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Sphenoid bone

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https://www.readbyqxmd.com/read/29346169/sphenoid-dysplasia-a-rare-presentation-of-infantile-myofibroma
#1
Ashwini Kini, Reema Syed, Christopher Compton, Jessica L Hata, Aparna Ramasubramanian
The authors report a case of isolated congenital orbital myofibroma causing sphenoid dysplasia and presenting as global restriction of extraocular motility and ptosis in a neonate. Sphenoid wing dysplasia is most commonly associated neurofibromatosis 1 but this patient had no evidence of neurofibromatosis on clinical examination and genetic testing. Congenital orbital myofibroma can have secondary effects on bone and likely the lesion was present early in development leading to aplasia of the sphenoid bone...
January 17, 2018: Ophthalmic Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/29342033/meningoencephalocele-and-cerebrospinal-fluid-leak-complicating-orbital-decompression
#2
Liza M Cohen, Juan C Jiménez Pérez, Eric H Holbrook, William T Curry, Michael K Yoon
A 51-year-old man who had undergone right orbital decompression 5 months earlier developed a meningoencephalocele extending in the right sphenoid sinus through a skull base defect of the right ethmoid, sphenoid, and frontal bones. The authors report the third case to their knowledge of meningoencephalocele with cerebrospinal fluid leak after orbital decompression and discuss its management and measures that can be taken to prevent this rare but serious complication.
January 16, 2018: Ophthalmic Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/29338280/variable-skeletal-anatomical-features-of-acromegaly-in-the-skull-and-craniocervical-junction
#3
Maria Piagkou, Othon Manolakos, Theodore Troupis, Nikolaos Lazaridis, Konstantinos Laios, Alexandros Samolis, Konstantinos Natsis
OBJECTIVE: This study adds important information regarding the morphological alterations caused by growth hormone hypersecretion in the skull and craniocervical junction (CCJ). A variably asymmetric skull due to acromegaly coexists with expansion of the paranasal sinuses and multiple Wormian bones. CASE REPORT: A pathologically asymmetric dry skull of a European male, aged 38 years at death, with cranial vault and skull base thickening is described. The extensive paranasal sinus pneumatization caused a generalized thinning of the bony walls...
November 2017: Acta Medica Academica
https://www.readbyqxmd.com/read/29325963/surgical-anatomy-of-the-eustachian-tube-for-endoscopic-transnasal-skull-base-surgery-a-cadaveric-and-radiological-study
#4
Noritaka Komune, Satoshi Matsuo, Koichi Miki, Yojiro Akagi, Ryota Kurogi, Koji Iihara, Takashi Nakagawa
OBJECTIVE: The endoscopic endonasal approach to the anatomically complex lateral skull base presents technical challenges. The use of the Eustachian tube as a landmark to identify the petrous internal carotid artery has recently been reported, and this study aims to define the anatomical relationship between the Eustachian tube and its surrounding structures using cadaveric dissection and radiologic analysis. METHODS: To clarify the relationship of the Eustachian tube with its surrounding structures, we performed endoscopic and microscopic dissection of four adult cadaveric heads, and analyzed computed topography scans from 20 patients...
January 8, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29324473/chondromyxoid-fibroma-arising-in-craniofacial-sites-a-clinicopathologic-analysis-of-25-cases
#5
David M Meredith, Christopher D M Fletcher, Vickie Y Jo
Chondromyxoid fibroma (CMF) is a rare benign tumor, usually arising in the metaphysis of long bones in young adults. Occurrence in craniofacial bones presents a particular diagnostic challenge given its unusual location and resemblance to malignant mimics. We describe the clinicopathologic features of 25 cases of craniofacial CMF identified between 1999 and 2017. Patients were 14 men and 11 women, with median age of 44 years (range, 5 to 83 y). Sites of involvement were sphenoid (7), ethmoid (5), maxilla (3), occipital (2), nasal septum (2), palatine (2), temporal (2), orbit (1), and undisclosed skull (1)...
January 10, 2018: American Journal of Surgical Pathology
https://www.readbyqxmd.com/read/29319638/anomalous-sphenoid-diploe-vein-case-report-highlighting-the-value-of-careful-ct-evaluation-prior-to-decompression-surgery
#6
Michael Rafaelof, Hamzah Mustak, Daniel B Rootman
Lateral bony decompression may offer several biomechanical advantages and has become a commonly used surgical approach. Preoperative imaging plays a key role in surgical planning by providing information about the locoregional anatomy. The marrow space of the greater wing of the sphenoid is a focal point of the decompression surgery based on the volume that it occupies. Several vessels pass through the sphenoid bone, but most are small caliber vessels. The authors describe a case of an uncommon anatomical variant of the cranial diploic venous system in which the anterior transverse diploic vessel traverses the marrow space of the sphenoid...
January 9, 2018: Ophthalmic Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/29317363/spheno-orbital-meningiomas-surgery-multicenter-management-study-for-complex-extensive-tumors
#7
Louis-Marie Terrier, Florian Bernard, Henri-Dominique Fournier, Xavier Morandi, Stéphane Velut, Pierre-Louis Hénaux, Aymeric Amelot, Patrick François
BACKGROUND: Spheno-orbital meningiomas (SOMs) are complex tumors involving the sphenoid wing, the orbit, and sometimes the cavernous sinus with bone hyperostosis and sheet-like dural involvement. Optimal removal, proptosis cure and visual preservation remain a challenge. OBJECTIVE: To study the management of surgically treated SOMs METHODS: The clinical records of 130 consecutive patients undergoing surgery for SOMs were retrospectively collected in a database during a 20-year period to analyze symptoms, surgical technique, clinical outcome, and follow-up...
January 6, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29291204/embryonal-rhabdomyosarcoma-in-the-maxillary-sinus-with-orbital-involvement-in-a-pediatric-patient-case-report
#8
Ana Carolina Rodrigues de Melo, Tácio Candeia Lyra, Isabella Lima Arrais Ribeiro, Alexandre Rolim da Paz, Paulo Rogério Ferreti Bonan, Ricardo Dias de Castro, Ana Maria Gondim Valença
This report presents a case of embryonal rhabdomyosarcoma (eRMS) located in the left maxillary sinus and invading the orbital cavity in a ten-year-old male patient who was treated at a referral hospital. The images provided from the computed tomography showed a heterogeneous mass with soft-tissue density, occupying part of the left half of the face inside the maxillary sinus, and infiltrating and destroying the bone structure of the maxillary sinus, left orbit, ethmoidal cells, nasal cavity, and sphenoid sinus...
December 16, 2017: World Journal of Clinical Cases
https://www.readbyqxmd.com/read/29286362/dissection-and-coronal-slice-preparation-of-developing-mouse-pituitary-gland
#9
Dongmei Cao, Xianhua Ma, Weiping J Zhang, Zhifang Xie
The pituitary gland or hypophysis is an important endocrine organ secreting hormones essential for homeostasis. It consists of two glands with separate embryonic origins and functions - the neurohypophysis and the adenohypophysis. The developing mouse pituitary gland is tiny and delicate with an elongated oval shape. A coronal section is preferred to display both the adenohypophysis and neurohypophysis in a single slice of the mouse pituitary. The goal of this protocol is to achieve proper pituitary coronal sections with well-preserved tissue architectures from developing mice...
November 16, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29279809/duplication-of-the-sphenomandibular-ligament
#10
Emily Simonds, Joe Iwanaga, Rod J Oskouian, R Shane Tubbs
The normal origin of attachment of the sphenomandibular ligament is from the spine of the sphenoid bone and derailment of its course might interfere with mandibular nerve anesthetic blockade. During routine dissection of the skull base and mandibular region, a case of an anatomical variation of the sphenomandibular ligament was observed. The ligament was found to be composed of two parts; an anterior part with a wide origin from the spine of the sphenoid bone and a posterior part arising from the mandibular fossa of the temporal bone...
October 18, 2017: Curēus
https://www.readbyqxmd.com/read/29261632/primary-aspergillosis-of-the-sphenoid-sinus-observed-on-bone-spect-ct
#11
Seung Hyun Son, Shin Young Jeong, Sang-Woo Lee, Byeong-Cheol Ahn, Jaetae Lee
The bone SPECT/CT allows for precise anatomic delineation of bone activity, which can be valuable for diagnosis of nonmalignant bone diseases. We report an extremely rare case of sphenoid sinus aspergillosis, observed on bone SPECT/CT imaging, as an isolated disease in an immunocompetent individual. A 58-year-old woman with a history of plantar fasciitis was assessed for infection in the tarsal bones. Planar bone scan image revealed incidental focal lesion in skull base, which was considered to be the left sphenoid sinusitis by the bone SPECT/CT scan...
December 19, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/29243982/endoscopic-transorbital-superior-eyelid-approach-anatomical-study-from-a-neurosurgical-perspective
#12
Alberto Di Somma, Norberto Andaluz, Luigi Maria Cavallo, Matteo de Notaris, Iacopo Dallan, Domenico Solari, Lee A Zimmer, Jeffrey T Keller, Mario Zuccarello, Alberto Prats-Galino, Paolo Cappabianca
OBJECTIVE Recent studies have proposed the superior eyelid endoscopic transorbital approach as a new minimally invasive route to access orbital lesions, mostly in otolaryngology and maxillofacial surgeries. The authors undertook this anatomical study in order to contribute a neurosurgical perspective, exploring the anterior and middle cranial fossa areas through this purely endoscopic transorbital trajectory. METHODS Anatomical dissections were performed in 10 human cadaveric heads (20 sides) using 0° and 30° endoscopes...
December 15, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/29209883/disseminated-juvenile-xanthogranuloma-occurring-after-treatment-of-langerhans-cell-histiocytosis-a-case-report
#13
Tae-Kyu Lee, Tae-Young Jung, Hee-Jo Baek, Seul-Kee Kim, Kyung-Hwa Lee, Sook Jung Yun
CASE PRESENTATION: An 11-year-old boy presented with a complaint of a painful temporal mass. Brain magnetic resonance imaging (MRI) showed a 3-cm-sized, homogeneously enhancing mass in the greater wing of the left sphenoid bone, which was diagnosed as Langerhans cell histiocytosis (LCH). Chemotherapy with vincristine and prednisolone was performed for 1 year. After 1 year and 11 months off treatment, he developed symptoms such as polydipsia and polyuria. Brain MRI showed thickening of the pituitary stalk with enhancement, suggestive of LCH involvement, and no recurrence in the sphenoid bone...
December 5, 2017: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
https://www.readbyqxmd.com/read/29193866/revisit-the-cavernous-sinus-from-fetus-to-adult-new-and-old-data
#14
REVIEW
Maggie Sm Chow, Sharon L Wu, Vivian Hui, Tony Ch Chow, D T Yew
This paper highlighted three advances in the study of the cavernous sinus: 1) the initial formation of the sinus reticulum in early development of the sphenoid bone before ossification 2) extension of reticulum of the sinus and connection with other venules and 3) the cavernous sinus and the nerves evolved inside this sinus during gestation, for example, the trigeminal nerve already formed bundles of motor and parasympathetic components during fetal development. This ontogenetic study further confirmed the cavernous sinus is not a single or a dual set of sinuses, but a group of extensions of venous sinuses or sinusoids...
November 28, 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/29166425/anatomy-of-the-sphenopalatine-artery-and-its-implications-for-transnasal-neurosurgery
#15
M Eordogh, A Grimm, I Gawish, L Patonay, R Reisch, H R Briner, G Baksa
BACKGROUND: The knowledge of sinonasal vasculature is inevitable in transnasal neurosurgery. We performed an anatomical study on the sphenopalatine artery from the perspective of skull base procedures. METHODOLOGY: To analyse the anatomical landmarks of the sphenopalatine artery, arterial skull corrosion casts (26 head halves) underwent endoscopic transnasal phantom surgery. Furthermore, we performed microsurgical dissection on formaldehyde-fixated cadavers with arterial perfusion (14 head halves) as well as studied Cone Beam CT-scans of anonymised patients and cadavers (115 head sides)...
November 22, 2017: Rhinology
https://www.readbyqxmd.com/read/29138975/distal-transsylvian-keyhole-approach-for-unruptured-anterior-circulation-small-aneurysms
#16
Ririko Takeda, Hiroki Kurita
BACKGROUND: To reduce complications associated with conventional pterional craniotomy, a transsylvian keyhole approach for unruptured small anterior circulation aneurysms is proposed. METHODS: A 7-cm linear scalp incision is made along the hairline, beginning at the zygoma, followed by minimal temporal muscle dissection. Two burr holes are drilled out at McCarty's point and the temporal bone, and a 3-cm equilateral triangle bone flap is made, whose apex is located above the sylvian point...
November 14, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/29134161/pneumatization-patterns-of-the-petrous-apex-and-lateral-sphenoid-recess
#17
Alexander Malone, Margherita Bruni, Robert Wong, Mark Tabor, K Paul Boyev
Introduction  The petrous apex poses a challenge for surgical intervention due to poor access. As intraoperative image guidance and surgical instrumentation improve, newer endoscopic approaches are increasingly favored. This study aims to provide normative data on the anatomy of the lateral sphenoid sinus recess and petrous apex. These normative data could assist in determining the efficacy of a transnasal transsphenoidal approach to lesions of the anteroinferior petrous apex. Methods  This is a retrospective study investigating normative data on all maxillofacial computed tomography (CT) scans performed at a level I trauma center over a 6-month period...
December 2017: Journal of Neurological Surgery. Part B, Skull Base
https://www.readbyqxmd.com/read/29068968/isolated-intraorbital-frontosphenoidal-synostosis
#18
Paul A Mittermiller, Kristen W Yeom, Robert M Menard
Unilateral anterior plagiocephaly is most commonly the result of deformational plagiocephaly or unilateral coronal synostosis, a premature fusion of the frontoparietal suture. However, other sutures within the coronal ring have been implicated in producing anterior cranial asymmetries. These fusions can occur in isolation or in concert with adjacent sutures. The frontosphenoidal suture is one such suture within the coronal ring that has been involved both concomitantly with and independently of frontoparietal suture fusion...
October 24, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29061457/3d-printed-craniosynostosis-model-a-new-simulation-surgical-tool
#19
Enrico Ghizoni, João Paulo Sant Ana Santos de Souza, Cassio Eduardo Raposo-Amaral, Rafael Denadai, Humberto Belém de Aquino, Cesar Augusto Raposo-Amaral, Andrei Fernandes Joaquim, Helder Tedeschi, Luís Fernando Bernardes, André L Jardini
BACKGROUND: Craniosynostosis is a complex disease once it involves deep anatomical perception, and a minor mistake during surgery can be fatal. The objective of this report is to present novel three-dimensional (3D)-printed polyamide craniosynostosis models that can improve the understanding and treatment complex pathologies. METHODS: The software InVesalius was used for segmentation of the anatomy image (from three patients between 6 and 9 months old). Afterward, the file was transferred to a Three-Dimensional Printing (3DP) system and, with the use of an infrared laser, slices of powder PA 2200 were consecutively added to build a polyamide model of cranial bone...
October 20, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28994872/primary-ewing-s-sarcoma-of-the-sphenoid-sinus-with-orbital-and-intracranial-extension-a-case-report
#20
Senda Turki, Skander Kedous, Madiha Mahjoubi, Sawssen Dhambri, Zied Attia, Slim Touati
Ewing's sarcoma is a high-grade neuroectodermal primary bone tumor. This is the second primary bone tumor in children afterosteosarcoma and represents 4 to10% of cases. It can occur in all skeletal bones. However, the location at the facial bones is uncommon (1to2%) and extremely rare at the sphenoid sinus. We report the clinical results of a rare case of Ewing's sarcoma of the sphenoid with intraorbitaland intracranial extension.
November 2016: La Tunisie Médicale
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