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Journal articles on the topic 'Petrosul)'

Author: Grafiati

Published: 4 June 2025

Last updated: 1 August 2025

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1

Paulo, Nuno Martins. "A Concise History of Petrogal (Portuguese Oil Company): An Essay." International Journal of Engineering and Management Research 8, no. 3 (2018): 153–56. https://doi.org/10.31033/ijemr.8.3.20.

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This essay is intended to be a review of the main events that contributed to the appearance of the first Portuguese oil companies (Sonap, Sacor, Cidla, Petrosul), as well as to the creation and development of Petrogal (Portuguese oil company) which led to the emergence of Galp Energy (current Portuguese oil company).

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Paulo, Nuno Martins. "A Concise History of Petrogal (Portuguese Oil Company): An Essay." International Journal of Engineering and Management Research 8, no. 3 (2018): 153–56. https://doi.org/10.5281/zenodo.3361135.

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This essay is intended to be a review of the main events that contributed to the appearance of the first Portuguese oil companies (Sonap, Sacor, Cidla, Petrosul), as well as to the creation and development of Petrogal (Portuguese oil company) which led to the emergence of Galp Energy (current Portuguese oil company).

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3

O'Leary, Maureen A., Biren A. Patel, and Mark N. Coleman. "Endocranial petrosal anatomy of Bothriogenys (Mammalia, Artiodactyla, Anthracotheriidae), and petrosal volume and density comparisons among aquatic and terrestrial artiodactyls and outgroups." Journal of Paleontology 86, no. 1 (2012): 44–50. http://dx.doi.org/10.1666/10-091.1.

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We provide the first detailed endocranial description of the petrosal bone of the ear region of the anthracotheriid artiodactyl Bothriogenys, based on two new specimens from the early Oligocene of the Jebel Qatrani Formation, Fayum, Egypt. The new fossils have petrosals with a hyperinflated (pachyostotic) tegmen tympani (the roof over the middle ear), resembling the condition in certain cetancodontans such as hippopotamids and basal cetaceamorphans (fossil stem taxa to extant Cetacea).The morphology of the petrosal, particularly its relative size and density, has been considered an important i

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Rêgo, Daniella Maria Carneiro do, Francisco Bandeira, Carlos Abath, Gustavo Andrade, and Hildo Azevedo. "Resposta do ACTH plasmático ao estímulo com CRH ou CRH + desmopressina em pacientes com síndrome de Cushing ACTH- dependente submetidos a cateterismo bilateral simultâneo dos seios petrosos inferiores." Radiologia Brasileira 40, no. 6 (2007): 397–402. http://dx.doi.org/10.1590/s0100-39842007000600008.

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OBJETIVO: Comparar a resposta do ACTH plasmático após estímulo com CRH ou CRH + desmopressina em pacientes com síndrome de Cushing ACTH-dependente que realizaram cateterismo bilateral simultâneo dos seios petrosos inferiores. MATERIAIS E MÉTODOS: O procedimento foi realizado em 21 pacientes - 14 mulheres e 7 homens - com síndrome de Cushing ACTH-dependente no período de janeiro de 1998 a dezembro de 2003. Após a cateterização de ambos os seios petrosos, amostras de sangue para ACTH foram colhidas, simultaneamente, nos seios petrosos e veia periférica, tanto no estado basal como após três e cin

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5

Doppman, J. L. "Inferior Petrosal Sinuses Sampling." Rivista di Neuroradiologia 7, no. 1 (1994): 17–26. http://dx.doi.org/10.1177/197140099400700102.

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Quando il prelievo dei seni petrosi inferiori (IPS) per la diagnosi differenziale della sindrome di Cushing fu introdotto negli ultimi anni 70, la sua validità fu sottostimata a causa della non compresa necessityà di un prelievo bilaterale. Oltrettutto, il valore di una emiipofisectomia cieca quando nessun tumore sia identificato al tavolo operatorio non è stato apprezzato fino a che non e stato introdotto il prelievo simultaneo bilaterale. Il prelievo dei seni petrosi è meglio eseguito mediante puntura bilaterale delle vene femorali, sebbene in particolari circostanze, le vene giugulari inter

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Gusmão, Sebastião, Roberto Leal Silveira, and Cassius Reis. "Estudo das estruturas neurovasculares da face posterior da pirâmide petrosa: aplicações nas abordagens do ângulo pontocerebelar." Arquivos de Neuro-Psiquiatria 61, no. 2B (2003): 441–47. http://dx.doi.org/10.1590/s0004-282x2003000300021.

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Realizou-se o estudo topográfico da face posterior da pirâmide petrosa em 20 segmentos cefálicos de cadáveres humanos. Foram medidas as distâncias entre as estruturas neurovasculares nos pontos em que elas estão em contato com a face posterior da pirâmide petrosa e realizado o estudo da relação de referências ósseas com os seios transverso e petroso superior. O resultado deste estudo foi correlacionado com as abordagens ao ângulo pontocerebelar.

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Schultz, Julia A., Rico Schellhorn, Pavel P. Skutschas, et al. "Mammalian petrosal from the Lower Cretaceous high paleo-latitude Teete locality (Yakutia, Eastern Russia)." Vertebrate Zoology 72 (April 15, 2022): 159–68. http://dx.doi.org/10.3897/vz.72.e78479.

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Abstract A mammalian petrosal from the Lower Cretaceous Teete locality in Yakutia (Russia) shows a prominent and complex system of venous channels in the bony wall of the pars cochlearis surrounding the straight cochlear canal. This complex venous system is distinctive and more strongly developed than in other mammalian petrosals. A bony ridge is present on the ventral side of the cochlear canal endocast, continuing from between fenestra vestibuli and fenestra cochleae in anterior direction. This ridge corresponds to the position of the scala tympani, and is similar to the secondary bony lamin

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Schultz, Julia A., Rico Schellhorn, Pavel P. Skutschas, et al. "Mammalian petrosal from the Lower Cretaceous high paleo-latitude Teete locality (Yakutia, Eastern Russia)." Vertebrate Zoology 72 (April 15, 2022): 159–68. https://doi.org/10.3897/vz.72.e78479.

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Abstract A mammalian petrosal from the Lower Cretaceous Teete locality in Yakutia (Russia) shows a prominent and complex system of venous channels in the bony wall of the pars cochlearis surrounding the straight cochlear canal. This complex venous system is distinctive and more strongly developed than in other mammalian petrosals. A bony ridge is present on the ventral side of the cochlear canal endocast, continuing from between fenestra vestibuli and fenestra cochleae in anterior direction. This ridge corresponds to the position of the scala tympani, and is similar to the secondary bony lamin

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9

Aboud, Emad, Walid Ibn Essayed, and Ossama Al-Mefty. "Two-Stage Double Petrosal Approach for the Total Resection of Petroclival-Cavernous Meningioma: 2-Dimensional Operative Video." Operative Neurosurgery 21, no. 1 (2021): E30—E31. http://dx.doi.org/10.1093/ons/opab049.

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Abstract The utilization of skull base approaches has markedly facilitated the safe surgical removal of challenging petroclival meningiomas.1 The anterior petrosal approach has been utilized for tumors limited to the upper clivus, above the meatus, whereas the posterior petrosal approach has been the workhorse for the resection of larger tumors in the posterior fossa extending down the clivus.2 Giant cases with extension in the middle fossa, cavernous sinus, and ventral to the brain stem would benefit from a wider exposure than each of these approaches provide. This could be achieved by total

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Bastir, Markus, Antonio Rosas, and Kazuto Kuroe. "Petrosal orientation and mandibular ramus breadth: Evidence for an integrated petroso-mandibular developmental unit." American Journal of Physical Anthropology 123, no. 4 (2004): 340–50. http://dx.doi.org/10.1002/ajpa.10313.

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Lisboa Martins, Lia Pontes, Brenda Machado Pereira, João Flávio Nogueira Júnior, and Antônio Gilson Monte Aragão Júnior. "Ápice Petroso: mucocele x cisto aracnoide. Um diagnóstico cirúrgico?" JBNC - JORNAL BRASILEIRO DE NEUROCIRURGIA 29, no. 4 (2020): 486–91. http://dx.doi.org/10.22290/jbnc.v29i4.1793.

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Introdução: Lesões no ápice petroso são geralmente assintomáticas ou relacionadas a sintomas inespecíficos. Seu diagnóstico depende dos resultados obtidos pela avaliação conjunta da tomografia computadorizada (TC) e ressonância magnética (RM). Objetivo: Relatar um caso de lesões incidentais em ápices petrosos (AP) e revisar na literatura sobre os diagnósticos diferenciais. Relato de Caso: Paciente com cervicalgia evidenciou lesões incidentais nos AP, em RM de coluna. Realizou-se investigação por TC e RM de crânio. As lesões apresentavam conteúdo cístico, remodelamento ósseo expansivo e íntima

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Magdalena, Otazú. "Cushing's Disease in Pediatric Age: A Diagnostic and Therapeutic Challenge." MAR Diabetes, Endocrinology and Obesity 2, no. 3 (2023): 10. https://doi.org/10.5281/zenodo.10437726.

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<strong><em>Abstract </em></strong> <em>We present the case of a 16-year-old male with Cushing's disease (CD) who faced diagnostic challenges due to the absence of an image on magnetic resonance imaging (MRI) of the sellar region. Despite undergoing surgical intervention, clinical and biochemical cure was not achieved. Inferior petrosal sinus sampling (IPSS) was performed for the first time in the country within this age group. The procedure proceeded without complications, leading to the establishment of a CD diagnosis. Pharmacological treatment with ketoconazole was initiated as a bridge the

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Matsushima, Ken, Toshio Matsushima, Yoshihiro Kuga, et al. "Classification of the Superior Petrosal Veins and Sinus Based on Drainage Pattern." Operative Neurosurgery 10, no. 2 (2014): 357–67. http://dx.doi.org/10.1227/neu.0000000000000323.

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Abstract BACKGROUND: The increasing number of reports of complications after sacrificing the superior petrosal veins, the largest veins in the posterior fossa, has led to a need for an increased understanding of the anatomy of these veins and the superior petrosal sinus into which they empty. OBJECTIVE: To examine the anatomy of the superior petrosal veins and their size, draining area, and tributaries, as well as the anatomic variations of the superior petrosal sinus. METHOD: Injected cadaveric cerebellopontine angles and 3-dimensional multifusion angiography images were examined. RESULTS: Th

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Braekman, J. C., D. Daloze, N. Defay, and D. Zimmermann. "Petrosin-A and -B, Two New Bis-Quinolizidine Alkaloids from the Sponge Petrosia Seriata(1)." Bulletin des Sociétés Chimiques Belges 93, no. 11 (2010): 941–44. http://dx.doi.org/10.1002/bscb.19840931102.

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Gross, Bradley A., Ian F. Dunn, Rose Du, and Ossama Al-Mefty. "Petrosal approaches to brainstem cavernous malformations." Neurosurgical Focus 33, no. 2 (2012): E10. http://dx.doi.org/10.3171/2012.6.focus12110.

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Object Although they provide excellent ventral and lateral exposure of the brainstem, petrosal approaches to brainstem cavernous malformations (CMs) are infrequently reported. Methods The authors reviewed their experience with petrosal approaches to brainstem CMs in combination with a comprehensive review of the literature to elucidate resection rates, complication rates, and outcomes. Results Including their own results, the authors found 65 cases in 20 reports of brainstem CMs treated with petrosal approaches. The specific approaches were posterior petrosal in 37 cases (57%), anterior petros

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Wible, John R. "Petrosals of Late Cretaceous marsupials from North America, and a cladistic analysis of the petrosal in therian mammals." Journal of Vertebrate Paleontology 10, no. 2 (1990): 183–205. http://dx.doi.org/10.1080/02724634.1990.10011807.

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Kakizawa, Yukinari, Hiroshi Abe, Yutaka Fukushima, Kazuhiro Hongo, Hatem El-Khouly, and Albert L. Rhoton. "The Course of the Lesser Petrosal Nerve on the Middle Cranial Fossa." Operative Neurosurgery 61, suppl_3 (2007): ONS—15—ONS—23. http://dx.doi.org/10.1227/01.neu.0000289707.49684.a3.

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Abstract Objective: The course of the lesser petrosal nerve is not well understood and may be confused with the course of the greater petrosal nerve during middle fossa surgery. The objective was to examine the course of the lesser petrosal nerve along the floor of the middle cranial fossa from the region of the geniculate ganglion to its outlet from the skull base. There are no studies focused on the course of this nerve in relationship to the floor of the middle cranial fossa. Methods: Twenty middle fossae from adult cadaveric specimens were examined using 3 to 40× magnification. Results: Th

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Zhao, Jin-cheng, and James K. Liu. "Transzygomatic extended middle fossa approach for upper petroclival skull base lesions." Neurosurgical Focus 25, no. 6 (2008): E5. http://dx.doi.org/10.3171/foc.2008.25.12.e5.

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Central skull base lesions in the upper retroclival and petroclival regions can be challenging to access because of their location anterior to the brainstem. Several transpetrosal approaches have been developed to access the petroclival junction, including anterior petrosal (anterior petrosectomy), posterior petrosal (retrolabyrinthine, translabyrinthine, transcochlear), and combined petrosal approaches. The anterior petrosal approach is best suited for upper petroclival lesions located anterior and superior to the internal auditory canal and superior to the inferior petrosal sinus. This appro

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Isolan, Gustavo Rassier, Joel Lavinsky, Victor Matheus Olaves Marques, Jander Moreira Monteiro, Ricardo Silva dos Santos, and Paulo Henrique Pires de Aguiar. "Abordajes quirúrgicos de los meningiomas petroclivales Parte 2: revisión narrativa y lo que aprendimos con 30 casos." Surgical Neurology International 13 (November 11, 2022): 515. http://dx.doi.org/10.25259/sni_696_2022.

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Antecedentes: La resección quirúrgica de los meningiomas petroclivales es un desafío debido a su ubicación profunda y su relación con las estructuras neurovasculares vitales. Por lo general, son lesiones benignas, pero pueden involucrar o infiltrar huesos en la base del cráneo, la duramadre y el tronco encefálico. Esto hace que la extirpación total sea muy difícil o imposible sin causar déficits neurológicos. El objetivo de este estudio es revisar los abordajes quirúrgicos utilizados para tratar los meningiomas petroclivales y las lecciones que hemos aprendido en el manejo quirúrgico de 30 cas

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Robson, Selina Viktor, Brendon Seale, and Jessica M. Theodor. "The petrosal and basicranial morphology of Protoceras celer." PLOS ONE 16, no. 7 (2021): e0251832. http://dx.doi.org/10.1371/journal.pone.0251832.

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Protoceratids are an extinct family of endemic North American artiodactyls. The phylogenetic position of protoceratids in relation to camelids and ruminants has been contentious for over a century. The petrosal morphology of basal (Leptotragulus) and derived (Syndyoceras) protoceratids has suggested that protoceratids are closely related to ruminants, whereas a prior description of a disarticulated intermediate protoceratid petrosal (Protoceras celer) indicated that protoceratids were closely related to camelids. This contradictory evidence implied that there were several character reversals w

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Gharabaghi, Alireza, Andrei Koerbel, Löwenheim Hubert, Jan Kaminsky, Madjid Samii, and Marcos Tatagiba. "The Impact of Petrosal Vein Preservation on Postoperative Auditory Function in Surgery of Petrous Apex Meningiomas." Operative Neurosurgery 59, suppl_1 (2006): ONS—68—ONS—74. http://dx.doi.org/10.1227/01.neu.0000219821.34450.59.

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Abstract OBJECTIVE: The importance of preserving the superior petrosal vein has received increasing attention in the surgical treatment of pathologies involving the petrous apex. Recent reports have associated postoperative auditory nerve dysfunction with petrosal vein sacrifice. However, there is no systematic clinical study available thus far focusing on the postoperative auditory function after petrosal vein obliteration. METHODS: In 55 patients with meningiomas involving the petrous apex, pre- and intraoperative findings including petrosal vein sectioning were analyzed retrospectively conc

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Nakatomi, Hirofumi, Taichi Kin, Masahiro Shimizu, et al. "Standards and Pitfalls of Petrosal Approach." Japanese Journal of Neurosurgery 24, no. 11 (2015): 751–60. http://dx.doi.org/10.7887/jcns.24.751.

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El-Khouly, Hatem, Juan Fernandez-Miranda, and Albert L. Rhoton. "Blood Supply of the Facial Nerve in the Middle Fossa: The Petrosal Artery." Operative Neurosurgery 62, suppl_5 (2008): ONS297—ONS304. http://dx.doi.org/10.1227/01.neu.0000326010.53821.a3.

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Abstract Objective: To define the arterial supply to the facial nerve that crosses the floor of the middle cranial fossa. Methods: Twenty-five middle fossae from adult cadaveric-injected specimens were examined under 3 to 40× magnification. Results: The petrosal branch of the middle meningeal artery is the sole source of supply that crossed the floor of the middle fossa to irrigate the facial nerve. The petrosal artery usually arises from the first 10-mm segment of the middle meningeal artery after it passes through the foramen spinosum, but it can arise within or just below the foramen spinos

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Matsushima, Ken, Michihiro Kohno, Nobuyuki Nakajima, and Norio Ichimasu. "Combined Transpetrosal Approach With Preservation of Superior Petrosal Vein Drainage for a Cerebellopontine Angle Epidermoid Cyst Extending Into Meckel's Cave: 3-Dimensional Operative Video." Operative Neurosurgery 16, no. 6 (2018): E172—E173. http://dx.doi.org/10.1093/ons/opy286.

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Abstract The combined transpetrosal approach enables wide exposure around the petroclival region by cutting the tentorium and superior petrosal sinus. We often choose this approach for removal of tumors ventral to the facial and vestibulocochlear nerves, such as petroclival meningioma and epidermoid cyst, because complete removal of the tumor under direct visualization is required to prevent its later recurrence, especially in young patients. Recent reports revealed anatomical variations of the drainage of the superior petrosal sinus, and dural incision considering preservation of the superior

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Kunicki, Jacek. "Superior Petrosal Vein." Journal of Neurosurgery 108, no. 5 (2008): 1065–66. http://dx.doi.org/10.3171/jns/2008/108/5/1065.

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Abdulrauf, Saleem I., and Ossama Al-Mefty. "The petrosal approach." Operative Techniques in Neurosurgery 2, no. 2 (1999): 58–61. http://dx.doi.org/10.1016/s1092-440x(99)80011-5.

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Polster, Sean P., Peleg M. Horowitz, Issam A. Awad, and Michael B. Gluth. "Combined petrosal approach." Current Opinion in Otolaryngology & Head and Neck Surgery 26, no. 5 (2018): 293–301. http://dx.doi.org/10.1097/moo.0000000000000480.

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Hafez, Ahmad, Remi Nader, and Ossama Al-Mefty. "Preservation of the superior petrosal sinus during the petrosal approach." Journal of Neurosurgery 114, no. 5 (2011): 1294–98. http://dx.doi.org/10.3171/2010.6.jns091461.

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Object The petrosal approach is based on sectioning the superior petrosal sinus (SPS) and the tentorium. However, the venous anatomy in certain situations forbids this maneuver. The authors have derived a technique that enables the SPS to be spared during the performance of the petrosal approach. They describe the anatomical basis of this technique and report on 2 cases in which the technique was applied. Methods Five alcohol-preserved cadaveric heads injected with colored silicone were used for bilateral dissection and demonstration of the technique. The described method was thoroughly invest

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Zovickian, John, Edward H. Oldfield, John L. Doppman, Gordon B. Cutler, and D. Lynn Loriaux. "Usefulness of inferior petrosal sinus venous endocrine markers in Cushing's disease." Journal of Neurosurgery 68, no. 2 (1988): 205–10. http://dx.doi.org/10.3171/jns.1988.68.2.0205.

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✓ Bilateral and simultaneous sampling of the inferior petrosal sinuses in patients with Cushing's disease has been used to establish the presence and laterality of adrenocorticotropic hormone (ACTH)-producing microad-enomas prior to transsphenoidal surgery. Successful preoperative lateralization depends upon equivalent dilution of pituitary venous blood on the two sides since samples which are diluted by unequal amounts of non-pituitary blood may lead to erroneous results. To assure valid sampling results, the use of other pituitary hormones, measured simultaneously, has been proposed to corre

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Haq, Irwan Barlian Immadoel, Rahadian Indarto Susilo, Takeo Goto, and Kenji Ohata. "Dural incision in the petrosal approach with preservation of the superior petrosal vein." Journal of Neurosurgery 124, no. 4 (2016): 1074–78. http://dx.doi.org/10.3171/2015.3.jns141618.

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The petrosal approach has been applied for the treatment of many lesions in the posterior fossa, but the location and preservation of the superior petrosal veins (SPVs) during this approach are usually not particularly considered. The authors developed a technique of dural incision with special consideration of the location of the SPVto preserve venous flow during the petrosal approach. The authors describe technical details on how to cut the dura mater and superior petrosal sinus, with special attention to the location of SPV, so that the normal flow of the SPV to the lateral sinus can be pre

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Gross, Bradley A., Daryoush Tavanaiepour, Rose Du, Ossama Al-Mefty, and Ian F. Dunn. "Evolution of the posterior petrosal approach." Neurosurgical Focus 33, no. 2 (2012): E7. http://dx.doi.org/10.3171/2012.6.focus12133.

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In this article, the authors review the history of the posterior petrosal approach. The early foundation of the retrolabyrinthine lateral petrosectomy has its roots in the otolaryngology literature. These early approaches were limited in exposure by the tentorium superiorly and the sigmoid sinus posteriorly. Although the concept of a transtentorial approach was originally combined with a complete labyrinthectomy, Hakuba and colleagues described the expansive exposure afforded by sectioning the tentorium and superior petrosal sinus and mobilizing a skeletonized sigmoid sinus. This maneuver serv

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Scott, Robert W., James Epperson, and Clayton H. Heathcock. "Total Synthesis of Petrosin, Petrosin A, and Petrosin B." Journal of Organic Chemistry 63, no. 15 (1998): 5001–12. http://dx.doi.org/10.1021/jo9801768.

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Castinetti, F., I. Morange, H. Dufour, et al. "Desmopressin test during petrosal sinus sampling: a valuable tool to discriminate pituitary or ectopic ACTH-dependent Cushing’s syndrome." European Journal of Endocrinology 157, no. 3 (2007): 271–77. http://dx.doi.org/10.1530/eje-07-0215.

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Corticotropin-releasing hormone (CRH)-stimulated petrosal sinus sampling is currently the gold standard method for the differential diagnosis between pituitary and ectopic ACTH-dependent Cushing’s syndrome. Our objective was to determine sensitivity and specificity of desmopressin test during petrosal sinus sampling. Patients and methods: Forty-three patients had petrosal sinus sampling because of the lack of visible adenoma on magnetic resonance imaging (MRI) and/or because of discordant cortisol response to high-dose dexamethasone suppression test. ACTH sampling was performed in an antecubit

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Hara, Tsuyoshi, Jun-ichiro Hamada, Yutaka Kai, and Yukitaka Ushio. "Surgical Transvenous Embolization of a Carotid-Cavernous Dural Fistula with Cortical Drainage via a Petrosal Vein: Two Technical Case Reports." Neurosurgery 50, no. 6 (2002): 1380–84. http://dx.doi.org/10.1097/00006123-200206000-00036.

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Abstract OBJECTIVE AND IMPORTANCE We present two interesting cases involving carotid-cavernous dural fistulae draining only or predominantly into the petrosal vein after previous incomplete, complicated, endovascular treatments. Transvenous embolization with Guglielmi detachable coils, via the petrosal vein, during surgical exposure completely obliterated the fistulae. CLINICAL PRESENTATION A 64-year-old man manifesting left ocular symptoms after incomplete embolization of a left carotid-cavernous dural fistula and a 56-year-old woman manifesting left hemiparesis after complicated embolization

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Gross, Bradley A., Daryoush Tavanaiepour, Rose Du, Ossama Al-Mefty, and Ian F. Dunn. "Petrosal approaches to posterior circulation aneurysms." Neurosurgical Focus 33, no. 2 (2012): E9. http://dx.doi.org/10.3171/2012.6.focus12131.

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Complex posterior circulation aneurysms are formidable lesions with an abysmal natural history. Their management continues to present a challenge to both endovascular and open microsurgical approaches. Affording an expansive, combined supra- and infratentorial exposure, the petrosal approaches are well suited for these challenging lesions when located along the basilar trunk or at a low-lying basilar apex. This report evaluates the evolution and application of petrosal approaches to these lesions. Excluding transsigmoid, infratentorial, or labyrinth-sacrificing approaches, the authors found 23

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Liu, James K., and Vincent N. Dodson. "Combined Petrosal Approach for Resection of Petroclival Meningioma with Endoscopic Assistance: Operative Video and Technical Nuances." Journal of Neurological Surgery Part B: Skull Base 80, S 03 (2019): S292—S293. http://dx.doi.org/10.1055/s-0039-1688487.

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Petroclival meningiomas are formidable lesions due to their deep location in the skull base and proximity to critical neurovascular structures. The combined petrosal approach, comprised of an anterior petrosectomy and posterior retrolabyrinthine petrosectomy, allows for both supra- and infratentorial exposure of the tumor in the petroclival region while potentially preserving hearing function (Fig. 1). In this operative video atlas manuscript, the authors demonstrate a step-by-step technique for microsurgical resection of a petroclival meningioma via the combined petrosal approach. The nuances

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Prasad, S., T. C. Lee, E. A. Chiocca, and J. P. Klein. "Superficial greater petrosal neuropathy." Neurology: Clinical Practice 4, no. 6 (2014): 505–7. http://dx.doi.org/10.1212/cpj.0000000000000066.

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Strauss, Christian, Mandana Neu, Barbara Bischoff, and Johann Romstöck. "Clinical and Neurophysiological Observations after Superior Petrosal Vein Obstruction during Surgery of the Cerebellopontine Angle: Case Report." Neurosurgery 48, no. 5 (2001): 1157–61. http://dx.doi.org/10.1097/00006123-200105000-00043.

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Abstract IMPORTANCE Preservation of venous drainage during surgery of the cerebellopontine angle has received little attention. CLINICAL PRESENTATION We describe changes in brainstem auditory evoked potentials after temporary obstruction of the superior petrosal vein during surgical resection of a small meningioma at the petrous apex via a standard suboccipital-lateral approach. Temporary clipping of the petrosal vein resulted in deterioration of the brainstem auditory evoked potentials. The tumor was removed with preservation of the superior petrosal vein. CONCLUSION A transient postoperative

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Castro-Afonso, Luís Henrique de, Felipe Padovani Trivelato, Marco Túlio Rezende, et al. "The routes for embolization of dural carotid cavernous fistulas when the endovascular approach is indicated as a first-line strategy." Interventional Neuroradiology 25, no. 1 (2018): 66–70. http://dx.doi.org/10.1177/1591019918796493.

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Introduction Multiple ways to access the dural carotid cavernous fistula have been described. The aim of the present study was to assess the results of embolization of a dural carotid cavernous fistula via different routes using endovascular accesses as a first-line strategy. Methods A retrospective data analysis of a consecutive series of 63 patients presenting with dural carotid cavernous fistula was performed. Results The dural carotid cavernous fistula was accessed by an endovascular approach in 58 patients (92.1%) and by direct puncture in five patients (7.9%). The inferior petrosal sinus

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Ladevèze, Sandrine. "Petrosal bones of metatherian mammals from the Late Palaeocene of Itaboraí (Brazil), and a cladistic analysis of petrosal features in metatherians." Zoological Journal of the Linnean Society 150, no. 1 (2007): 85–115. https://doi.org/10.1111/j.1096-3642.2007.00282.x.

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Ladevèze, Sandrine (2007): Petrosal bones of metatherian mammals from the Late Palaeocene of Itaboraí (Brazil), and a cladistic analysis of petrosal features in metatherians. Zoological Journal of the Linnean Society 150 (1): 85-115, DOI: 10.1111/j.1096-3642.2007.00282.x, URL: https://academic.oup.com/zoolinnean/article-lookup/doi/10.1111/j.1096-3642.2007.00282.x

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Li, T., X. Lv, and Z. Wu. "Endovascular Treatment of Hemifacial Spasm Associated with a Petrosal DAVF Using Transarterial Onyx Embolization." Interventional Neuroradiology 18, no. 1 (2012): 69–73. http://dx.doi.org/10.1177/159101991201800109.

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This paper reports that decompression of the facial nerve by transarterial Onyx embolization may relieve hemifacial spasm (HFS) caused by dilated veins due to a right petrosal dural arteriovenous fistula (DAVF). A 56-year-old man suffered severe chronic right HFS associated with a dilated right petrosal vein lying in the vicinity of the facial nerve. The right petrosal DAVF was reached through the middle meningeal artery using a transfemoral arterial approach and was occluded with Onyx 18 (M.T.I.- ev3, Irvine, CA, USA). There was complete remission of HFS without recurrence after two months of

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Vlasov, Sergey, Maria Harutyunova, Karine Harutyunova, and Peter Adler. "Chromosomal evidence of species status and evolutionary relationships of the black fly Prosimulium petrosum (Diptera, Simuliidae) in Armenia." Comparative Cytogenetics 10, no. (1) (2016): 33–44. https://doi.org/10.3897/CompCytogen.v10i1.6551.

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The karyotype of Armenian populations of the black fly Prosimulium petrosum Rubtsov, 1955 was characterized and compared with that of all other chromosomally known Palearctic members of the Prosimulium hirtipes group. Analysis of the polytene chromosomes established that Prosimulium petrosum is most closely related to European populations of Prosimulium latimucro (Enderlein, 1925) with which it shares an identical fixed chromosomal banding sequence. Its validity as a species, separate from Prosimulium latimucro, is based on its unique sex-differential sections in the expanded centromere region

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Bambakidis, Nicholas C., U. Kumar Kakarla, Louis J. Kim, et al. "Evolution of Surgical Approaches in the Treatment of Petroclival Meningiomas: A Retrospective Review." Operative Neurosurgery 61, suppl_5 (2007): ONS202—ONS211. http://dx.doi.org/10.1227/01.neu.0000303218.61230.39.

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Abstract Objective: We examined the surgical approaches used at a single institution to treat petroclival meningioma and evaluated changes in method utilization over time. Methods: Craniotomies performed to treat petroclival meningioma between September of 1994 and July of 2005 were examined retrospectively. We reviewed 46 patients (mean follow-up, 3.6 yr). Techniques included combined petrosal or transcochlear approaches (15% of patients), retrosigmoid craniotomies with or without some degree of petrosectomy (59% of patients), orbitozygomatic craniotomies (7% of patients), and combined orbito

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Schneiders, S. M. D., J. W. Rainsbury, E. F. Hensen, and R. M. Irving. "Superior petrosal sinus causing superior canal dehiscence syndrome." Journal of Laryngology & Otology 131, no. 7 (2017): 593–97. http://dx.doi.org/10.1017/s0022215117001013.

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AbstractObjective:To determine signs and symptoms for superior canal dehiscence syndrome caused by the superior petrosal sinus.Methods:A review of the English-language literature on PubMed and Embase databases was conducted, in addition to a multi-centre case series report.Results:The most common symptoms of 17 patients with superior petrosal sinus related superior canal dehiscence syndrome were: hearing loss (53 per cent), aural fullness (47 per cent), pulsatile tinnitus (41 per cent) and pressure-induced vertigo (41 per cent). The diagnosis was made by demonstration of the characteristic bon

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Almefty, Kaith K., and Ossama Al-Mefty. "Petrosal Approach With Preservation of the Superior Petrosal Sinus (the Graceful Petrosal) for Resection of Giant Trigeminal Schwannoma: 2-Dimensional Operative Video." Operative Neurosurgery 20, no. 5 (2021): E342—E343. http://dx.doi.org/10.1093/ons/opaa427.

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Abstract Trigeminal schwannomas are benign tumors amendable to curative surgical resection.1 Excellent outcomes, with preservation and improvement of cranial nerve function, including trigeminal nerve function, have been reported with microsurgical resection through skull base approaches.2 Dumbell shaped tumors, involving the middle and posterior fossa, are more challenging.3 They are resected via a middle cranial fossa approach with the expanded Meckel cave providing access to the posterior fossa. However, tumors with a large caudal extension below the internal auditory meatus typically canno

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Borba Moreira, Leandro, Ali Tayebi Meybodi, Xiaochun Zhao, Kaith K. Almefty, Michael T. Lawton, and Mark C. Preul. "Dissection of the Petrosal Presigmoid-Retrolabyrinthine Approach for the Petroclival Region on a Cadaver: 2-Dimensional Operative Video." Operative Neurosurgery 19, no. 4 (2020): E398—E399. http://dx.doi.org/10.1093/ons/opaa117.

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Abstract Skull base epidermoid tumors, meningiomas, and schwannomas can be accessed by different techniques depending on the location and size of the lesion. Small lesions located anterior to the internal acoustic meatus (IAM) can be accessed via the subtemporal approach, and lesions located posterior to the IAM can be approached via retrosigmoid craniotomy. However, expansive lesions that are located anterior to the IAM and extend posteriorly toward the lower clivus can be accessed via the petrosal approach. The petrosal approach (presigmoid-retrolabyrinthine) is centered on the petrous ridge

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Rudakov, I. A., A. V. Savello, V. Yu Cherebillo, et al. "Bilateral simultaneous sampling of the cavernous and inferior petrosal sinuses in the differential diagnosis of Cushing’s disease." Russian journal of neurosurgery 25, no. 4 (2024): 41–48. http://dx.doi.org/10.17650/1683-3295-2023-25-4-41-48.

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Background. Currently, the “gold standard” of differential diagnosis of Cushing’s disease is inferior petrosal sinus sampling and measurement of the adenocorticotropic hormone (ACTH) level. The studied literature data indicate a wide variability in the sensitivity and specificity of inferior petrosal sinus sampling in the range of 85–100 and 67–100 %, respectively, which can lead to an erroneous diagnosis of the source of ACTH hyperproduction and, as a consequence, to incorrect and untimely treatment.Aim.To improve the results of differential diagnosis of Cushing»s disease by using bilateral s

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Tabarin, Antoine, Jean-Benoît Corcuff, Michel Rashedi, et al. "Multihormonal response to corticotropin-releasing hormone in inferior petrosal sinus blood of one patient with Cushing's disease: comparison with in vitro secretion of the tumoral corticotropes." Acta Endocrinologica 127, no. 3 (1992): 284–88. http://dx.doi.org/10.1530/acta.0.1270284.

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A multihormonal response to CRH during inferior petrosal sinus sampling in patients with Cushing's disease has recently been described. Whether it reflects multihormonal secretion by the corticotropic adenoma, or secretion by non-tumorous adjacent cells via paracrine mechanisms remains debatable. We have compared the effect of CRH on ACTH, GH, PRL and TSH secretion during inferior petrosal sinus sampling with its effect on the in vitro secretion of the corticotropic adenoma after excision in one case of Cushing's disease. Before CRH injection in vivo results show significant central-peripheral

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Chen, J., L. He, B. Dinger, L. Stensaas, and S. Fidone. "Chronic hypoxia upregulates connexin43 expression in rat carotid body and petrosal ganglion." Journal of Applied Physiology 92, no. 4 (2002): 1480–86. http://dx.doi.org/10.1152/japplphysiol.00077.2001.

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Recent studies have demonstrated that oxygen-sensitive type I cells in the carotid body express the gap junction-forming protein connexin43 (Cx43). In the present study, we examined the hypothesis that chronic exposure to hypoxia increases Cx43 expression in type I cells as well as in chemoafferent neurons in the petrosal ganglion. Immunocytochemical studies in tissues from normal rats revealed diffuse and granular Cx43-like immunoreactivity in the cytoplasm of type I cells and dense punctate spots of immunoreactive product at the margins of type I cells and near the borders of chemosensory ce

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Sheahan, Patrick, and Rory McConn Walsh. "Supralabyrinthine approach to petrosal cholesteatoma." Journal of Laryngology & Otology 117, no. 7 (2003): 558–60. http://dx.doi.org/10.1258/002221503322113012.

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Petrosal cholesteatomas are rare lesions, which may be congenital or acquired in nature. We report an exceptional case occurring in a seven-year old girl who presented with a unilateral conductive hearing loss, despite normal tympanic membrane appearance. Early diagnosis was facilitated by computed tomography (CT) scanning. Although this case satisfied the criteria for congenital cholesteatoma, it is likely that the petrous apex was secondarily involved. Complete cholesteatoma removal was accomplished using a transtemporal supralabyrinthine approach, which allowed for hearing preservation, whi

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