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Skull base foramina

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https://www.readbyqxmd.com/read/29729847/siope-brain-tumor-group-consensus-guideline-on-craniospinal-target-volume-delineation-for-high-precision-radiotherapy
#1
Thankamma Ajithkumar, Gail Horan, Laetitia Padovani, Nicky Thorp, Beate Timmermann, Claire Alapetite, Lorenza Gandola, Monica Ramos, Karen Van Beek, Melissa Christiaens, Yasmin Lassen-Ramshad, Henriette Magelssen, Kristina Nilsson, Frank Saran, Barbara Rombi, Rolf Kortmann, Geert O Janssens
OBJECTIVE: To develop a consensus guideline for craniospinal target volume (TV) delineation in children and young adults participating in SIOPE studies in the era of high-precision radiotherapy. METHODS AND MATERIALS: During four consensus meetings (Cambridge, Essen, Liverpool, and Marseille), conventional field-based TV has been translated into image-guided high-precision craniospinal TV by a group of expert paediatric radiation oncologists and enhanced by MRI images of liquor distribution...
May 2, 2018: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
https://www.readbyqxmd.com/read/29660990/novel-radiographic-assessment-of-the-cribriform-plate
#2
Kimia G Ganjaei, Zachary M Soler, Elliott D Mappus, Robert J Taylor, Mitchell L Worley, Jennifer K Mulligan, Jose L Mattos, Nicholas R Rowan, Guilherme J M Garcia, Judy R Dubno, Mark A Eckert, Lois J Matthews, Rodney J Schlosser
Background The cribriform plate (CP) is a common site of spontaneous cerebrospinal fluid (SCSF) leaks. Radiographic assessment of the anterior and lateral skull base has shown thinner bone in patients with SCSFs; however, prior assessment of the CP has required postmortem cadaver dissection. Objective To develop novel radiographic techniques to assess the anatomy of the CP. Methods Computed tomography (CT) scans were performed on cadaveric specimens. Bone density and anatomy of a predefined volume of interest of the posterior CP were assessed by two independent reviewers...
May 2018: American Journal of Rhinology & Allergy
https://www.readbyqxmd.com/read/29534911/incidence-and-morphometry-of-sellar-bridges-and-related-foramina-in-dry-skulls-their-significance-in-middle-cranial-fossa-surgery
#3
Konstantinos Natsis, Maria Piagkou, Nikolaos Lazaridis, Trifon Totlis, Nikolaos Anastasopoulos, Jannis Constantinidis
PURPOSE: The current study investigated the incidence, morphology and morphometry of the ossified ligaments expanding between petrous bone and posterior clinoid processes and in between the anterior, middle and posterior clinoid processes. Side symmetry, gender dimorphism and age influence were also studied. MATERIALS AND METHODS: A total of 123 adult Greek dry skulls were observed. RESULTS: A caroticoclinoid bar (CCB) was found in 60.2%. Partial CCBs appeared more commonly (36...
April 2018: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/29381626/the-measurement-of-various-anatomical-structures-and-assessment-of-morphometric-development-of-fetal-skull-base
#4
Vural Hamzaoglu, Mustafa Aktekin, Onur Ismi, Hakan Ozalp, Dilan Karşiyaka, Fuat Cem Baskan, Yusuf Vayisoglu, Rabia Bozdogan Arpaci, Filiz Cayan, Can Mehmet Eti, Emine Ecem Cakir, Perihan Gocer, Merve Turkegun, Arzu Kanik, Celal Bagdatoglu, Derya Umit Talas
BACKGROUND: As the skull base has a complex anatomy, we underline the importance of anomalies for side asymmetry. It is useful to investigate relationship between anatomical structures for the surgical procedure orientations. Dural adherence, enlarged superior petrosal sinus, influence of neural crest cells, and cranial base ossification are among the factors in morphometric growth on skull base. MATERIAL AND METHODS: Twenty-five fetuses of an estimated gestational age ranging from 17 to 34 weeks were studied in the Anatomy Laboratory of Mersin University Medical Faculty...
May 2018: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29191538/collet-sicard-syndrome-attributable-to-extramedullary-plasmacytoma-of-the-jugular-foramen
#5
Soliman Oushy, Christopher S Graffeo, Avital Perry, Jonathan M Morris, Matthew L Carlson, Jamie J Van Gompel
BACKGROUND: Collet-Sicard syndrome is a rare manifestation of skull base disease involving the jugular and hypoglossal foramina. We report the first case of Collet-Sicard attributable to extramedullary plasmacytoma-multiple myeloma (EP-MM) and the second case of EP-MM precipitating a jugular foramen syndrome (JFS)-spectrum disorder. CASE DESCRIPTION: A 59-year-old woman presented with 4 months of left aural fullness and pulsatile tenderness, positional vertigo, hoarseness, and dysphagia...
February 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29075158/locoregional-and-microvascular-free-tissue-reconstruction-of-the-lateral-skull-base
#6
REVIEW
Demetri Arnaoutakis, Sameep Kadakia, Manoj Abraham, Thomas Lee, Yadranko Ducic
The goals of reconstruction following any oncologic extirpation are preservation of function, restoration of cosmesis, and avoidance of morbidity. Anatomically, the lateral skull base is complex and conceptually intricate due to its three-dimensional morphology. The temporal bone articulates with five other cranial bones and forms many sutures and foramina through which pass critical neural and vascular structures. Remnant defects following resection of lateral skull base tumors are often not amenable to primary closure...
November 2017: Seminars in Plastic Surgery
https://www.readbyqxmd.com/read/28885117/the-interperiosteodural-concept-applied-to-the-jugular-foramen-and-its-compartmentalization
#7
Florian Bernard, Ilyess Zemmoura, Jean Philippe Cottier, Henri-Dominique Fournier, Louis-Marie Terrier, Stéphane Velut
OBJECTIVE The dura mater is made of 2 layers: the endosteal layer (outer layer), which is firmly attached to the bone, and the meningeal layer (inner layer), which directly covers the brain and spinal cord. These 2 dural layers join together in most parts of the skull base and cranial convexity, and separate into the orbital and perisellar compartments or into the spinal epidural space to form the extradural neural axis compartment (EDNAC). The EDNAC contains fat and/or venous blood. The aim of this dissection study was to anatomically verify the concept of the EDNAC by focusing on the dural layers surrounding the jugular foramen area...
September 8, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28389810/perineural-spread-susceptible-structures-a-non-pathological-evaluation-of-the-skull-base
#8
Francisco J Barrera-Flores, Natalia Villarreal-Del Bosque, Alejandro Díaz González-Colmenero, Carolina Garza-González, Rodolfo Morales-Ávalos, Ricardo Pinales-Razo, Guillermo Elizondo-Riojas, Santos Guzmán-López, Rodrigo E Elizondo-Omaña
Perineural spread adenoid cystic carcinoma can alter the dimension of foramina and canals of the skull base. The objective of this study was to determine the range of normal variation of the foramina and canals of both hemicranium. We analyzed 200 individuals with no alterations of the skull base in a retrospective manner using high-resolution computed tomography. We measured the short and long axis diameters of the foramen rotundum (FR), foramen ovale (FO), stylomastoid foramen (SMF), pterygoid canal (PTC), internal auditory canal (IAC), and the facial nerve canal in its labyrinthine portion (LPFC) to calculate the area in each hemicranium, compare them and obtain the normal range of asymmetry...
July 2017: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/28318880/highly-conformal-craniospinal-radiotherapy-techniques-can-underdose-the-cranial-clinical-target-volume-if-leptomeningeal-extension-through-skull-base-exit-foramina-is-not-contoured
#9
D J Noble, T Ajithkumar, J Lambert, I Gleeson, M V Williams, S J Jefferies
AIMS: Craniospinal irradiation (CSI) remains a crucial treatment for patients with medulloblastoma. There is uncertainty about how to manage meningeal surfaces and cerebrospinal fluid (CSF) that follows cranial nerves exiting skull base foramina. The purpose of this study was to assess plan quality and dose coverage of posterior cranial fossa foramina with both photon and proton therapy. MATERIALS AND METHODS: We analysed the radiotherapy plans of seven patients treated with CSI for medulloblastoma and primitive neuro-ectodermal tumours and three with ependymoma (total n = 10)...
July 2017: Clinical Oncology: a Journal of the Royal College of Radiologists
https://www.readbyqxmd.com/read/28224379/nerves-of-steel-a-low-cost-method-for-3d-printing-the-cranial-nerves
#10
Ramin Javan, Duncan Davidson, Afshin Javan
Steady-state free precession (SSFP) magnetic resonance imaging (MRI) can demonstrate details down to the cranial nerve (CN) level. High-resolution three-dimensional (3D) visualization can now quickly be performed at the workstation. However, we are still limited by visualization on flat screens. The emerging technologies in rapid prototyping or 3D printing overcome this limitation. It comprises a variety of automated manufacturing techniques, which use virtual 3D data sets to fabricate solid forms in a layer-by-layer technique...
October 2017: Journal of Digital Imaging: the Official Journal of the Society for Computer Applications in Radiology
https://www.readbyqxmd.com/read/28153164/growth-changes-in-the-anterior-and-middle-cranial-bases-assessed-with-cone-beam-computed-tomography-in-adolescents
#11
Mona Afrand, Heesoo Oh, Carlos Flores-Mir, Manuel O Lagravère-Vich
INTRODUCTION: Initially, cone-beam computed tomography images from dry skulls were used to 3 dimensionally evaluate intrarater and interrater reliabilities and accuracy of selected 3-dimensional landmarks located in the anterior and middle cranial bases. Thereafter, dimensional changes of the anterior and middle cranial bases with growth were evaluated by using the previously selected landmarks. METHODS: Cone-beam computed tomography images of 10 dry skulls were used to identify useful landmarks from different areas of the anterior and middle cranial bases based on their reliability and accuracy...
February 2017: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/27977492/analysis-of-anatomical-characteristics-and-morphometric-aspects-of-infraorbital-and-accessory-infraorbital-foramina
#12
Paulo Antônio Martins-Júnior, Cristiano Pereira Rodrigues, Marilda Luz de Andrade De Maria, Larissa Matias Nogueira, Janice Henriques da Silva, Micena Roberta Miranda Alves E Silva
OBJECTIVE: This study aimed to perform a morphological and morphometric study of the characteristics of the infraorbital foramen (IOF) and accessory infraorbital foramen (AIOF) in Brazilian skulls. METHODS: A sample calculation determined a total of 94 human skulls to be evaluated by a trained examiner for number, shape, diameters, and location of IOF in relation to anatomical landmarks. Number, size, shape, diameters, location, orientation, position, and distances in relation to anatomical landmarks were evaluated for the AIOF...
March 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/27932266/pterygopalatine-fossa-not-a-mystery
#13
Betul Emine Derinkuyu, Oznur Boyunaga, Cigdem Oztunali, Ayse Gul Alimli, Murat Ucar
The pterygopalatine fossa is an important anatomic crossroads that is connected with numerous intra- and extracranial spaces via foramina and fissures. Although this fossa is small, its central location in the skull base and its communications provide clinical, radiological, and anatomical significance. In this pictorial review, we aimed to describe the radiologic anatomy of the pterygopalatine fossa, as well as to give some pathologic examples to better understand this major conduit.
May 2017: Canadian Association of Radiologists Journal, Journal L'Association Canadienne des Radiologistes
https://www.readbyqxmd.com/read/27884603/cranial-nerve-involvement-in-charcot-marie-tooth-disease
#14
Nirav Das, Savannah Kandalaft, Xiao Wu, Ajay Malhotra
BACKGROUND: Charcot-Marie-Tooth Disease (CMT) is a rare disorder with less than 200,000 cases reported in the US every year, making diagnosis challenging. MR and CT imaging has become more common in the evaluation of CMT to identify areas of disease involvement. CASE REPORT: A 27-year-old female from Guatemala with a past history of polio initially presented to the emergency room for necrotizing pneumonia. MRI images demonstrated smoothly enlarged, mildly enhancing trigeminal nerves...
March 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/27860392/novel-ct-guided-biopsy-of-isolated-perineural-spread-of-adenoid-cystic-carcinoma-along-the-trigeminal-nerve-masquerading-as-chronic-trigeminal-neuropathy
#15
Xian Zhang Eric Yong, Jonathan Dillon, Paul Smith, Cesar Salinas-La Rosa, Ashu Jhamb
The differential diagnoses for chronic peripheral neuropathy are broad and diagnosing a cause can be challenging. We present a case of isolated perineural spread of adenoid cystic carcinoma to the trigeminal nerve involving skull base foramina and Meckel's cave in the setting of chronic trigeminal neuropathy and no known prior malignancy. Computed tomography-guided core (CT) needle biopsy was needed to arrive at a diagnosis and a novel approach was required to obtain tissue from the trigeminal nerve lesion at foramen ovale...
February 2017: Journal of Medical Imaging and Radiation Oncology
https://www.readbyqxmd.com/read/27837265/unusual-foramen-in-the-middle-cranial-fossae-of-adult-black-south-african-skull-specimens
#16
Pedzisai Mazengenya, Okobi Ekpo
Variations of the skull base foramina are quite common and often cause surgical confusion during surgical intervention of the region. The unusual foramen was observed in five (0.98%) adult skulls of black South Africans obtained from the Raymond A Dart collection of human specimens housed in the School of Anatomical Sciences at the University of the Witwatersrand. Three of the five specimens were females while the remaining two were males. In four of the five skulls, the unusual foramen was located anterolateral to the foramen rotundum both on the left and right sides...
July 2017: Surgical and Radiologic Anatomy: SRA
https://www.readbyqxmd.com/read/27594963/craniometaphyseal-dysplasia-in-a-14-month-old-a-case-report-and-review-of-imaging-differential-diagnosis
#17
Sumit Singh, Curtis Qin, Srikanth Medarametla, Shilpa V Hegde
We report a 14-month-old male with craniometaphyseal dysplasia (CMD). The patient presented with a history of diminishing vision and hearing loss. Cranial computed tomography scan showed diffuse calvarial and skull base hyperostosis with excessive bone narrowing the internal auditory canals and skull base foramina. A subsequent skeletal survey revealed other skeletal abnormalities, which led to the diagnosis of CMD. This was later confirmed by ANKH mutation. CMD is a rare genetic disorder that belongs to the group of craniotubular bone dysplasias...
September 2016: Radiology Case Reports
https://www.readbyqxmd.com/read/27588370/combined-approaches-to-the-skull-base-for-intracranial-extension-of-tumors-via-perineural-spread-can-improve-patient-outcomes
#18
Sheri K Palejwala, Jonnae Y Barry, Crystal N Rodriguez, Chandni A Parikh, Stephen A Goldstein, G Michael Lemole
Many neoplasms of the head and neck extend centripetally, gaining access to the central nervous system via nerves through the skull base foramina. Often patients with perineural spread have been excluded from aggressive interventions given the overall poor prognosis and technical difficulty when addressing the perineural components. However, in carefully selected patients combined surgical approaches can provide the greatest potential for disease control as well as neural decompression for symptom relief. We performed a retrospective chart review of 20 consecutive patients who underwent skull base approaches for resection of tumors with intracranial extension via perineural spread from 2011 to 2014...
November 2016: Clinical Neurology and Neurosurgery
https://www.readbyqxmd.com/read/27541436/cranial-nerve-schwannomas-diagnostic-imaging-approach
#19
REVIEW
Aaron D Skolnik, Laurie A Loevner, Deepak M Sampathu, Jason G Newman, John Y Lee, Linda J Bagley, Kim O Learned
Schwannomas are benign nerve sheath tumors that may arise along the complex course of the cranial nerves (CNs), anywhere in the head and neck. Sound knowledge of the CN anatomy and imaging features of schwannomas is paramount for making the correct diagnosis. In this article, we review approaches to diagnosing CN schwannomas by describing their imaging characteristics and the associated clinical presentations. Relevant anatomic considerations are highlighted by using illustrative examples and key differential diagnoses categorized according to regions, which include the anterior skull base, orbit, cavernous sinus, basal cisterns, and neck...
September 2016: Radiographics: a Review Publication of the Radiological Society of North America, Inc
https://www.readbyqxmd.com/read/27432686/imaging-of-skull-base-lesions
#20
REVIEW
Hillary R Kelly, Hugh D Curtin
Skull base imaging requires a thorough knowledge of the complex anatomy of this region, including the numerous fissures and foramina and the major neurovascular structures that traverse them. Computed tomography (CT) and magnetic resonance imaging (MRI) play complementary roles in imaging of the skull base. MR is the preferred modality for evaluation of the soft tissues, the cranial nerves, and the medullary spaces of bone, while CT is preferred for demonstrating thin cortical bone structure. The anatomic location and origin of a lesion as well as the specific CT and MR findings can often narrow the differential diagnosis to a short list of possibilities...
2016: Handbook of Clinical Neurology
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