scholarly journals Extra-axial cerebellopontine angle cavernoma: A case report and review of literature

2020 ◽  
Vol 11 ◽  
pp. 386
Author(s):  
Bashar Abuzayed ◽  
Anas Said ◽  
Osama Jamous ◽  
Omar Al-Ashqar ◽  
Hussein Al-Abadi ◽  
...  
Keyword(s):  
Cerebellopontine Angle ◽  
Histopathological Examination ◽  
Cranial Nerves ◽  
Downbeat Nystagmus ◽  
Hemosiderin Deposition ◽  
Intraoperative Management ◽  
Level Of Consciousness ◽  
Axial Mass ◽  
The Right ◽  
Lower Cranial Nerves

Background: Extra-axial cavernomas at the cerebellopontine angle (CPA) are rare clinical entity that can radiologically mimic several lesions encountered at this location. Case Description: A 36-year-old female patient referred to our emergency service with acute decreased level of consciousness and vomiting. Neurological examination showed Glasgow Coma Scale of 12 with downbeat nystagmus of the right eye. Brain computed tomography scan and magnetic resonance imaging showed multilobulated extra-axial mass lesion located in the right CPA. The lesion was with various signal intensities in T1- and T2-weighted images suggestive of hemorrhages of different ages. T2 gradient echo sequences showed multiple sinusoid-like channels and diffuse hemosiderin deposition. These figures were compatible with cavernous malformation. The patient was operated by retrosigmoid approach. Dissection of the mass from the trigeminal, facial, vestibulocochlear, and lower cranial nerves was performed and total resection of the tumor was achieved. Histopathological examination confirmed the diagnosis of cavernoma. Conclusion: Although CPA cavernomas are very rare, they should be considered for differential diagnosis when evaluating CPA lesions preoperatively for better intraoperative management and postoperative outcomes.

scholarly journals Endoscopic Resection of a Cerebellopontine Angle Meningioma via a Retrosigmoid Approach

2019 ◽  
Vol 80 (S 03) ◽  
pp. S310-S310
Author(s):  
Frederick Luke Hitti ◽  
John Y.K. Lee
Keyword(s):  
Cerebellopontine Angle ◽  
Brain Mri ◽  
Cranial Nerves ◽  
Vascular Supply ◽  
Retrosigmoid Approach ◽  
Tumor Capsule ◽  
Imaging Characteristics ◽  
Adjacent Structures ◽  
Patient Reported ◽  
The Right

A variety of lesions may arise within the cerebellopontine angle (CPA). Schwannomas and meningiomas are most commonly found in this location. Imaging characteristics of meningiomas include hyperdensity on head computed tomography (CT) and avid contrast enhancement on T1-weighted postcontrast magnetic resonance imaging (MRI). Here, we present the case of a 49-year-old woman with enlarging right CPA meningioma. The patient reported mild hearing loss on the right but her neurological exam was otherwise benign. Since the lesion was enlarging and symptomatic, the patient was offered resection of the mass for diagnosis and treatment via an endoscopic retrosigmoid approach. We provide a video that illustrates the steps taken to resect this mass endoscopically. After cerebrospinal fluid (CSF) was drained to achieve brain relaxation, the tumor was visualized. The tumor had a rich vascular supply and had the appearance of a typical meningioma. The bipolar was used to cauterize the tumor's vascular supply. The tumor capsule was then opened with the microscissors. The round knife, suction, and ultrasonic tissue debrider were used to debulk the tumor. After internal debulking of the tumor, the capsule was dissected off the cerebellum and mobilized. A combination of blunt and sharp dissection was done to free the tumor capsule from the adjacent structures. Inferiorly, the lower cranial nerves were visualized. Tissue pathology confirmed a diagnosis of grade I meningioma. A gross total resection was achieved and the patient remained neurologically stable, postoperatively. Furthermore, T1-weighted postcontrast brain MRI, 1 year after surgery, showed no residual.The link to the video can be found at: https://youtu.be/X9c_inLp-So.

Continuous electromyography monitoring of motor cranial nerves during cerebellopontine angle surgery

2000 ◽  
Vol 93 (4) ◽  
pp. 586-593 ◽  
Author(s):  
Johann Romstöck ◽  
Christian Strauss ◽  
Rudolf Fahlbusch
Keyword(s):  
Detailed Analysis ◽  
Cranial Nerve ◽  
Cerebellopontine Angle ◽  
Operative Procedure ◽  
Cranial Nerves ◽  
Postoperative Outcome ◽  
Lower Cranial Nerve ◽  
Content Type ◽  
Lower Cranial Nerves ◽  
Fine Print

Object. Electromyography (EMG) monitoring is expected to reduce the incidence of motor cranial nerve deficits in cerebellopontine angle surgery. The aim of this study was to provide a detailed analysis of intraoperative EMG phenomena with respect to their surgical significance.Methods. Using a system that continuously records facial and lower cranial nerve EMG signals during the entire operative procedure, the authors examined 30 patients undergoing surgery on acoustic neuroma (24 patients) or meningioma (six patients). Free-running EMG signals were recorded from muscles targeted by the facial, trigeminal, and lower cranial nerves, and were analyzed off-line with respect to waveform characteristics, frequencies, and amplitudes. Intraoperative measurements were correlated with typical surgical maneuvers and postoperative outcomes.Characteristic EMG discharges were obtained: spikes and bursts were recorded immediately following the direct manipulation of a dissecting instrument near the cranial nerve, but also during periods when the nerve had not yet been exposed. Bursts could be precisely attributed to contact activity. Three distinct types of trains were identified: A, B, and C trains. Whereas B and C trains are irrelevant with respect to postoperative outcome, the A train—a sinusoidal, symmetrical sequence of high-frequency and low-amplitude signals—was observed in 19 patients and could be well correlated with additional postoperative facial nerve paresis (in 18 patients).Conclusions. It could be demonstrated that the occurrence of A trains is a highly reliable predictor for postoperative facial palsy. Although some degree of functional worsening is to be expected postoperatively, there is a good chance of avoiding major deficits by warning the surgeon early. Continuous EMG monitoring is superior to electrical nerve stimulation or acoustic loudspeaker monitoring alone. The detailed analysis of EMG-waveform characteristics is able to provide more accurate warning criteria during surgery.

scholarly journals Extended Anterolateral Infralabyrinthine Transjugular Approach for Microsurgical Resection of Giant Glomus Vagale Tumor: Operative Video and Technical Nuances

2020 ◽  
Author(s):  
James K. Liu ◽  
Kevin Zhao ◽  
Soly Baredes ◽  
Robert W. Jyung
Keyword(s):  
Skull Base ◽  
Cranial Nerves ◽  
Jugular Foramen ◽  
Neck Mass ◽  
Preoperative Embolization ◽  
Rare Type ◽  
Lower Cranial Nerve ◽  
Microsurgical Resection ◽  
The Right ◽  
Lower Cranial Nerves

AbstractGlomus vagale tumor is a paraganglioma of the vagus nerve. It is a rare type of benign tumor that occupies the head and neck and skull base regions. Patients often present with lower cranial nerve dysfunctions such as difficulty swallowing, tongue weakness, and hoarseness. Surgical treatment can be complex and difficult due to its high vascularity, frequent involvement of lower cranial nerves, and surrounding critical vascular structures. In this operative video, we demonstrate an extended anterolateral infralabyrinthine transjugular approach for microsurgical resection of a giant glomus vagale tumor in a 53-year-old male who presented with an enlarging neck mass, difficulty swallowing, right tongue weakness, and hoarseness. Imaging revealed a giant glomus vagale tumor in the right parapharyngeal space extending into the jugular foramen with occlusion of the internal jugular vein. After preoperative embolization, the patient underwent a near-total resection of the tumor with a small microscopic residual at the pars nervosa. In summary, the extended anterolateral infralabyrinthine transjugular approach is a useful strategy for removal of giant glomus vagale tumors extending into the skull base. The surgical technique and nuances are described in a step-by-step fashion in this illustrative operative video.The link to the video can be found at: https://youtu.be/L0EosQK95LE.

Endovascular Treatment of Aneurysms Using Flow-Diversion Embolization: 2-Dimensional Operative Video

2021 ◽  
Author(s):  
Daniel D Cavalcanti ◽  
Peter Kim Nelson ◽  
Eytan Raz ◽  
Maksim Shapiro ◽  
Erez Nossek ◽  
...  
Keyword(s):  
Carotid Artery ◽  
Internal Carotid Artery ◽  
Internal Carotid ◽  
Cranial Nerves ◽  
Giant Aneurysm ◽  
Flow Diverter ◽  
Flow Diversion ◽  
Neck Infection ◽  
The Right ◽  
Lower Cranial Nerves

Abstract Initially developed for large and giant wide-necked aneurysms of the internal carotid artery, flow diverter devices are now used in almost every location safely and with effectiveness.1-5 This video demonstrates a unique case of a giant aneurysm of the right petrous internal carotid artery in a 20-yr-old patient. This is an extremely rare location, and most of patients are asymptomatic.3-6 Signs of compression of the seventh and eight cranial nerves can be present and even Horner syndrome and lower cranial nerves neuropathies. Nevertheless, rupture can lead to epistaxis and otorrhagia, and ultimately to hemorrhagic shock. The patient in the current report was otherwise healthy but presented with lightheadedness and dizziness for 10 d. The patient consented to the procedure. There was no history of major trauma or head and neck infection. A transradial endovascular flow diversion embolization of a giant aneurysm of the petrous internal carotid artery is herein demonstrated in a stepwise manner. A triaxial system was used to deploy 3 overlapping devices. Concepts of J-wire technique, multiple coverage,1 and the so-called weld technique are emphasized. The role of adjunctive coiling and main reasons for failure are also discussed.7,8 Brief cases of flow diversion embolization of aneurysms of different morphologies at different locations are used to highlight the importance of assessing vessel wall apposition and follow-up imaging.

scholarly journals Suboccipital Lateral Approach for Resection of Cerebellopontine Angle Meningioma: Operative Video and Technical Nuances

2018 ◽  
Vol 79 (S 05) ◽  
pp. S397-S398
Author(s):  
Mateus Reghin Neto ◽  
Heros Melo Almeida ◽  
João Almeida ◽  
Ygor Alexim ◽  
Matheus de Almeida ◽  
...  
Keyword(s):  
Treatment Options ◽  
Cranial Nerves ◽  
Lateral Approach ◽  
Magnetic Resonance Imaging Scan ◽  
Extensive Resection ◽  
Tumor Margins ◽  
Postoperative Mri ◽  
History Of ◽  
The Right ◽  
Lower Cranial Nerves

We present the case of a 34-year-old woman, who presented to our department with a 4 months history of dizziness, hearing loss, and tinnitus on the right side. MRI (magnetic resonance imaging) scan demonstrated a large extra-axial lesion, suggestive of a meningioma, with dural attachments to the petrosal bone surface and tentorium, closely related with the trigeminal, abducens, facial, vestibulocochlear, and lower cranial nerves in the right side. Treatment options were discussed with the patient, and surgical resection was selected to remove the lesion, and decompress the cranial nerves and brainstem. The surgery was performed with a patient in a semi-seated position with head placed in a flexed, nonrotated position. A right lateral suboccipital approach was performed, exposing the right transverse and sigmoid sinuses. After dura opening, microsurgical dissection was used to open the cisterna magna, and obtain cerebellum relaxation. That was followed by identification of cranial nerves VII–XII and then identification of the tumor itself. Tumor debulking was then performed with use of suction and ultrasonic aspirator. After extensive resection, the tumor margins were dissected away from brainstem, cerebellum, and cranial nerves. Finally, the tumor attachment to the tentorium was coagulated and cut and the tumor was completely removed. Postoperative MRI confirmed complete resection of the tumor. The patient was discharged on the 1st week after surgery, with no additional postoperative deficits or complications.The link to the video can be found at: https://youtu.be/aZ3jhZTAeAA.

scholarly journals Microsurgical Resection of Cerebellopontine Angle Choroid Plexus Papilloma by Far-Lateral Approach. Case Report

2018 ◽  
Vol 28 (3) ◽  
pp. 193-196
Author(s):  
Lucas Crociati Meguins ◽  
Dionei Freitas De Morais ◽  
Carlos Eduardo Dall’Aglio Rocha ◽  
Ricardo Lourenço Caramanti ◽  
Thayanna Bentes Lemanski Lopes Rodrigues ◽  
...  
Keyword(s):  
Case Report ◽  
Choroid Plexus ◽  
Cerebellopontine Angle ◽  
Cranial Nerves ◽  
Choroid Plexus Papilloma ◽  
Lateral Approach ◽  
Far Lateral Approach ◽  
Far Lateral ◽  
Lower Cranial Nerves ◽  
Plexus Papilloma

Introduction: Choroid plexus tumors (CPTs) are rare papillary neoplasms derived from choroid plexus epithelium. They account for only approximately 0.4%-0.6% of all intracranial tumors, but 10%-20% of brain tumors occurring throughout the first year of life. Objective: The present study describes the case of an adult man presenting a cerebellopontine angle choroid plexus papilloma (CPP) microsurgically treated through suboccipital far-lateral approach. Case report: A 67-years-old-man was admitted presenting progressive headaches and left lower limb weakness. Magnetic resonance images showed a large tumor on the left cerebellopontine angle with heterogeneous contrast enhancement. Total surgical resection was achieved through a right suboccipital far-lateral craniotomy on lateral position with neurophysiological monitoring of lower cranial nerves. No alterations on cranial nerves function was observed during tumor resection. The patient presented an uneventful recovery and was discharged home on the fifth post-operative day. On the six months follow-up, he was asymptomatic. Anatomopathological analysis confirmed the diagnosis of CPP, WHO grade I. Conclusion: Cerebellopontine angle’s cpp is an extremely rare neoplasm that challenges a neurosurgeon ability to deal with tumor in close relation to lower cranial nerves. Appropriate neurosurgical route, surgeons experience and adequate anatomical knowledge of important neural and vascular structures are fundamental to safely remove CPP of the posterior fossa. Suboccipital far-lateral craniotomy gives enough view with minimal retraction to manage the tumor.

scholarly journals The solitary sellar plasmacytoma: a diagnostic challenge

2016 ◽  
Vol 2016 ◽  
Author(s):  
Anne Soejbjerg ◽  
Suzan Dyve ◽  
Steen Baerentzen ◽  
Georg Thorsell ◽  
Per L Poulsen ◽  
...  
Keyword(s):  
Histopathological Examination ◽  
Cranial Nerves ◽  
Pituitary Function ◽  
Mass Lesion ◽  
Temporal Region ◽  
Solitary Plasmacytoma ◽  
List Type ◽  
Diagnostic Challenge ◽  
Pituitary Mass ◽  
The Right

Summary Solitary sellar plasmacytomas are exceedingly rare and difficult to distinguish from other pituitary tumors. We report a case of a 62-year-old woman presenting with blurred vision of the right eye and tenderness of the right temporal region, which was interpreted as temporal arteritis. MRI revealed a pituitary mass lesion (20mm×14mm×17mm) without compression of the optic chiasm and her pituitary function was normal. Pituitary surgery was undertaken due to growth of the lesion, and histopathological examination showed a highly cellular neoplasm composed of mature monoclonal plasma cells. Subsequent examinations revealed no evidence of extrasellar myeloma. The patient received pituitary irradiation and has remained well and free of symptoms apart from iatrogenic central diabetes insipidus. Until now, only eight cases of solitary sellar plasmacytoma have been reported. Most frequent symptoms stem from compression of the cranial nerves in the cavernous sinus (III, IV, V), whereas the anterior pituitary function is mostly intact. Learning points A solitary plasmacytoma is a rare cause of a sellar mass lesion. The radiological and clinical features are nonspecific, but cranial nerve affection and intact pituitary function are usually present. The diagnosis is made histologically and has important therapeutic implications.

Calcified Extra-axial Cavernoma Involving Lower Cranial Nerves: Technical Case Report

2009 ◽  
Vol 64 (suppl_1) ◽  
pp. ONSE135-ONSE136 ◽  
Author(s):  
Alessio Albanese ◽  
Carmelo L. Sturiale ◽  
Quintino G. D’Alessandris ◽  
Gennaro Capone ◽  
Giulio Maira
Keyword(s):  
Histopathological Examination ◽  
Vascular Malformations ◽  
Cranial Nerves ◽  
Neurological Deficits ◽  
Radiological Appearance ◽  
History Of ◽  
Tone Of Voice ◽  
Risk Of Hemorrhage ◽  
Lower Cranial Nerves ◽  
Gait Disturbances

Abstract Objective: Extra-axial cavernomas involving cranial nerves (CNs) are uncommon vascular malformations and may cause neurological deficits. We report what is, to our knowledge, a unique case of a calcified extra-axial cerebellopontine angle (CPA) cavernoma involving the lower CNs. Clinical Presentation: A 48-year-old man was admitted to our department with a 5-month history of gait instability and loss in tone of voice. A clinical examination documented gait disturbances and hoarseness but was otherwise unremarkable. Neuroradiological studies revealed a calcified mass in the lower third of the CPA cistern that was angiographically occult. It was associated with 3 additional lesions with a radiological appearance suggestive of multiple cavernomas. Intervention: The patient underwent a retrosigmoid approach, and the calcified mass, tightly adherent to the lower CNs, was gently removed. The histopathological examination was consistent with a cavernoma. The postoperative course was characterized by a further lowering in the patient's tone of voice. At the 3-month follow-up examination, the patient showed significant improvement. Conclusion: CPA cavernomas are an extremely rare entity. Symptoms are generally related to CN compression, and subarachnoid hemorrhage is a very rare occurrence. The clinical and radiological appearance may mimic that of other CPA tumors (meningiomas, schwannomas). In spite of the benign nature and the very low risk of hemorrhage, we believe, with support from the literature, that surgical treatment is mandatory to prevent significant neurological deficits owing to the chronic CN compression.

scholarly journals Endoscopic Assisted Retrosigmoid Approach for Cerebellopontine Angle Epidermoid Tumor

2018 ◽  
Vol 79 (S 05) ◽  
pp. S413-S414
Author(s):  
Katherine Kunigelis ◽  
Alexander Yang ◽  
A. Youssef
Keyword(s):  
Cerebellopontine Angle ◽  
Antiviral Agents ◽  
Cranial Nerves ◽  
Pineal Region ◽  
Retrosigmoid Approach ◽  
Gross Total Resection ◽  
Total Resection ◽  
Auditory Evoked Responses ◽  
The Right ◽  
Surgical Corridor

This case is a 20-year-old male, who presented with 1 month of right facial weakness (HB4) and complaints of ipsilateral eye dryness. He was initially treated for Bell's palsy with steroids and antiviral agents, but subsequently developed diplopia with right lateral gaze and underwent an MRI (magnetic resonance imaging). MRI demonstrated a 4.5 cm irregular lesion in the right cerebellopontine angle consistent with an epidermoid cyst. Because the tumor had grown with the development of the central nervous system, it has extended into different compartments, including the tentorial incisura and pineal region. A predefined surgical corridor created by the tumor facilitated access to the majority of the tumor through a retrosigmoid approach. Angled endoscopes (30-degree up and down) provided further visualization of tumor away from the line of sight of the microscope, thus allowing for gross total resection of the lesion. This video also demonstrates a sharp dissection technique necessary for safe removal of adherent tumor from critical neurovascular structures, including the basilar artery and several cranial nerves. The ipsilateral auditory evoked responses (ABRs) showed slight improvement from baseline toward the end of the case. A gross total resection was achieved, as shown by the MRI. The patient remained at his baseline cranial nerve (CN) V, VII, and VIII deficits during the immediate postoperative period.The link to the video can be found at: https://youtu.be/vCq5juJh8hk.

Cerebellopontine angle metastasis from clear-cell renal carcinoma presenting as bleeding from the ear

1996 ◽  
Vol 110 (4) ◽  
pp. 370-372 ◽  
Author(s):  
H. S. Bhatoe ◽  
G. U. Deshpande
Keyword(s):  
Cerebellopontine Angle ◽  
Renal Carcinoma ◽  
Clear Cell ◽  
Cranial Nerves ◽  
Metastatic Lesion ◽  
Clear Cell Renal Carcinoma ◽  
Clinical Appearance ◽  
Metastatic Lesions ◽  
Cell Renal Carcinoma ◽  
Lower Cranial Nerves

AbstractMetastatic lesions in the cerebellopontine angle are rare. We encountered one such metastatic lesion from clearcell renal carcinoma that had a striking clinical appearance, bleeding from the ear and multiple lower cranial nerves' involvement. While the overall prognosis in CNS metastasis from systemic malignancy is gloomy, useful palliation can be achieved in patients with solitary lesions.

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