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Relevant bibliographies by topics / Posterior Cranial fossa

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Academic literature on the topic 'Posterior Cranial fossa'

Author: Grafiati

Published: 4 June 2021

Last updated: 29 July 2024

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Journal articles on the topic "Posterior Cranial fossa"

1

Javalkar, Vijayakumar, Anirban Banerjee, and Anil Nanda. "Posterior Cranial Fossa Meningiomas." Journal of Neurological Surgery Part B: Skull Base 73, no. 01 (February 2012): 001–10. http://dx.doi.org/10.1055/s-0032-1304835.

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2

Javalkar, Vijayakumar, Anirban Banerjee, and Anil Nanda. "Posterior Cranial Fossa Meningiomas." Skull Base 21, S 02 (September 27, 2011): e12-e12. http://dx.doi.org/10.1055/s-0031-1287684.

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3

Safavi-Abbasi, Sam, Federico Di Rocco, Kraisri Chantra, Guenther Feigl, Amr El-Shawarby, Amir Samii, and Madjid Samii. "Posterior Cranial Fossa Gangliogliomas." Skull Base 17, no. 4 (July 2007): 253–64. http://dx.doi.org/10.1055/s-2007-984486.

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4

VURALLI, Duygu, and Mahmut OKSÜZLER. "Chiari malformasyonu Tip-I’de fossa cranii posterior morfometrisinin radyolojik olarak değerlendirilmesi." Cukurova Medical Journal 47, no. 3 (September 30, 2022): 1067–72. http://dx.doi.org/10.17826/cumj.1101474.

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Amaç:. Bu çalışmada, Chiari Malformasyonu Tip-I hastaları ve kontrol grubuna ait Manyetik Rezonans (MR) görüntülerinde fossa cranii posterior (FCP) ve cranium’ a ait morfometrik ölçümler yapılarak oluşan morfolojik değişiklikleri değerlendirmek amaçlandı. Gereç ve Yöntem: Çalışmamız retrospektif nitelikte olup çalışmaya 21 ve 47 yaş aralığında 32 kişilik kontrol grubu (16 kadın, 16 erkek) ve 12 kişilik CMI’ lı hasta grubu (6 erkek, 6 kadın) dahil edildi. CMI’ lı hasta ve kontrol grubuna ait T2 ağırlıklı MR görüntüleri üzerinde ölçümler yapıldı. Bulgular: Maksimum cranial uzunluk, maksimum cranial yükseklik, foramen magnum sagittal çapı, basis cranii uzunluğu, supraocciput uzunluğu, clivus uzunluğu, fossa cranii posterior’ un ön-arka çapı, occipital cord uzunluğu, cerebellum yüksekliği, herniasyon miktarı CMI’ lı hastalarda sırasıyla 164.13±10.67mm, 134.60 ±10.71 mm, 36.89±5.28 mm, 108.5±7.9 mm, 38.5±3.7 mm, 36.7±7.1 mm, 84.9±8.8 mm, 79.7±11.5 mm, 53.3±4.2 mm, 7.8±4.9 mm olarak ölçüldü. Sonuç: Sağlıklı bireylere ait değerlerle karşılaştırıldığında, CMI’lı hastalarda foramen magnum ön-arka çapında ve tonsiller herniasyonda artış; clivus uzunluğu, occipital cord uzunluğu ve supraocciput uzunluğunda azalma olduğu görüldü. CMI‘lı hastalara ait FCP morfometrisinin bilinmesinin hastaların takibine ve cerrahisine katkı sağlayacağı düşünüldü.

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Nishikawa, Misao, Hiroaki Sakamoto, Akira Hakuba, Naruhiko Nakanishi, and Yuichi Inoue. "Pathogenesis of Chiari malformation: a morphometric study of the posterior cranial fossa." Neurosurgical Focus 1, no. 5 (November 1996): E1. http://dx.doi.org/10.3171/foc.1996.1.5.1.

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To investigate overcrowding in the posterior cranial fossa as the pathogenesis of adult-type Chiari malformation, the authors studied the morphology of the brainstem and cerebellum within the posterior cranial fossa (neural structures consisting of the midbrain, pons, cerebellum, and medulla oblongata) as well as the base of the skull while taking into consideration their embryological development. Thirty patients with Chiari malformation and 50 normal control subjects were prospectively studied using neuroimaging. To estimate overcrowding, the authors used a "volume ratio" in which volume of the posterior fossa brain (consisting of the midbrain, pons, cerebellum, and medulla oblongata within the posterior cranial fossa) was placed in a ratio with the volume of the posterior fossa cranium encircled by bony and tentorial structures. Compared to the control group, in the Chiari group there was a significantly larger volume ratio, the two occipital enchondral parts (the exocciput and supraocciput) were significantly smaller, and the tentorium was pronouncedly steeper. There was no significant difference in the posterior fossa brain volume or in the axial lengths of the hindbrain (the brainstem and cerebellum). In six patients with basilar invagination the medulla oblongata was herniated, all three occipital enchondral parts (the basiocciput, exocciput, and supraocciput) were significantly smaller than in the control group, and the volume ratio was significantly larger than that in the Chiari group without basilar invagination. These results suggest that in adult-type Chiari malformation an underdeveloped occipital bone, possibly due to underdevelopment of the occipital somite originating from the paraxial mesoderm, induces overcrowding in the posterior cranial fossa, which contains the normally developed hindbrain. Basilar invagination is associated with a more severe downward herniation of the hindbrain due to the more severely underdeveloped occipital enchondrium, which further exacerbates overcrowding of the posterior cranial fossa.

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Nishikawa, Misao, Hiroaki Sakamoto, Akira Hakuba, Naruhiko Nakanishi, and Yuichi Inoue. "Pathogenesis of Chiari malformation: a morphometric study of the posterior cranial fossa." Journal of Neurosurgery 86, no. 1 (January 1997): 40–47. http://dx.doi.org/10.3171/jns.1997.86.1.0040.

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✓ To investigate overcrowding in the posterior cranial fossa as the pathogenesis of adult-type Chiari malformation, the authors studied the morphology of the brainstem and cerebellum within the posterior cranial fossa (neural structures consisting of the midbrain, pons, cerebellum, and medulla oblongata) as well as the base of the skull while taking into consideration their embryological development. Thirty patients with Chiari malformation and 50 normal control subjects were prospectively studied using neuroimaging. To estimate overcrowding, the authors used a “volume ratio” in which volume of the posterior fossa brain (consisting of the midbrain, pons, cerebellum, and medulla oblongata within the posterior cranial fossa) was placed in a ratio with the volume of the posterior fossa cranium encircled by bony and tentorial structures. Compared to the control group, in the Chiari group there was a significantly larger volume ratio, the two occipital enchondral parts (the exocciput and supraocciput) were significantly smaller, and the tentorium was pronouncedly steeper. There was no significant difference in the posterior fossa brain volume or in the axial lengths of the hindbrain (the brainstem and cerebellum). In six patients with basilar invagination the medulla oblongata was herniated, all three occipital enchondral parts (the basiocciput, exocciput, and supraocciput) were significantly smaller than in the control group, and the volume ratio was significantly larger than that in the Chiari group without basilar invagination. These results suggest that in adult-type Chiari malformation an underdeveloped occipital bone, possibly due to underdevelopment of the occipital somite originating from the paraxial mesoderm, induces overcrowding in the posterior cranial fossa, which contains the normally developed hindbrain. Basilar invagination is associated with a more severe downward herniation of the hindbrain due to the more severely underdeveloped occipital enchondrium, which further exacerbates overcrowding of the posterior cranial fossa.

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7

Kosharnyi, Volodymitr, Larisa Abdul-Ogly, Kateryna Kushnaryova, Viktoriya Rutgeiser, Hanna Kozlovska, and Oleksandr Rutgeiser. "PARAMETERS RELATIONSHIP OF THE FACIAL AND CEREBRAL PARTS OF THE SKULL AND THE POSTERIOR FOSSA." Clinical anatomy and operative surgery 21, no. 4 (November 24, 2022): 30–36. http://dx.doi.org/10.24061/1727-0847.21.4.2022.43.

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The purpose of the study was to determine the relationship between the parameters of the facial and brain bones of the skull and the structures of the posterior cranial fossa. The most important area of medical craniology remains the complex study of the typical variability of skull structures and formations and the regularity of their interrelationships in general. These include the posterior fossa with its brain regions and vascular communications. The morphology of the posterior fossa was studied on 13 passport turtles of adults from the collection of the fundamental museum of the Department of Clinical Anatomy, Anatomy and Operative Surgery of the Dnipro State Medical University. To solve the problems, a complex of craniometric methods was used. Craniometric studies of the posterior cranial fossa, the base of the skull, were performed with a thick compass with a millimetre scale and a technical calliper with a ﬁ ssion price of 0.01 mm, according to the standard craniology procedure. For statistical processing of data obtained as a result of craniometry the method of complex statistical analysis is applied, which includes modern methods of mathematical analysis: variation, correlation, factor and regression. Statistical analysis of the posterior fossa showed no signiﬁ cant gender and age diﬀ erences. The obtained data can be used both in theoretical medicine and in practical medicine, in particular in neurosurgery, to determine the volume of the posterior cranial fossa by the external size of the facial and cerebral regions of the skull. In our work, measurements were made of the skeletal structures of the posterior cranial fossa in the plane of the Frankfurt horizontal along the external dimensions of the facial and cerebral areas of the skull. The morphometric traits of «close» posterior cranial fossa (posterior cranial fossa) have been highlighted as increasing the ratio of the brain matter volume of the posterior cranial fossa to its bone volume. Craniometrically, the volume of the posterior cranial fossa has been determined to be between 110 and 218 cm3, averaging 158 cm3 with a statistical deviation of 19.14. The volume of the posterior cranial fossa in adults ranges from 140 to 230 cm3, with an average of 178 cm3. The posterior fossa volume of 178 cm3 is an indication of a «close» posterior cranial fossa. Studies of the correlation between the facial and posterior cranial lobes have shown that the posterior fossa correlates to varying degrees with individual facial size. As a result of research, V truncated cone, V ellipsoid and V cut of ball were determined. The V ellipsoid ranged from a minimum of 138,662 to a maximum of 225,688 cm3, V truncated cone from 111,562 to 169,455 cm3; the V cut of the ball from 83,694 to 192,06 cm3.

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8

Agrawal, Amit, and Anand Kakani. "Posterior cranial fossa depressed fracture." Asian Journal of Neurosurgery 12, no. 3 (2017): 582. http://dx.doi.org/10.4103/1793-5482.144211.

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9

Sen, Chandranath. "Commentary “Posterior Cranial Fossa Gangliogliomas”." Skull Base 17, no. 4 (July 2007): 263. http://dx.doi.org/10.1055/s-2007-984487.

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Lemole, G. "Commentary “Posterior Cranial Fossa Gangliogliomas”." Skull Base 17, no. 4 (July 2007): 263–64. http://dx.doi.org/10.1055/s-2007-984488.

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Dissertations / Theses on the topic "Posterior Cranial fossa"

1

Cornwell, Petrea Lee. "An examination of motor speech function in children treated for posterior fossa tumours /." [St. Lucia, Qld.], 2003. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe17284.pdf.

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VIDAL, Claudio Henrique Fernandes. "Tratamento cirurgico da malformação de Chiari do tipo I:importância da abertura do forame de Magendie e ressecção das tonsilas." Universidade Federal de Pernambuco, 2014. https://repositorio.ufpe.br/handle/123456789/17973.

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Submitted by Natalia de Souza Gonçalves (natalia.goncalves@ufpe.br) on 2016-10-10T12:57:26Z No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) CLAUDIO VIDAL - COLACAO.pdf: 6023190 bytes, checksum: d165c8659f0d2b209cb4a7a228a33bd7 (MD5)
Made available in DSpace on 2016-10-10T12:57:26Z (GMT). No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) CLAUDIO VIDAL - COLACAO.pdf: 6023190 bytes, checksum: d165c8659f0d2b209cb4a7a228a33bd7 (MD5) Previous issue date: 2014-06-13
A alta prevalência de malformação da junção crânio-vertebral (JCV) no Nordeste do Brasil é historicamente associada ao biótipo braquicefálico também comum nessa região. A ectopia tonsilar, marco anatomopatológico da Malformação de Chiari tipo I (MC I), pode ser entendida no contexto de uma desproporção vigente entre o continente (crânio) e seu conteúdo (tecido nervoso) resultante de uma fossa posterior de pequenas dimensões. A forma mais adequada de se tratar a MC I é um dos tópicos mais controversos da neurocirurgia. O presente estudo se propôs a avaliar duas técnicas cirúrgicas comumente empregadas no tratamento da MC I. Métodos: Foram avaliados 32 indivíduos, distribuídos em dois grupos. No Grupo 1, 16 pacientes foram submetidos apenas à descompressão ósteodural da JCV, sem manipulação da membrana aracnoide. No Grupo 2, 16 pacientes foram submetidos à: descompressão ósteodural associada à abertura e dissecção da membrana aracnoide, e redução das tonsilas por termocoagulação e/ou aspiração. A comparação entre os grupos se fundamentou na avaliação de parâmetros clínicos e de Cine Ressonância Magnética do fluxo liquórico, nos períodos que antecederam e sucederam o ato cirúrgico. Resultados: Ambas as técnicas foram equivalentes (p>0,05) em proporcionar melhoria neurológica dos pacientes no período pós-operatório, porém o Grupo 2 cursou com mais complicações pós-operatórias, sendo o risco relativo de 2,45 (I.C.-1,55 a 3,86) para eventos adversos. No que tange à restauração do fluxo liquórico pela JCV no período pósoperatório, a quantidade de LCR que passa pela JCV do Grupo 1 foi maior que no Grupo 2 (p<0,05). Conclusão: A descompressão ósteodural da JCV sem manipulação da aracnoide é a forma mais adequada de tratamento da MC I entre as duas técnicas analisadas
Abnormalities of the craniovertebral junction (CVJ) are highly prevalent in Northeast of Brazil, where it is linked to braquicefalic biotype, also common in this region. The ectopic tonsils are the main anatomopathological feature of the type 1 Chiari Malformation (CM 1) and derived from a small posterior fossa. The best way to treat the CM 1 is one of the most controversial topics in the neurosurgical field. The present study evaluated the two most applied techniques to treat CM 1, by means of clinical and radiological parameters. Methods: A total of 32 patients were evaluated. They were divided in two groups: Group 1 had 16 patients that were submitted to cranio-dural decompression of the CVJ; Group 2 also had 16 patients and in addition to cranio-dural decompression of the CVJ, they also had intra-arachnoid manipulation, including tonsils reductions. These groups were analyzed and compared in terms of neurological exam and cerebrospinal fluid flow imaging by using phase-contrast magnetic resonance technique, in two different times: pre and postoperative periods. Results: Both techniques were equivalents in terms of neurological improvement of the patients (p>0,05), but the Group 2 had more surgical complications, with relative risk for this kind of event, of 2,5. Whatever the cerebrospinal fluid flow at CVJ, the patients of the Group 1 achieved greater amount of flow than the Group 2 (p<0,05) in the postoperative period. Conclusion: The exclusive cranio-dural decompression of the CVJ for treatment of CM 1 had better general results when compared to the addition of intra-arachnoid manipulation to the procedure.

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Brock, Roger Schmidt. "Ultrassonografia intraoperatória para avaliação da necessidade de duroplastia no tratamento cirúrgico de doentes com malformação de Chiari tipo I." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/5/5138/tde-28072017-093016/.

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Objetivos: Malformação de Chiari do tipo I (MC-I) é a principal doença malformativa congênita da junção craniovertebral, manifestando-se com ampla variedade de sinais e sintomas neurológicos. A melhor técnica cirúrgica a ser empregada no tratamento dos pacientes com malformação de Chiari do tipo I é ainda controversa. A descompressão das estruturas da fossa craniana posterior com plástica de ampliação dural é considerada procedimento padrão. Embora efetiva e de baixa morbidade, a craniectomia occipital isolada, sem abertura e ampliação dural, implica maior taxa de recidiva dos sintomas. Métodos que selecionam os pacientes quanto a necessidade da duroplastia não foram estabelecidos. O presente trabalho avalia a eficácia da mensuração intraoperatória da velocidade do fluxo do líquido cefalorraquidiano através da ultrassonografia (USG) na seleção da técnica cirúrgica a ser utilizada. Métodos: Foram analisados de forma prospectiva 49 pacientes submetidos à cirurgia para MC-I. A indicação de craniectomia da fossa posterior associada ou não à plástica de ampliação da dura-máter baseou-se na velocidade do fluxo do líquido cefalorraquidiano, mensurada pela ultrassonografia intraoperatória. Dor cervical, cefaleia e qualidade de vida foram avaliadas antes e após o tratamento cirúrgico. Resultados: Dos 49 pacientes incluídos, 36 pacientes (73%) apresentavam fluxo do líquido cefalorraquidiano superior a 3 cm/s e não foram submetidos a duroplastia ampliadora. Nos 13 (27%) pacientes com fluxo inicial inferior a 3 cm/s, indicou-se craniectomia occipital com duroplastia de ampliação. Não houve diferença significativa entre os dois grupos com relação aos parâmetros estudados. Conclusão: A ultrassonografia intraoperatória com avaliação da dinâmica e velocidade do fluxo do líquido cefalorraquidiano da junção craniovertebral auxilia a indicação de duroplastia durante descompressão da fossa craniana posterior em pacientes adultos com MC-I
Objectives: Chiari malformation Type I (CM-I) is the main congenital malformation disease of the craniovertebral junction, and may be responsible for a variety of neurological symptoms. The ideal surgical technique used to treat patients with CM-I is still controversial. Invasive procedures that enters CSF space and are associated with dural repair, are considered the gold standard. Although effective and less morbidity, isolated bone decompression without dural opening, implies greater recurrence of symptoms. Objective parameters to select patients, who need or not to have a duroplasty performed, have not been established. Our study evaluates the efficacy of intra-operative CSF flow measurement through the use of ultrasonography (USG) as a determining parameter in the selection of these patients. Methods: We analyzed prospectively 49 posterior fossa surgeries for patients with CM-I. Patients underwent decompressive surgery with or without opening of the dura mater after conducting USG intra-operatively with measured flow rate, being adopted 3cm/s flow rate as a determining value. The quality of life before and after surgery and the improvement of neck pain and headache were the parameters evaluated. Results: Of the 49 patients enrolled, 36 patients (73%) had adequate CSF flow above 3 cm / s and have not undergone duroplasty. In 13 (27%) patients with initial flow < 3 cm / s an opening in dura mater was performed together with duroplasty. There was no significant difference between the two groups regarding the parameters studied. Conclusion: Intraoperative ultrasound with measurement of CSF flow, having a flow of 3 cm / s as cut-off, allows the proper selection of patients with CM-I that can have a less invasive surgery with bone decompression without duroplasty

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Contro, Elena <1979&gt. "Il ruolo dell’ecografia prenatale nella diagnosi precoce delle anomalie fetali della fossa cranica posteriore." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amsdottorato.unibo.it/5905/1/contro_elena_tesi.pdf.

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Obiettivo: Valutare il ruolo brainstem-vermis angle (BV angle) a 16-18 settimane per la diagnosi precoce delle anomalie cistiche della fossa cranica posteriore. Metodi: Uno studio prospettico, multicentrico, osservazionale. Volumi ecografici tridimensionali della testa fetale sono stati acquisiti in feti a 16-18 settimane. Tre operatori di simile esperienza hanno misurato il BV angle nel piano sagittale come precedentemente descritto1,2 e hanno annotato se il quarto ventricolo era aperto sul piano assiale. Un follow-up dettagliato è stato ottenuto in tutti i casi. Risultati: Tra novembre 2009 e marzo 2011, 150 volumi sono stati acquisiti ad un’epoca gestazionale media di 16 settimane. A causa di una scarsa qualità delle immaginai, 49 volumi sono stati esclusi, con una popolazione finale di 101 casi. Di questi, 6 hanno ricevuto successivamente una diagnosi di malformazione di Dandy-Walker (DWM) e 2 di cisti della tasca di Blake (BPC), gli altri erano normali. In tutti i feti con anomalie cistiche della fossa cranica posteriore, il BV angle è risultato significativamente più ampio rispetto ai controlli (57.3+23.0° vs 9.4+7.7°, U-Mann Whitney test p<0.000005). Nel 90.3% dei feti normali, il BV angle era <20° e il quarto ventricolo era chiuso sul piano assiale. In 9 feti normali e nei casi con BPC, l’angolo era >20° ma <45° (25.8+5.6°) e il quarto ventricolo era aperto posteriormente sul piano assiale, ma solo utilizzando una scansione non convenzionale. In tutti i feti con DWM, il BV angle era >45° (67.9+13.9°) e il quarto ventricolo era aperto anche sul piano assiale standard. Conclusioni: Fino ad ora la diagnosi di anomalie cistiche della fossa cranica posteriore è stata consideratea difficile o impossibile prima di 20 settimane, a causa del presunto sviluppo tardivo del verme cerebellare. La nostra esperienza suggerisce che la misurazione del BV angle consente un’identificazione precisa di queste condizioni già a 16 settimane.
Objective: To evaluate the role of the brainstem-vermis angle (BV angle) at 16-18 weeks in the early diagnosis of fetal posterior fossa abnormalities. Methods: A prospective multicenter observational study. Three-dimensional ultrasound volumes of the head were acquired in fetuses at 16-18 weeks. Three experienced operators measured the BV angle in the sagittal plane as previously described1,2 and noted whether the 4th ventricle was open in the axial view. A detailed follow-up was provided in each case. Results: Between November 2009 and March 2011, 150 volumes were acquired at 16 wks mean gestational age. Due to low-quality images, 49 cases were excluded, leading to a study population of 101 cases. Of these, 6 were diagnosed with Dandy-Walker malformation (DWM) and 2 with Blake’s pouch cyst (BPC) in later gestation, the remaining were normal. Postnatal follow-up confirmed the diagnosis in all cases. In all fetuses with posterior fossa anomalies, the BV angle was significantly increased compared to controls (57.3+23.0° vs 9.4+7.7°, U-Mann Whitney test p<0.000005). In 90.3% of normal fetuses the BV angle was <20° and the 4th ventricle was closed in axial planes. In 9 normal fetuses and in all cases with BPC the angle was >20° but <45° (25.8+5.6°), and a posterior opening of the 4th ventricle could not be demonstrated in the standard transcerebellar view, but only using a steeper angulation of the transducer. In all fetuses with DWM the BV angle was >45° (67.9+13.9°) and the 4th ventricle appeared widely open even in the standard transcerebellar view (figure 2). Conclusion: Thus far, the diagnosis of cystic posterior fossa anomalies has been considered difficult or impossible prior to 20 wks, owing to the late development of the cerebellar vermis. Our experience suggest that measurement of the BV angle allows precise identification of this conditions at 16 wks.

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5

Contro, Elena <1979&gt. "Il ruolo dell’ecografia prenatale nella diagnosi precoce delle anomalie fetali della fossa cranica posteriore." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amsdottorato.unibo.it/5905/.

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Abstract:

Obiettivo: Valutare il ruolo brainstem-vermis angle (BV angle) a 16-18 settimane per la diagnosi precoce delle anomalie cistiche della fossa cranica posteriore. Metodi: Uno studio prospettico, multicentrico, osservazionale. Volumi ecografici tridimensionali della testa fetale sono stati acquisiti in feti a 16-18 settimane. Tre operatori di simile esperienza hanno misurato il BV angle nel piano sagittale come precedentemente descritto1,2 e hanno annotato se il quarto ventricolo era aperto sul piano assiale. Un follow-up dettagliato è stato ottenuto in tutti i casi. Risultati: Tra novembre 2009 e marzo 2011, 150 volumi sono stati acquisiti ad un’epoca gestazionale media di 16 settimane. A causa di una scarsa qualità delle immaginai, 49 volumi sono stati esclusi, con una popolazione finale di 101 casi. Di questi, 6 hanno ricevuto successivamente una diagnosi di malformazione di Dandy-Walker (DWM) e 2 di cisti della tasca di Blake (BPC), gli altri erano normali. In tutti i feti con anomalie cistiche della fossa cranica posteriore, il BV angle è risultato significativamente più ampio rispetto ai controlli (57.3+23.0° vs 9.4+7.7°, U-Mann Whitney test p<0.000005). Nel 90.3% dei feti normali, il BV angle era <20° e il quarto ventricolo era chiuso sul piano assiale. In 9 feti normali e nei casi con BPC, l’angolo era >20° ma <45° (25.8+5.6°) e il quarto ventricolo era aperto posteriormente sul piano assiale, ma solo utilizzando una scansione non convenzionale. In tutti i feti con DWM, il BV angle era >45° (67.9+13.9°) e il quarto ventricolo era aperto anche sul piano assiale standard. Conclusioni: Fino ad ora la diagnosi di anomalie cistiche della fossa cranica posteriore è stata consideratea difficile o impossibile prima di 20 settimane, a causa del presunto sviluppo tardivo del verme cerebellare. La nostra esperienza suggerisce che la misurazione del BV angle consente un’identificazione precisa di queste condizioni già a 16 settimane.
Objective: To evaluate the role of the brainstem-vermis angle (BV angle) at 16-18 weeks in the early diagnosis of fetal posterior fossa abnormalities. Methods: A prospective multicenter observational study. Three-dimensional ultrasound volumes of the head were acquired in fetuses at 16-18 weeks. Three experienced operators measured the BV angle in the sagittal plane as previously described1,2 and noted whether the 4th ventricle was open in the axial view. A detailed follow-up was provided in each case. Results: Between November 2009 and March 2011, 150 volumes were acquired at 16 wks mean gestational age. Due to low-quality images, 49 cases were excluded, leading to a study population of 101 cases. Of these, 6 were diagnosed with Dandy-Walker malformation (DWM) and 2 with Blake’s pouch cyst (BPC) in later gestation, the remaining were normal. Postnatal follow-up confirmed the diagnosis in all cases. In all fetuses with posterior fossa anomalies, the BV angle was significantly increased compared to controls (57.3+23.0° vs 9.4+7.7°, U-Mann Whitney test p<0.000005). In 90.3% of normal fetuses the BV angle was <20° and the 4th ventricle was closed in axial planes. In 9 normal fetuses and in all cases with BPC the angle was >20° but <45° (25.8+5.6°), and a posterior opening of the 4th ventricle could not be demonstrated in the standard transcerebellar view, but only using a steeper angulation of the transducer. In all fetuses with DWM the BV angle was >45° (67.9+13.9°) and the 4th ventricle appeared widely open even in the standard transcerebellar view (figure 2). Conclusion: Thus far, the diagnosis of cystic posterior fossa anomalies has been considered difficult or impossible prior to 20 wks, owing to the late development of the cerebellar vermis. Our experience suggest that measurement of the BV angle allows precise identification of this conditions at 16 wks.

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Books on the topic "Posterior Cranial fossa"

1

Berkovitz, B. K. B. A colour atlas of the skull. [London]: Wolfe Medical Publications, 1989.

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Berkovitz, B. K. B. A colour atlas of the skull. London: Wolfe Medical Publications Ltd., 1989.

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Matsushima, Toshio. Microsurgical Anatomy and Surgery of the Posterior Cranial Fossa. Tokyo: Springer Japan, 2015. http://dx.doi.org/10.1007/978-4-431-54183-7.

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Rhoton, Albert L. Cranial anatomy and surgical approaches. Baltimore, Md: Lippincott Williams & Wilkins, 2003.

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1946-, Cohen Alan, ed. Surgical disorders of the fourth ventricle. Cambridge, Mass., USA: Blackwell Science, 1996.

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Principles of posterior fossa surgery: Surgical management. New York: Thieme, 2011.

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Hillen, B. Elsevier's Interactive Anatomy: Temporal Bone & Posterior Cranial Fossa. Elsevier, 1994.

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Langdon, John, Bernard J. Moxham, and Barry Berkovitz. Surgical Anatomy of the Infratemporal Fossa. Taylor & Francis Group, 2002.

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(Editor), John D. Langdon, Barry K.B. Berkovitz (Editor), and Bernard J. Moxham (Editor), eds. Surgical Management of the Infratemporal Fossa. Informa Healthcare, 2002.

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Bradley, W., B. Flannigna, and W. Rauschning. Mri of the Posterior Cranial Fossa: Functional Anatomy and Pathology. Slack Inc, 1987.

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Book chapters on the topic "Posterior Cranial fossa"

1

Bradač, Gianni Boris, Ron Ferszt, and Brian E. Kendall. "Meningiomas of the Posterior Fossa." In Cranial Meningiomas, 100–111. Berlin, Heidelberg: Springer Berlin Heidelberg, 1990. http://dx.doi.org/10.1007/978-3-642-72581-4_11.

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Abdelaziz, Osama S., and Antonio A. F. De Salles. "Posterior Cranial Fossa Meningioma." In NeuroRadiosurgery: Case Review Atlas, 343–57. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-16199-5_29.

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Paladini, Dario, and Paolo Volpe. "Posterior Cranial Fossa Cystic Malformations." In Ultrasound of Congenital Fetal Anomalies, 82–89. 3rd ed. Boca Raton: CRC Press, 2024. http://dx.doi.org/10.1201/9781003048268-10.

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Şeker, Aşkın, and Albert L. Rhoton. "The Anatomy of the Posterior Cranial Fossa." In Posterior Fossa Tumors in Children, 75–99. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-11274-9_3.

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Winston, Ken Rose. "Approaches to the Posterior Cranial Fossa." In Plastic Neurosurgery, 377–91. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-27872-3_13.

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Paladini, Dario, and Paolo Volpe. "Posterior Cranial Fossa Non-Cystic Malformations." In Ultrasound of Congenital Fetal Anomalies, 90–102. 3rd ed. Boca Raton: CRC Press, 2024. http://dx.doi.org/10.1201/9781003048268-11.

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Fortuna, Aldo. "Early Diagnosis of Posterior Cranial Fossa Tumors." In Early Diagnosis in Neuro-oncology, 27–31. Milano: Springer Milan, 2002. http://dx.doi.org/10.1007/978-88-470-2210-2_3.

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Matsushima, Toshio. "The Veins of the Posterior Cranial Fossa: Nomenclature." In Microsurgical Anatomy and Surgery of the Posterior Cranial Fossa, 33–40. Tokyo: Springer Japan, 2014. http://dx.doi.org/10.1007/978-4-431-54183-7_4.

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Matsushima, Toshio. "The Bridging Veins in the Posterior Cranial Fossa." In Microsurgical Anatomy and Surgery of the Posterior Cranial Fossa, 41–55. Tokyo: Springer Japan, 2014. http://dx.doi.org/10.1007/978-4-431-54183-7_5.

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Matsushima, Toshio. "Posterior and Anterior Transpetrosal Approaches." In Microsurgical Anatomy and Surgery of the Posterior Cranial Fossa, 261–76. Tokyo: Springer Japan, 2014. http://dx.doi.org/10.1007/978-4-431-54183-7_19.

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Conference papers on the topic "Posterior Cranial fossa"

1

Feiz-Erfan, Iman, Michael A. Foster, Michael R. Collins, Thomas M. Wertin, Adrienne R. Azurdia, and Salvatore C. Lettieri. "Management of Epidural Hematomas of the Posterior Cranial Fossa." In 31st Annual Meeting North American Skull Base Society. Georg Thieme Verlag KG, 2022. http://dx.doi.org/10.1055/s-0042-1743933.

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Shaffer, Nicholas, George Poppe, Francis Loth, Oliver Wieben, Victor Haughton, and Bermans Iskandar. "A Computational Study of Unsteady Resistance to Cerebrospinal Fluid Flow in Type I Chiari Malformation." In ASME 2010 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2010. http://dx.doi.org/10.1115/sbc2010-19642.

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Type I Chiari malformation (CM) is a complex disorder of the craniospinal system characterized by underdevelopment of the posterior cranial fossa and overcrowding of the normally developed hindbrain [1], and may be a precursor to more severe secondary disorders such as syringomyelia and hydrocephalus. Diagnosis of CM has proven to be difficult and may often take years to properly identify, as associated neurological symptoms may vary widely and overlap with symptoms of other disorders. Current methods of quantifying the severity of CM, such as radiographical measurement of the depth of hindbrain herniation into the spinal canal or measurement of posterior cranial fossa volume do not necessarily correlate to the symptom severity. Hence, there exists a need for a quantitative diagnostic method which may better characterize the severity of CM and, potentially, help neurosurgeons determine candidates for surgical treatment.

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Cordeiro, Júlia Coutinho, and José Gilberto de Brito Henriques. "Hemifacial spasm caused by posterior fossa arachnoid cyst: Case Report." In XIII Congresso Paulista de Neurologia. Zeppelini Editorial e Comunicação, 2021. http://dx.doi.org/10.5327/1516-3180.134.

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Context: Hemifacial spasm (HFS) is characterized by continuous or intermittent spasmodic movements at the facial nerve motor territory.1,2,3 It mainly affects middle- aged adults and usually occurs by compression of the facial nerve by anomalous vascular loops of the anteroinferior and vertebral cerebellar artery.2,3,4,5 The arachnoid cyst at the cerebellopontine angle (CPA) is an rare cause of HFS, especially in children. Case report: A six-year-old female patient started presenting at 18 months HFS on the right side. She was initially treated with anticonvulsant without improvement. The patient came to our care at the age of six presenting 2-3 HFS per day and remissions lasting 3-4 weeks. Image exams reveled a CPA arachnoid cyst compressing the VII and VIII nerves complex. Surgical drainage of the cyst was performed as the treatment of choice. In postoperative period, the patient presented remission of HFS, and cranial tomography showed a decrease in cyst volume. In three months, there was remission of the signs without use of any medications. Conclusions: There was no report of arachnoid cyst in CPA as a cause of HFS in children. HFS occurs probably by chronic irritation, since birth, because of the contact of arachnoid cyst in the emergence of the VII and VIII nerves complex in the PCA. Therefore, treatment was chosen according to the cause of HFS. Movement disorder as a clinical manifestation of the cyst is rare, especially in pediatric population, and should be considered as one of the diagnostic hypotheses.

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Jackson, Neal M., and Jerome Volk. "Cystic Fibrous Dysplasia of the Pediatric Temporal Bone: A Rare, Insidious Cause of Middle and Posterior Cranial Fossa Defects." In 31st Annual Meeting North American Skull Base Society. Georg Thieme Verlag KG, 2022. http://dx.doi.org/10.1055/s-0042-1743945.

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Dorantes-Argandar, Agustin, Flavio Rodas-Berrezueta, Luis Perez-Garcia, Alejandro Gonzalez-Sanchez, and Berenice Garcia-Guzman. "Precise Identification of Key Anatomical Structures for the Extended Endoscopic Endonasal Skull Base Surgical Approach to the Midline Posterior Cranial Fossa: Anatomical Study." In 32nd Annual Meeting North American Skull Base Society. Georg Thieme Verlag KG, 2023. http://dx.doi.org/10.1055/s-0043-1762223.

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