Supracerebellar arachnoid cyst and reversible tonsillar herniation: magnetic resonance imaging and pathophysiological considerations

Floris, R; Pastore, Francesco Saverio; Silvestrini, Mauro; Vagnozzi, Roberto; Guazzaroni, M; Giuffrè, R; Simonetti, G

doi:10.1007/bf00596501

Cited by 9 publications

(6 citation statements)

References 15 publications

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“…Arachnoid cysts are predominantly located in the sylvian fissure. [18,51,139] However, cysts in any other location, such as the anterior [7] and posterior cranial fossa, [31,58,78] quadrigeminal cistern, [49,100,127] interhemispheric fissure, [51] suprasellar region, [56,103] or intraventricular space, [72,83,138] are suitable for an endoscopic approach.…”

Section: Arachnoid Cystsmentioning

confidence: 99%

Intracranial endoscopy

Schroeder¹,

Gaab²

1999

FOC

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The authors' intention is to reduce the invasiveness of intracranial procedures while avoiding traumatization of brain tissue, to decrease the risk of neurological and mental deficits. Intracranial endoscopy is a minimally invasive technique that provides rapid access to the target via small burr holes without the need for brain retraction. Craniotomy as well as microsurgical brain splitting and dissection can often be avoided. Furthermore, because obstructed cerebrospinal fluid pathways can be physiologically restored, the need for shunt placement is eliminated. The ventricular system and subarachnoid spaces provide ideal conditions for the use of an endoscope. Therefore, a variety of disorders, such as hydrocephalus, small intraventricular lesions, and arachnoid and parenchymal cysts can be effectively treated using endoscopic techniques. With the aid of special instruments, laser fibers, and bipolar diathermy, even highly vascularized lesions such as cavernomas may be treated. Moreover, during standard microsurgical procedures, the endoscopic view may provide valuable additional information ("looking around a corner") about the individual anatomy that is not visible with the microscope. In transsphenoidal pituitary surgery, transseptal dissection can be avoided if an endonasal approach is taken. In the depth of the intrasellar space, the extent of tumor removal can be more accurately controlled, especially in larger tumors with para- and suprasellar growth. The combined use of endoscopes and computerized neuronavigation systems increases the accuracy of the approach and provides real-time control of the endoscope tip position and approach trajectory. In the future, the indications for neuroendoscopy will certainly expand with improved technical equipment.

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Section: Arachnoid Cystsmentioning

confidence: 99%

Intracranial endoscopy

Schroeder¹,

Gaab²

1999

FOC

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“…Cerebellar tonsil herniation can be a catastrophic outcome of mass effect in the cranium. Both supratentorial and infratentorial lesions can result in cerebellar tonsil herniation (Floris et al, 1992; Onesti et al, 1997; Sheehan & Jane Sr, 2000). We aimed to model and quantify the effect of a supratentorial mass on the position of the cerebellar tonsils in cadaveric specimens.…”

Section: Discussionmentioning

confidence: 99%

“…Using this model, for every 1 mmHg increase in ICP, the cerebellar tonsils descended by approximately 0.3 mm. can result in cerebellar tonsil herniation (Floris et al, 1992;Onesti et al, 1997;Sheehan & Jane Sr, 2000). We aimed to model and quantify the effect of a supratentorial mass on the position of the cerebellar tonsils in cadaveric specimens.…”

Section: Tonsillar Herniation With Icp Changes Following Balloon Infl...mentioning

confidence: 99%

An anatomical model for studying cerebellar tonsillar herniation related to raised intracranial pressure

et al. 2021

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Brain herniation is one of the most feared complications of many neurological pathologies. However, current understanding of the mechanisms behind brain herniation syndromes is poor. By investigating the correlations between raised intracranial pressure (ICP) and herniation of the cerebellar tonsils, we hope to develop a model that can be used to study intracranial fluid dynamics and its effects on brain tissue. This will facilitate evaluation of patients with elevated ICP and development of novel treatments including surgical approaches for decompressing the posterior cranial fossa and upper cervical spine. A standard suboccipital surgical approach was used to

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“…However, there is evidence in the literature of this possibility. Floris et al reported a case of a patient in whom a supracerebellar cyst caused reversible tonsillar herniation [14].…”

Section: Discussionmentioning

confidence: 99%