The Experts below are selected from a list of 261 Experts worldwide ranked by ideXlab platform
Takanori Hayakawa - One of the best experts on this subject based on the ideXlab platform.
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Traumatic hematoma of the Posterior Fossa
Acta neurochirurgica. Supplement, 2013Co-Authors: Satoru Takeuchi, Kojiro Wada, Yoshio Takasato, Hiroyuki Masaoka, Takanori Hayakawa, Hiroshi Yatsushige, Keigo Shigeta, Toshiya Momose, Naoki Otani, Hiroshi NawashiroAbstract:Posterior Fossa injury is rare, occurring in less than 3 % of head injuries. We retrospectively reviewed patients’ clinical and radiological findings, management, and outcomes. The aim of the present study was to investigate the features of Posterior Fossa hematoma, including Posterior Fossa epidural hematoma (EDH), Posterior Fossa subdural hematoma (SDH), and intracerebellar hematoma. From January 1995 to January 2009, 4,315 patients with head trauma were hospitalized at our institution. The present study focused on 41 patients (1.0 %) with traumatic hematomas of the Posterior Fossa. Eighteen patients had EDH, 10 patients had SDH, and 17 patients had intracerebellar hematomas. In each type of injury, occipital bone fractures were seen in many patients, and hematoma enlargement was often observed within a few days of the injury. In addition, a high frequency of associated lesions and a high poor outcome rate were features of intracerebellar hematomas and Posterior Fossa SDH. The present study suggests that repeat CT imaging and careful management are necessary until the lesion is stabilized, and patients showing lesions with mass effects should therefore be immediately treated with surgery.
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Traumatic Posterior Fossa subdural hematomas.
The journal of trauma and acute care surgery, 2012Co-Authors: Satoru Takeuchi, Kojiro Wada, Yoshio Takasato, Hiroyuki Masaoka, Naoki Otani, Hiroshi Nawashiro, Takanori HayakawaAbstract:BACKGROUND: Traumatic hematomas in the Posterior Fossa are rare, especially traumatic Posterior Fossa subdural hematomas (SDHs), which account for
William T. Couldwell - One of the best experts on this subject based on the ideXlab platform.
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Posterior Fossa brain tumors and arterial hypertension.
Neurosurgical review, 2006Co-Authors: Peter Kan, William T. CouldwellAbstract:Hypertension caused by arterial compression of the rostral ventrolateral medulla is well described. Much less information is available on the association between neurogenic hypertension and Posterior Fossa brain tumors. To date, multiple reports have supported the impression that a small subpopulation of patients with Posterior Fossa tumors can present with arterial hypertension, and many of those patients achieved significant improvement of their hypertension after tumor resection and medullary decompression. To review the relationship between Posterior Fossa brain tumors and hypertension, we detail the history, basic science, and clinical reports along with an illustrative case regarding this topic.
Michael D. Taylor - One of the best experts on this subject based on the ideXlab platform.
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Treatment implications of Posterior Fossa ependymoma subgroups
Chinese journal of cancer, 2016Co-Authors: Vijay Ramaswamy, Michael D. TaylorAbstract:Posterior Fossa ependymoma comprises two distinct molecular entities, ependymoma_Posterior Fossa A (EPN_PFA) and ependymoma_Posterior Fossa B (EPN_PFB), with differentiable gene expression profiles. As yet, the response of the two entities to treatment is unclear. To determine the relationship between the two molecular subgroups of Posterior Fossa ependymoma and treatment, we studied a cohort of 820 patients with molecularly profiled, clinically annotated Posterior Fossa ependymomas. We found that the strongest predictor of poor outcome in patients with Posterior Fossa ependymoma across the entire age spectrum was molecular subgroup EPN_PFA, which was recently reported in the paper entitled “Therapeutic impact of cytoreductive surgery and irradiation of Posterior Fossa ependymoma in the molecular era: a retrospective multicohort analysis” in the Journal of Clinical Oncology. Patients with incompletely resected EPN_PFA tumors had a very poor outcome despite receiving adjuvant radiation therapy, whereas a substantial proportion of patients with EPN_PFB tumors can be cured with surgery alone.
Satoru Takeuchi - One of the best experts on this subject based on the ideXlab platform.
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Traumatic hematoma of the Posterior Fossa
Acta neurochirurgica. Supplement, 2013Co-Authors: Satoru Takeuchi, Kojiro Wada, Yoshio Takasato, Hiroyuki Masaoka, Takanori Hayakawa, Hiroshi Yatsushige, Keigo Shigeta, Toshiya Momose, Naoki Otani, Hiroshi NawashiroAbstract:Posterior Fossa injury is rare, occurring in less than 3 % of head injuries. We retrospectively reviewed patients’ clinical and radiological findings, management, and outcomes. The aim of the present study was to investigate the features of Posterior Fossa hematoma, including Posterior Fossa epidural hematoma (EDH), Posterior Fossa subdural hematoma (SDH), and intracerebellar hematoma. From January 1995 to January 2009, 4,315 patients with head trauma were hospitalized at our institution. The present study focused on 41 patients (1.0 %) with traumatic hematomas of the Posterior Fossa. Eighteen patients had EDH, 10 patients had SDH, and 17 patients had intracerebellar hematomas. In each type of injury, occipital bone fractures were seen in many patients, and hematoma enlargement was often observed within a few days of the injury. In addition, a high frequency of associated lesions and a high poor outcome rate were features of intracerebellar hematomas and Posterior Fossa SDH. The present study suggests that repeat CT imaging and careful management are necessary until the lesion is stabilized, and patients showing lesions with mass effects should therefore be immediately treated with surgery.
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Traumatic Posterior Fossa subdural hematomas.
The journal of trauma and acute care surgery, 2012Co-Authors: Satoru Takeuchi, Kojiro Wada, Yoshio Takasato, Hiroyuki Masaoka, Naoki Otani, Hiroshi Nawashiro, Takanori HayakawaAbstract:BACKGROUND: Traumatic hematomas in the Posterior Fossa are rare, especially traumatic Posterior Fossa subdural hematomas (SDHs), which account for
Sarah Verheyen - One of the best experts on this subject based on the ideXlab platform.
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The Fetal Posterior Fossa on Prenatal Ultrasound Imaging: Normal Longitudinal Development and Posterior Fossa Anomalies.
Ultraschall in der Medizin (Stuttgart Germany : 1980), 2019Co-Authors: Barbara Pertl, Sophie Eder, Christina Stern, Sarah VerheyenAbstract:Fetal neurosonography and the assessment of the Posterior Fossa have gained in importance during the last 2 decades primarily due to the development of high-resolution ultrasound probes and the introduction of 3 D sonography. The anatomical development of the Posterior Fossa can be visualized well with the newest ultrasound technologies. This allows better knowledge of the anatomical structures and helps with understanding of the development of malformations of the Posterior Fossa. In this article the longitudinal development of the Posterior Fossa structures will be reviewed. The embryologic description will be compared with ultrasound descriptions. These embryologic and anatomic illustrations form the basis for the screening and diagnosis of malformations of the Posterior Fossa. During the first trimester, screening for open spina bifida as well as cystic malformations of the Posterior Fossa is possible. In the second and third trimester, malformations of the Posterior Fossa can be subdivided into 3 groups: fluid accumulation in the Posterior Fossa (Dandy-Walker malformation, Blake's pouch cyst, mega cisterna magna, arachnoid cyst, vermian hypoplasia), decreased cerebellar biometrics (volume) (cerebellar hypoplasia, pontocerebellar hypoplasia) and suspicious cerebellar anatomy (Arnold-Chiari malformation, rhombencephalosynapsis, Joubert syndrome). This algorithm, in combination with knowledge of normal development, facilitates the diagnostic workup of malformations of the Posterior Fossa.
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The Fetal Posterior Fossa on Prenatal Ultrasound Imaging: Normal Longitudinal Development and Posterior Fossa Anomalies.
Ultraschall in Der Medizin, 2019Co-Authors: Barbara Pertl, Sophie Eder, Christina Stern, Sarah VerheyenAbstract:Fetal neurosonography and the assessment of the Posterior Fossa have gained in importance during the last 2 decades primarily due to the development of high-resolution ultrasound probes and the introduction of 3 D sonography. The anatomical development of the Posterior Fossa can be visualized well with the newest ultrasound technologies. This allows better knowledge of the anatomical structures and helps with understanding of the development of malformations of the Posterior Fossa. In this article the longitudinal development of the Posterior Fossa structures will be reviewed. The embryologic description will be compared with ultrasound descriptions. These embryologic and anatomic illustrations form the basis for the screening and diagnosis of malformations of the Posterior Fossa. During the first trimester, screening for open spina bifida as well as cystic malformations of the Posterior Fossa is possible. In the second and third trimester, malformations of the Posterior Fossa can be subdivided into 3 groups: fluid accumulation in the Posterior Fossa (Dandy-Walker malformation, Blake’s pouch cyst, mega cisterna magna, arachnoid cyst, vermian hypoplasia), decreased cerebellar biometrics (volume) (cerebellar hypoplasia, pontocerebellar hypoplasia) and suspicious cerebellar anatomy (Arnold-Chiari malformation, rhombencephalosynapsis, Joubert syndrome). This algorithm, in combination with knowledge of normal development, facilitates the diagnostic workup of malformations of the Posterior Fossa. Die fetale Neurosonografie und damit auch die sonografische Beurteilung der Strukturen der Fossa Posterior haben in den letzten beiden Jahrzehnten durch den Einsatz hochauflosender Ultraschallsonden und des 3D-Ultraschalls eine besondere Bedeutung erlangt. Durch die neuen Ultraschalltechnologien kann die embryologische Entwicklung der Fossa-Posterior-Strukturen nachvollzogen werden. Dies erleichtert die Kenntnis der anatomischen Strukturen und tragt zum Verstandnis fur die Entstehung von Fehlbildungen der Fossa Posterior bei. In der folgenden Ubersichtsarbeit wird die longitudinale Entwicklung der Fossa-Posterior-Strukturen dargestellt. Dabei wird die embryologische Beschreibung mit der Darstellung im Ultraschall verglichen. Dieses embryologische und anatomische Wissen bildet die Grundlage fur das Screening und die Diagnose von Veranderungen und Fehlbildungen der Fossa Posterior. Im Ersttrimester ist ein Screening fur Spina bifida aperta und zystische Fehlbildungen der Fossa Posterior moglich. Im 2. und 3. Trimester konnen die Fehlbildungen der Fossa Posterior in 3 Kategorien unterteilt werden: Fehlbildungen mit vermehrter Flussigkeit in der Fossa Posterior (Dandy-Walker-Malformation, Blakes-pouch-Zyste, Megacisterna magna, Arachnoidalzyste, Vermishypoplasie), Fehlbildungen mit verminderter Biometrie bzw. vermindertem Volumen bei „uberwiegend“ normaler Anatomie des Zerebellums (zerebellare Hypoplasie, pontozerebellare Hypoplasie) und Fehlbildungen mit strukturell verandertem Zerebellum (Arnold-Chiari-Malformation, Rhombenzephalosynapsis, Joubert-Syndrom). Dieser Algorithmus und das Verstandnis der normalen Entwicklung ermoglichen ein systematisches Aufarbeiten der Fehlbildungen der Fossa Posterior.
