scholarly journals An Overview of Definition and Approaches to Petroclival Meningioma

2021 ◽  
pp. 1-2
Author(s):  
Alireza Khoshnevisan ◽  
Alireza Khoshnevisan
Keyword(s):  
Ct Scan ◽  
Temporal Bone ◽  
Posterior Fossa ◽  
Trigeminal Nerve ◽  
Petrous Bone ◽  
Tumor Location ◽  
Intracranial Tumors ◽  
Petroclival Meningioma ◽  
Brain Ct Scan ◽  
Petrous Temporal Bone

Meningiomas account for 20 to 25% of all intracranial tumors and 10% are seen in the posterior fossa. Petroclival tumors are defined as arising from the upper two thirds of the clivus, medial to the trigeminal nerve at the petroclival junction. Brain CT scan and MRI are routinely used to evaluate tumor anatomy. The petrous temporal bone is a hindrance to resection of these tumors. Oftentimes neurosurgeons are unskilled with the anatomy of the petrous bone, and so suboccipital and pterional routes are usually preferred. Some authors have encouraged using traditional neurosurgical approaches to these tumors. In this manuscript we review tumor location and approaches used for resection of these challenging tumors.

scholarly journals Transpetrosal approaches to the posterior fossa

2005 ◽  
Vol 19 (2) ◽  
pp. 1-9 ◽  
Author(s):  
Ramachandra P. Tummala ◽  
Ernesto Coscarella ◽  
Jacques J. Morcos
Keyword(s):  
Temporal Bone ◽  
Posterior Fossa ◽  
Cerebellopontine Angle ◽  
Petrous Bone ◽  
Middle Fossa ◽  
Petroclival Region ◽  
Middle Fossa Approach ◽  
Petrous Temporal Bone ◽  
Anterior Group ◽  
Different Levels

Resection of the petrous temporal bone to various degrees provides different levels of access to lesions of the posterior fossa. Although their nomenclature can be confusing, the numerous variants of the transpetrosal approaches can be classified broadly into anterior and posterior groups. The posterior transpetrosal approaches include the retro-labyrinthine, translabyrinthine, and transcochlear, whereas the ones in the anterior group are extensions of the basic middle fossa approach. Both the anterior and posterior approaches have the potential of exposing the cerebellopontine angle and the petroclival region. The posterior approaches are based on the standard mastoidectomy and involve resection of the petrous bone to various degrees. This results in progressively increased exposure anteriorly, but comes at the expense of hearing in the translabyrinthine approach and of hearing and facial strength in the transcochlear approach. In contrast, the middle fossa approaches spare the lateral petrous bone and involve resection of the medial petrous bone to various degrees. All of the middle fossa approaches are designed to preserve hearing. Extensions of the middle fossa approaches involve resection of bone within the Kawase rhomboid and division of the tentorium to provide exposure of the posterior fossa.

High Jugular Bulb: Implications for Posterior Fossa Neurotologic and Cranial Base Surgery

1993 ◽  
Vol 102 (2) ◽  
pp. 100-107 ◽  
Author(s):  
Steven D. Rauch ◽  
Wen-Zhuang Xv ◽  
Joseph B. Nadol
Keyword(s):  
Temporal Bone ◽  
Posterior Fossa ◽  
Cerebellopontine Angle ◽  
Internal Auditory Canal ◽  
Petrous Bone ◽  
Jugular Bulb ◽  
Variable Position ◽  
High Jugular Bulb ◽  
Cranial Base Surgery ◽  
Bone Exposure

The suboccipital-retrosigmoid approach to the internal auditory canal and cerebellopontine angle is being used with increasing frequency for neurotologic surgery, including vestibular nerve section and resection of acoustic neuroma. It offers wide exposure of the cerebellopontine angle and the cranial nerve VII—VIII complex as it courses from the brain stem to the temporal bone. Exposure of the internal auditory canal can be achieved by removing its posterior bony wall. Safe utilization of this approach requires familiarity with the variable position of structures within the petrous bone, including the lateral venous sinus and jugular bulb. We report here a case in which bleeding resulted from injury to a high jugular bulb during surgical exposure of the internal auditory canal via the suboccipital route and discuss the regional anatomy of the jugular bulb based on study of 378 consecutive temporal bone specimens from the collection of the Massachusetts Eye and Ear Infirmary. High jugular bulb was defined as encroachment of the dome of the bulb within 2 mm of the floor of the internal auditory canal. Forty-six percent of scoreable specimens met this criterion. However, when donors less than 6 years of age were excluded, a high jugular bulb was identified in 63% of specimens. Relevance to neurotologic surgery of the posterior fossa is presented.

Unusual Case of Posterior Fossa Extradural Hematoma in a Child: Review of the Literature

2020 ◽  
pp. 1-5
Author(s):  
Gerardo Caruso ◽  
Patrizia Fiore ◽  
Maria Luisa Gorgoglione ◽  
Giuseppe Ricciardo ◽  
Maria Caffo
Keyword(s):  
Ct Scan ◽  
Posterior Fossa ◽  
Neurological Status ◽  
Rapid Decline ◽  
Extradural Hematoma ◽  
Mortality And Morbidity ◽  
Risk Of Mortality ◽  
History Record ◽  
Neurological Presentation ◽  
Brain Ct Scan

<b><i>Introduction:</i></b> Posterior fossa extradural hematoma (PFEH) is a rare pathology often due to nuchal region trauma. In children, PFEH causes rapid decline of the neurological status also for brain stem compression. Early brain computed tomography (CT) scan is necessary suspicious for PFEH. Most patients need surgical evacuation. <b><i>Case Presentation:</i></b> In this article, we present a 5-year-old patient arrived for meningitis that came out in favor of PFEH after an accurate history record. <b><i>Discussion/Conclusion:</i></b> Accurate anamnestic records, especially in pediatric patients, prevent from misleading clinic and neurological presentation. Brain CT scan is an indispensable diagnostic tool in order to promptly recognize and treat PFEH considering that rapid cognitive impairment of patients raises the risk of mortality and morbidity.

A comparison of high resolution CT scan of temporal bone and operative findings in middle ear cholesteatoma

1993 ◽  
Vol 29 (5) ◽  
pp. 896
Author(s):  
Tae Beom Kweon ◽  
Hun Seong ◽  
Mal Soon Cheon ◽  
Hack Jin Kim ◽  
Keung Jae Jang ◽  
...  
Keyword(s):  
High Resolution ◽  
Ct Scan ◽  
Temporal Bone ◽  
Middle Ear ◽  
High Resolution Ct ◽  
Middle Ear Cholesteatoma ◽  
Operative Findings

scholarly journals The utility of brain CT scan modality in the management of dizziness at the emergency department: A retrospective single-center study

2021 ◽  
pp. 102220
Author(s):  
Khaled Z. Alawneh ◽  
Liqaa A. Raffee ◽  
Ahmad A. Oqlat ◽  
Ammar A. Oglat ◽  
Majdi Al Qawasmeh ◽  
...  
Keyword(s):  
Emergency Department ◽  
Ct Scan ◽  
Single Center ◽  
Brain Ct ◽  
Single Center Study ◽  
Brain Ct Scan ◽  
Center Study

Irresectable tumours of the temporal bone

1987 ◽  
Vol 101 (5) ◽  
pp. 432-442 ◽  
Author(s):  
R. E. Quiney ◽  
L. M. Flood
Keyword(s):  
Temporal Bone ◽  
Case Reports ◽  
Sporadic Case ◽  
Petrous Apex ◽  
Surgical Approaches ◽  
Total Removal ◽  
Inaccessible Area ◽  
History Of ◽  
Petrous Temporal Bone

AbstractSporadic case reports and the few published series of expanding lesions of the deep petrous temporal bone propose a variety of surgical approaches to ensure excision. All such surgery represents a compromise between exposure adequate for total removal and avoidance of further neurological deficit. Unfortunately pathology in the petrous apex evolves relatively silently and diagnosis is delayed. In many cases total excision is impossible. We present a series of patients presenting with advanced tumours of the deep petrous temporal bone in order to illustrate the spectrum of disease encountered, the limited role of surgery and the natural history of irresectable pathology in this remote and inaccessible area.

scholarly journals Profound hearing loss following surgery in pediatric patients with posterior fossa low-grade glioma

2017 ◽  
Vol 5 (2) ◽  
pp. 96-103 ◽  
Author(s):  
Yahya Ghazwani ◽  
Ibrahim Qaddoumi ◽  
Johnnie K Bass ◽  
Shengjie Wu ◽  
Jason Chiang ◽  
...  
Keyword(s):  
Hearing Loss ◽  
Posterior Fossa ◽  
Extent Of Resection ◽  
Tumor Location ◽  
Low Grade Glioma ◽  
Gross Total Resection ◽  
Subtotal Resection ◽  
Low Grade ◽  
Total Resection ◽  
Profound Hearing Loss

Abstract Background Hearing loss may occur in patients with posterior fossa low-grade glioma who undergo surgery. Methods We retrospectively reviewed 217 patients with posterior fossa low-grade glioma, including 115 for whom results of hearing tests performed after surgery and before chemotherapy or radiation therapy were available. We explored the association of UHL with age at diagnosis, sex, race, tumor location, extent of resection, posterior fossa syndrome, ventriculoperitoneal shunt placement, and histology. Results Of the 115 patients, 15 (13.0%: 11 male, 6 black, 8 white, 1 multiracial; median age 7 years [range, 1.3–17.2 years]) had profound UHL after surgery alone or before receiving ototoxic therapy. Median age at tumor diagnosis was 6.8 years (range, 0.7–14.1 years), and median age at surgery was 6.8 years (range, 0.7–14.1 years). Patients with UHL had pathology characteristic of pilocytic astrocytoma (n = 10), ganglioglioma (n = 4), or low-grade astrocytoma (n = 1). Of these 15 patients, 4 underwent biopsy, 1 underwent gross total resection, 1 underwent near-total resection, and 9 underwent subtotal resection. UHL was more frequent in black patients than in white patients (OR 7.3, P = .007) and less frequent in patients who underwent gross total resection or near-total resection than in those who underwent subtotal resection (OR 0.11, P = .02). Conclusions Children undergoing surgery for posterior fossa low-grade glioma are at risk for UHL, which may be related to race or extent of resection. These patients should receive postoperative audiologic testing, as earlier intervention may improve outcomes.

scholarly journals KORELASI KADAR LAJU ENDAP DARAH DENGAN NILAI ASPECTS PADA PASIEN STROKE ISKEMIK

2015 ◽  
Vol 38 (1) ◽  
pp. 26
Author(s):  
Ratih Ismiranti Murni ◽  
Dwi Pudjonarko ◽  
Bambang Satoto ◽  
Sukma Imawati
Keyword(s):  
Diabetes Mellitus ◽  
Ischemic Stroke ◽  
Ct Scan ◽  
Acute Ischemic Stroke ◽  
Clinical Manifestations ◽  
Stroke Patients ◽  
Cross Sectional ◽  
Emergency Imaging ◽  
Brain Ct Scan ◽  
Relationship Of

AbstrakStroke adalah penyebab utama ke-3 kematian di Amerika Serikat. Stroke iskemik adalah kondisi kompleks dengan etiologi dan manifestasi klinis bervariasi. CT Scan kepala adalah pencitraan darurat stroke membedakan dengan perdarahan intrakranial. Beberapa peneliti mengemukakan adanya korelasi independent dan hubungan pemeriksaan rutin biomarkers pada pasien stroke iskemik akut termasuk di dalamnya parameter inflamasi yang berperan pada patofisiologi iskemia otak. Tujuan penelitian ini mengetahui korelasi kadar LED dengan penilaian ASPECTS pada pasien stroke iskemik. Penelitian ini merupakan penelitian observasional analitik belah lintang dari catatan rekam medik. Selama periode Desember 2012 - Oktober 2014. Didapatkan 16 sampel yang memenuhi kriteria inklusi dan ekslusi. Dengan beberapa karakteristik subyek penelitian meliputi usia, jenis kelamin, hipertensi, diabetes mellitus, dislipidemia, kadar LED 1 dan 2, awitan stroke iskemik akut. Uji statistik Rank Spearman’s,dan uji bivariat maupun multivariat. Didapatkan hasil tidak ada korelasi antara nilai ASPECTS dengan kadar LED dan faktor yang mempengaruhi nilai ASPECTS.AbstractStroke is the third major cause of death in United States. Ischemic stroke results from complex conditions with various etiologies and clinical manifestations. Brain CT Scan is a stroke emergency imaging to differentiate intracranial hemorrhage. Several studies claimed there were independent correlation and relationship of biomarker in routine examination of acute ischemic stroke patients including inflammation parameters that contribute to the pathophysiology of brain ischemic. The purpose in this study was to identify correlation between ESR level and ASPECTS in ischemic stroke patients. The method of study was analytical observational cross sectional taken from medical record. It was performed in 16 patients that fulfill the inclusion and exclusion criteria during December 2012- October 2014. Several characteristics of subject that affecting ASPECTS included age, gender, hypertention, diabetes mellitus, dyslipidemia, ESR level 1 and 2, and onset of acute ischemic stroke were assessed. Analytical test was performed by Rank spearman’s test and multivariate test. There was no correlation between ASPECTS with ESR level and factors that affect ASPECTS.

scholarly journals The Relationship between Risk Factors of Head Trauma with CT Scan Findings in Children with Minor Head Trauma Admitted to Hospital

2017 ◽  
Vol 5 (3) ◽  
pp. 319-323 ◽  
Author(s):  
Babak Masoumi ◽  
Farhad Heydari ◽  
Hamidreza Hatamabadi ◽  
Reza Azizkhani ◽  
Zahra Yoosefian ◽  
...  
Keyword(s):  
Risk Factors ◽  
Emergency Department ◽  
Ct Scan ◽  
Head Trauma ◽  
Predictive Value ◽  
Tissue Injury ◽  
Soft Tissue Injury ◽  
Normal Brain ◽  
Brain Ct ◽  
Brain Ct Scan

BACKGROUND: In emergency medicine for determining the intracranial injury (ICI) in children with head trauma, usually brain CT scan is performed. Since brain CT scan, especially in children, has some disadvantages, it is better to find a procedure which could help to choose only the children with real head trauma injury for brain CT scan.AIMS: The aim of this study is to find such procedure. This study was descriptive, analytic and non-interventional.METHODS: We reviewed the archived files of children with head trauma injuries referred to the emergency department of Imam Hossein Hospital within two years. Patient’s CT scan findings and head trauma risk factors were evaluated in this study.RESULTS: Out of 368 patients, 326 patients had normal brain CT scan. 28 of them showed symptoms of ICI consisting intraventricular haemorrhage (IVH), contusion, subarachnoid haemorrhage (SAH), subdural haemorrhage (SDH), epidural hematoma (EDH), and pneumocephalus. Twenty-seven patients showed skull FX, which 14 of them had an Isolated fracture, and 13 of them also showed symptoms of ICI. Since patients with isolated FX usually discharge quickly from Emergency Department; their data did not include in results of the study. The patients have been divided into two groups: 1- ICI, 2- without ICI. RR (relative risk), CI (Confidence interval) and sensitivity, positive predictive value (PPV), negative predictive value (NPV) and association of these risk factors with ICI were assessed with the Chi-2 test. In the end to determine the indications of CT scan, the presence of one of these five risk factors is important including abnormal mental status, clinical symptoms of skull FX, history of vomiting, craniofacial soft tissue injury (including subgaleal hematomas or laceration) and headache.CONCLUSIONS: For all other patients without these risk factors, observation and Follow Up can be used which has more advantages and less cost.

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