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Sphenoid bone

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https://www.readbyqxmd.com/read/28799880/a-morphometric-survey-of-the-parasellar-region-in-more-than-2700-skulls-emphasis-on-the-middle-clinoid-process-variants-and-implications-in-endoscopic-and-microsurgical-approaches
#1
Akshay Sharma, Gabrielle E Rieth, Joseph E Tanenbaum, James S Williams, Nakao Ota, Srikant Chakravarthi, Sunil Manjila, Amin Kassam, Bulent Yapicilar
OBJECTIVE The middle clinoid process (MCP) is a bony projection that extends from the sphenoid bone near the lateral margin of the sella turcica. The varied prevalence and morphological features of the MCP in populations stratified by age, race, and sex are unknown; however, the knowledge of its anatomy and preoperative recognition on CT scans can aid greatly in complication avoidance and management. The aim of this study was to further illustrate the surgical anatomy of the parasellar region and to quantify the incidence of MCP and caroticoclinoid rings (CCRs) in dried preserved human anatomical specimens...
August 11, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28770205/fatal-mycotic-aneurysm-of-the-basilar-artery-caused-by-aspergillus-fumigatus-in-a-patient-with-pituitary-adenoma-and-meningitis
#2
Martin Winterholler, Roland Coras, Walter Geißdörfer, Rudolf Rammensee, Philipp Gölitz, Christian Bogdan, Roland Lang
Fungal infections of the central nervous system (CNS) frequently occur in immunosuppressed patients. Here, we describe the case of an immunocompetent 64-year-old man who presented with diplopia, right-sided hemiparesis, and a mild headache after cleaning and replacing nesting boxes of wild birds during the preceding months. Lumbar puncture revealed pleocytosis, elevated protein, and lactate levels in the cerebrospinal fluid (CSF). Initial imaging showed ischemia in the left thalamus and an enlargement of the sellar region...
2017: Frontiers in Medicine
https://www.readbyqxmd.com/read/28765065/reconstructive-outcome-of-intraoperative-cerebrospinal-fluid-leak-after-endoscopic-endonasal-surgery-for-tumors-involving-skull-base
#3
Chi-Man Jeon, Sang Duk Hong, Ho Jun Seol, Jung-Il Lee, Do-Hyun Nam, Yoon Jung Hwang, Doo-Sik Kong
Endoscopic transnasal surgery for tumors located at the base of the skull has a high incidence of postoperative cerebrospinal fluid (CSF) leaks. Here, we assessed the repair outcomes for high-flow CSF leaks based upon the tumor location, and analyzed the reasons for repair failure after transnasal endoscopic surgery solely for tumors involving the base of the skull. From Feb. 2009 to Dec. 2014 we performed endoscopic endonasal surgery for a variety of skull base lesions in 788 patients at our institution. Among them, 95 patients with intradural skull base tumors underwent endoscopic transnasal surgery...
July 29, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/28751182/unilateral-blindness-after-orthognathic-surgery-hypotensive-anaesthesia-is-not-the-primary-cause
#4
Á Rodríguez-Navarro, F M Gonzalez-Valverde
Perioperative vision loss in non-ocular surgery represents a rare but devastating complication and multiple causes have been proposed. Any portion of the visual system may be involved and several authors have tried to relate that complication with deliberate hypotension anaesthetic technique, used to control intraoperative bleeding. We report a patient operated for orthognathism who suffered unilateral blindness. After review of similar cases, we can state that the transmission of forces generated during Le fort I osteotomy is related to the complication...
July 24, 2017: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28749846/three-dimensional-radiologic-study-on-index-measurement-of-endonasal-endoscopic-optic-nerve-decompression
#5
Yao Zhao, Haobo Duan, Jianming Liu, Kailiang Cheng, Yingying Han, Youqiong Li
OBJECTIVE: To provide the radiologic basis for the clinical application of endonasal endoscopic optic nerve decompression (EEOND). METHODS: CTA images were used to observe the optic canal (OC) and related structures of 60 patients (120 sides) with normal nasal, paranasal sinuses, OC, and other related structures. RESULTS: Optic canal could be classified as: the canal (10 sides, 8.33%), the semicanal (25 sides, 20.83%), the impression (49 sides, 40...
July 26, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28739401/a-review-of-nasal-paranasal-and-skull-base-tumors-invading-the-orbit
#6
REVIEW
Morten Jørgensen, Steffen Heegaard
Tumors that invade the orbit are uncommon. The majority are meningiomas arising from the sphenoid ridge (66 %). Others are bone and cartilage tumors arising from the surrounding bones surrounding the orbit, pituitary adenomas, and epithelial tumors arising from the paranasal sinuses and nasal cavity. Meningiomas occur more often in females, whereas epithelial tumors have a predilection for males. Meningiomas and epithelial tumors typically present in the sixth decade of life, whereas bone tumors tend to affect individuals in their third decade of life...
July 21, 2017: Survey of Ophthalmology
https://www.readbyqxmd.com/read/28728241/-petrous-bone-cholesteatoma-surgery-approach-and-outcomes
#7
R Y Wang, W J Han, T Zhang, W D Shen, J Liu, P Dai, S M Yang, D Y Han
Objective: To investigate the choice of surgical approach of petrous bone cholesteatoma (PBC)and surgical outcomes. Methods: A retrospective study was performed on 90 patients diagnosed and treated for PBC from January 2000 to December 2014 by the Chinese People's Liberation Army General Hospital otolaryngologists. According to Sanna's classification, 40 out of the 90 cases were supralabyrinthine, five infralabyrinthine, four infralabyrinthine-apical, 25 massive and 16 apical. Five cases underwent transmastoid and retrolabyrinthine approach, translabyrinthine approach was performed on six patients, 19 cases underwent subtotal petrosectomy, seven cases underwent transotic approach, 41 cases underwent middle fossa approach, combined transmastoid/middle fossa approach was performed on 11 cases, translabyrinthine and sphenoid sinus approach were performed on one case...
July 7, 2017: Zhonghua Er Bi Yan Hou Tou Jing Wai Ke za Zhi, Chinese Journal of Otorhinolaryngology Head and Neck Surgery
https://www.readbyqxmd.com/read/28721218/spontaneous-reossification-of-the-sella-in-transsphenoidal-reoperation-associated-with-strontium-ranelate
#8
Maria Mercedes Pineyro, Daiana Arrestia, Mariana Elhordoy, Ramiro Lima, Saul Wajskopf, Raul Pisabarro, Maria Pilar Serra
Spontaneous reossification of the sellar floor after transsphenoidal surgery has been rarely reported. Strontium ranelate, a divalent strontium salt, has been shown to increase bone formation, increasing osteoblast activity. We describe an unusual case of a young patient with Cushing's disease who was treated with strontium ranelate for low bone mass who experienced spontaneous sellar reossification after transsphenoidal surgery. A 21-year-old male presented with Cushing's features. His past medical history included delayed puberty diagnosed at 16 years, treated with testosterone for 3 years without further work-up...
2017: Endocrinology, Diabetes & Metabolism Case Reports
https://www.readbyqxmd.com/read/28720745/-a-case-of-intradural-retroclival-chordoma
#9
Hiroki Takahashi, Yasuyuki Kinoshita, Satoshi Usui, Koji Arihiro, Shuji Kimura, Takafumi Mitsuhara, Kaoru Kurisu
A 67-year-old woman was referred to our department with a retroclival lesion including a cyst on MRI. MRI revealed a lesion appearing as an isointense region on a diffusion-weighted image(DWI). Gadolinium(Gd)-DTPA T1-WI showed heterogeneous enhancement of the lesion in the prepontine cistern. Computed tomography(CT)revealed an isodense lesion with no invasion into the clival bone. Based on a preoperative diagnosis of retroclival chordoma, extended trans-sphenoidal surgery(TSS)was performed by a direct endoscopic endonasal approach via the left nostril...
July 2017: No Shinkei Geka. Neurological Surgery
https://www.readbyqxmd.com/read/28717092/cerebrospinal-fluid-rhinorrhea-and-subsequent-bacterial-meningitis-due-to-an-atypical-clival-fracture
#10
Rie Tohge, Makio Takahashi
Cases of cerebrospinal fluid (CSF) rhinorrhea due to clival fracture are rare. We present a case of bacterial meningitis with CSF rhinorrhea after a clival fracture. Heavily T2-weighted images showed a bone flap in the thinned clivus and fluid collection in the sphenoid sinus. CSF rhinorrhea developed at 1 month after mild trauma. The fracture may have been caused by the trauma and/or by the pressure gradient between the intracranial CSF space and the sphenoid sinus. A detailed history to identify trauma and an examination to detect bone defects in the skull base are necessary when patients present with bacterial meningitis and persistent rhinorrhea...
2017: Internal Medicine
https://www.readbyqxmd.com/read/28667704/growth-and-development-at-the-sphenoethmoidal-junction-in-perinatal-primates
#11
Timothy D Smith, Matthew J McMahon, Michelle E Millen, Catherine Llera, Serena M Engel, Ly Li, Kunwar P Bhatnagar, Anne M Burrows, Michael P Zumpano, Valerie B DeLeon
Integration of the sphenoid and ethmoid bones during early postnatal development is poorly described in the literature. A uniquely prolonged patency of sphenoethmoidal synchondrosis, or prespheno-septal synchondrosis (PSept) has been attributed to humans. However, the sphenoethmoidal junction has not been studied using a comparative primate sample. Here, we examined development of the sphenoethmoidal interface using ontogenetic samples of Old and New World monkeys, strepsirrhine primates (lemurs and lorises), and a comparative sample of other mammals...
July 1, 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/28650886/elevated-fdg-activity-in-the-nonpneumatized-sphenoid-bone-in-an-infant
#12
Yin Jie Chen, Nelleke Tolboom, Lisa J States, Hongming Zhuang
A 7-month-old boy with malignant rhabdoid tumor of the right lateral neck, status post resection and chemotherapy, underwent FDG PET/CT for restaging. The images showed diffuse increased activity in the spleen and in the bone marrow of the appendicular bones and the spine, which is related to hematopoietin administered after chemotherapy. The images also revealed intense activity in the region of sphenoid bone, which is not a common region to have elevated FDG activity. The subsequent MRI scan showed that this activity was due to not-yet-converted red marrow in the sphenoid bone in this pediatric patient...
June 24, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28645926/nasopharyngeal-glial-heterotopia-with-delayed-postoperative-meningitis
#13
Kenichi Maeda, Kenji Furuno, Pin Fee Chong, Takato Morioka
A male infant, who underwent radical resection of a large glial heterotopia at the nasopharynx at 8 days, developed delayed postoperative bacterial meningitis at 9 months. Neuroradiological examination clearly demonstrated that meningitis had occurred because of the intracranial and extracranial connections, which were scarcely seen in the perioperative period. A transsphenoidal extension of hypothalamic hamartoma is possible because the connection started from the right optic nerve, running through the transsphenoidal canal in the sphenoid bone and terminating at the recurrent mass in the nasopharyngeal region...
June 22, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28640138/an-unusual-presentation-of-multiple-myeloma-with-unilateral-sudden-vision-loss-a-case-report
#14
Pei-Wen Wu, Ta-Jen Lee, Jim-Ray Chen, Chien-Chia Huang
RATIONALE: Plasma cell neoplasms are categorized by neoplastic proliferation of a single clone of plasma cells which produce a monoclonal immunoglobulin. Plasma cell neoplasms can present as a solitary plasmacytoma or as multiple myeloma. Both of them can progress to multiple myeloma. Once a diagnosis of plasmacytoma has been made, thorough examinations should be carried out for identifying the disease entity. PATIENT CONCERNS AND DIAGNOSES: Herein, we describe an extraordinary rare case of multiple myeloma with initial presentation of a left sphenoid neoplasm resulting in left-sided headache and rapid deterioration of visual acuity...
June 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28637995/intracranial-bony-canal-of-the-middle-meningeal-artery-morphological-and-histological-analysis
#15
Michio Fujimoto, Naruhito Otsuka, Hiromitsu Ezure, Hiroshi Moriyama, Yuriko Inoue, Ryoichi Mori
The middle meningeal artery (MMA) can play an important role in the surgical revascularization. However, the MMA can be easily injured if it passes through a bony canal. We investigated the morphological and histological features of the bony canal to improve surgical results. MATERIALS AND METHODS: Fifty adult dry skulls were investigated. The length of the bony canal and the distance from the orbital rim to the bony canal were measured. Additionally, 28 cadaveric heads were examined histologically...
2017: Okajimas Folia Anatomica Japonica
https://www.readbyqxmd.com/read/28632604/reassessing-the-anatomic-origin-of-the-juvenile-nasopharyngeal-angiofibroma
#16
Colin D McKnight, Hemant A Parmar, Kuanwong Watcharotone, Suresh K Mukherji
OBJECTIVE: A modern imaging review is necessary to further define the anatomic origin of the juvenile nasopharyngeal angiofibroma. METHODS: After institutional review board approval, a search from January 1998 to January 2013 yielded 33 male patients (aged 10-23 years) with pathologically proven juvenile nasopharyngeal angiofibroma lesions, as well as pretreatment computed tomography/magnetic resonance imaging. Juvenile nasopharyngeal angiofibroma involvement was assessed in the following regions: sphenopalatine foramen, pterygopalatine fossa, vidian canal, nasopharynx, nasal cavity, sphenoid sinus, choana, pterygomaxillary fissure/masticator space, orbit, and sphenoid bone...
July 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28626415/a-case-of-childhood-onset-giant-cell-tumor-that-caused-optic-nerve-atrophy-in-both-eyes
#17
Masahiro Tonari, Junko Matsuo, Hidehiro Oku, Jun Sugasawa, Tsunehiko Ikeda, Kazunori Tatsuzawa, Tomoaki Fujita
PURPOSE: The purpose of this study was to report the case of a female patient who had a giant cell tumor in the paranasal sinus during childhood, and while undergoing multiple resection surgeries experienced optic atrophy in both eyes. CASE PRESENTATION: This study involved a 35-year-old woman who was previously diagnosed with a giant cell tumor of the paranasal sinus bone at age 13. A CT scan revealed a large tumor extending from the sphenoid sinus to the ethmoid sinus...
May 2017: Case Reports in Ophthalmology
https://www.readbyqxmd.com/read/28618344/developmental-mechanism-of-muscle-tendon-bone-complex-in-the-fetal-soft-palate
#18
Michiyuki Nara, Kei Kitamura, Masahito Yamamoto, Ryotaro Nagakura, Keisuke Mitomo, Satoru Matsunaga, Shinichi Abe
OBJECTIVE: This study was performed to investigate how the palatine aponeurosis, medial pterygoid process (MPP) of the sphenoid bone, and tensor veli palatini (TVP) muscle form the pulley: muscle-tendon-bone complex. DESIGN: Mice at embryonic day (ED) 14-17 were used as sample in this study. Azan staining was performed to observe the morphology, and immunohistochemical staining of desmin was performed to closely observe the development of the myotendinous junction...
June 6, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/28602922/the-spheno-pterional-point-a-strategic-point-for-burr-role-placement-in-frontotemporal-craniotomies
#19
Baltazar Leão Reis, Roberto Leal da Silveira, Sebastião Nataniel Silva Gusmão
BACKGROUND: Frontotemporal craniotomies are the most commonly performed neurosurgical approaches. We studied the external bony landmarks on the lateral surface of the skull to identify a "strategic" point where both the anterior and middle cranial fossae are exposed simultaneously during frontotemporal craniotomies through a single burr hole placed over the greater wing of sphenoid bone (spheno-pterional point). OBJECTIVE: This study aimed to anatomically define the spheno-pterional point via craniometric measurements taken on the lateral surface of the human skull...
June 8, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28579581/a-nasal-osteoma-with-an-acute-course-in-a-japanese-black-heifer
#20
Reiichiro Sato, Yumi Une, Hiroo Madarame, Hyougo Hanami, Eiichi Kanai, Hironobu Murakami, Atsushi Tsukamoto, Takehito Suzuki, Hideharu Ochiai, Masato Kikuchi, Hidekazu Tanaka, Ken Onda
A 14-month-old Japanese Black heifer presented with unilateral epistaxis and mild swelling of the right face. Radiography revealed a mass with increased radiopacity on the right side of the nasal bridge, extending to the left side. Intranasal endoscopy confirmed a large tumor-like structure protruding into the nasal cavity. Following euthanasia, cranial computed tomography (CT) was performed, revealing a tumor 24.3 × 17.5 × 14.8 cm in size. The tumor occupied the entire right nasal cavity and the frontal and sphenoid sinuses...
June 2, 2017: Journal of Veterinary Medical Science
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