinus.1 The combined transpetrosal approach was performed with cutting of the superior petrosal sinus medial to the entry point of the superior petrosal vein, in order to preserve its drainage into the transverse–sigmoid junction. Meckel’ cave was opened along its lateral margin, and tumor removal was accomplished, leaving only a minute part of the capsule strongly adhering to the neurovascular structures. The patient had no new permanent neurological deficits during follow-up. The figures in the video were modified from Matsushima et al1 by permission of the Congress of Neurological Surgeons.

scholarly journals Resection of a Dumbbell-Shaped Facial Nerve Schwannoma With Preservation of Facial Nerve Function Through the Extended Middle Fossa Approach: 2-Dimensional Operative Video

2021 ◽  
Author(s):  
Kaith K Almefty ◽  
Wenya Linda Bi ◽  
Walid Ibn Essayed ◽  
Ossama Al-Mefty
Keyword(s):  
Facial Nerve ◽  
Cerebellopontine Angle ◽  
Internal Auditory Canal ◽  
Growth Patterns ◽  
Geniculate Ganglion ◽  
Nerve Function ◽  
Middle Fossa ◽  
Facial Nerve Function ◽  
Large Tumor ◽  
Middle Fossa Approach

Abstract Facial nerve schwannomas are rare and can arise from any segment along the course of the facial nerve.1 Their location and growth patterns present as distinct groups that warrant specific surgical management and approaches.2 The management challenge arises when the facial nerve maintains good function (House-Brackmann grade I-II).3 Hence, a prime goal of management is to maintain good facial animation. In large tumors, however, resection with facial nerve function preservation should be sought and is achievable.4,5  While tumors originating from the geniculate ganglion grow extradural on the floor of the middle fossa, they may extend via an isthmus through the internal auditory canal to the cerebellopontine angle forming a dumbbell-shaped tumor. Despite the large size, they may present with good facial nerve function. These tumors may be resected through an extended middle fossa approach with preservation of facial and vestibulocochlear nerve function.  The patient is a 62-yr-old man who presented with mixed sensorineural and conductive hearing loss and normal facial nerve function. Magnetic resonance imaging (MRI) revealed a large tumor involving the middle fossa, internal auditory meatus, and cerebellopontine angle.  The tumor was resected through an extended middle fossa approach with a zygomatic osteotomy and anterior petrosectomy.6 A small residual was left at the geniculate ganglion to preserve facial function. The patient did well with hearing preservation and intact facial nerve function. He consented to the procedure and publication of images.  Image at 1:30 © Ossama Al-Mefty, used with permission. Images at 2:03 reprinted from Kadri and Al-Mefty,6 with permission from JNSPG.

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.

Combined Petrosal Approach for Resection of a Large Trigeminal Schwannoma With Meckel's Cave Involvement—Part I: Anatomic Rationale and Analysis: 2-Dimensional Operative Video

2020 ◽  
Author(s):  
Ali Tayebi Meybodi ◽  
James K Liu
Keyword(s):  
Cerebellopontine Angle ◽  
Skin Incision ◽  
Petrous Apex ◽  
Successful Management ◽  
Meckel’S Cave ◽  
Trigeminal Schwannoma ◽  
Skull Base Approach ◽  
Meckel's Cave ◽  
History Of ◽  
Anterior Petrosectomy

Abstract Resection of large trigeminal schwannomas involving both posterior and middle cranial fossae is challenging. The depth of the surgical target in the superomedial corner of the cerebellopontine angle and the petrous apex makes for a difficult lesion to favorably access, expose, and safely resect. Judicious planning of a skull base approach is therefore the most crucial step in successful management of these formidable tumors. When properly chosen, planned, and executed, the combined petrosal approach sets the stage for an optimal exposure of such tumors that involve both posterior and middle cranial fossae. The present video is the first of a 2-part video presentation that explains the anatomic rationale of selecting a combined petrosal approach (anterior petrosectomy and retrolabyrinthine petrosectomy) for the resection of a large trigeminal schwannoma involving the posterior and middle cranial fossae with an extension into Meckel's cave in a 54-yr-old female presenting with 5-yr history of increasing headaches, left-sided face numbness, and disequilibrium. The benefits, risks, and alternatives of the surgical procedure were discussed in detail with the patient and she consented to proceed with surgery. Part I also discusses the important nuances of positioning the patient, as well as planning and execution of the skin incision, including pericranial flap harvesting.  Of note, the patient consented to the publication of images obtained from her.

scholarly journals Chordoma of the Craniocervical Junction: Endoscopic Endonasal Approach

2019 ◽  
Vol 80 (S 04) ◽  
pp. S372-S374
Author(s):  
Eduard H. Voormolen ◽  
Pierre Olivier Champagne ◽  
Sebastien Froelich
Keyword(s):  
Craniocervical Junction ◽  
University Hospital ◽  
Neurological Deficits ◽  
Preoperative Imaging ◽  
Classical Type ◽  
Endoscopic Endonasal Approach ◽  
Endonasal Approach ◽  
Endoscopic Endonasal ◽  
Postoperative Mri ◽  
Lower Clivus

Objective This study was aimed to achieve gross-total removal of a chordoma of the craniocervical junction via an endonasal approach (Fig. 1). Design The present study is a case report. Setting The study was conducted at neurosurgical clinic of university hospital. Participant A 40-year-old male, with normal neurologic exam and no prior medical history, presented with a 2-year history of cervicalgia. On preoperative imaging, a midline lesion, with image characteristics of chordoma, was seen in the lower clivus and odontoid. It had limited lateral extension. Main Outcome Measures This study measures postoperative neurological deficits and postoperative tumor volume on magnetic resonance imaging (MRI). Results A binostril approach to the upper nasopharynx was performed using endoscope at 30- and 45-degree angles. Subsequently, a heart-shaped mucosal flap was made and the clivus was drilled to expose the lesion (Fig. 2). After initial debulking, the ring of C1 was slightly drilled to reach the tumor in and around the odontoid. Postoperative MRI showed that a gross-total resection was achieved. The patient had no neurologic deficits postoperatively. Pathologic examination revealed a chordoma of the classical type. Conclusion An endoscopic endonasal approach, utilizing the heart-shaped flap and angled endoscopes and instruments, can be considered for resection of select cases of craniocervical junction chordoma with limited lateral expansion.The link to the video can be found at: https://youtu.be/rwVoZJRBIEo.

Preservation of neurological functions during the extended middle fossa approach operation of small cerebellopontine angle tumors

2015 ◽  
Vol 4 (1) ◽  
pp. 1-6
Author(s):  
Andrzej Marchel ◽  
Barbara Jamróz ◽  
Krzysztof Morawski ◽  
Kazimierz Niemczyk ◽  
Antoni Bruzgielewicz ◽  
...  
Keyword(s):  
Cerebellopontine Angle ◽  
Middle Fossa ◽  
Middle Fossa Approach ◽  
Cerebellopontine Angle Tumors

Improving the detection of osteosarcoma tumor margins and metastasis using diagnostic nanoparticles

2009 ◽  
Vol 27 (15_suppl) ◽  
pp. 10512-10512
Author(s):  
A. Dutour ◽  
A. Decouveleare ◽  
V. Josserand ◽  
J. Coll ◽  
F. Chotel ◽  
...  
Keyword(s):  
Near Infrared ◽  
Intraoperative Imaging ◽  
Malignant Lesion ◽  
Surgical Excision ◽  
Complete Removal ◽  
Preoperative Imaging ◽  
Tumor Control ◽  
Fluorescent Nanoparticles ◽  
Metastatic Osteosarcoma ◽  
Imaging Results

10512 Background: The aim of osteosarcoma resection is the complete removal of the primary malignant lesion with adequate margins taking into account tumor control and functional reconstruction. To date, no intraoperative method is available to assist surgeons in precisely delineating tumor extension in the adjacent normal tissues. Thus, preoperative imaging and extended surgical resection remains the gold standard. We developed fluorescent nanoparticles RAFT-cRGD4-ICG’ targeting αVβ3 integrins on tumor neovessels and demonstrated their capacity to reveal tumor and its margins when exposed to near infrared (NIR) light. Methods: We evaluated in an orthotopic metastatic osteosarcoma in rats the potential of RAFT-cRGD4-ICG’ detected intra operatively by NIR illumination to improve margin resection without compromising local tumor control. Controls consisted of pathological margin analysis of the resected tumor/metastasis comparing ICG’ fluorescence with conventional tissue coloration, and pre operative magnetic resonance imaging. Results: We showed a significantly lesser extent of healthy tissue resection after surgical excision when assessing tumor margin intra operatively using RAFT-cRGD4-ICG’ and NIR camera compared to preoperative imaging studies and post operative conventional pathology coloration (p<0.01). Importantly, intraoperative NIR illumination of lungs revealed more metastases than by intraoperative manual lung palpation (p<0.01). Conclusions: Our preclinical data confirm the potential of intraoperative imaging for improved primary tumor and lung metastasis excision. We are now generating clinical-grade RAFT-cRGD4-ICG’ to further evaluate this approach as a mean to improve functional outcome after surgical excision while maintaining tumor control in patients with relapsed/metastatic osteosarcoma. No significant financial relationships to disclose.

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