scholarly journals Meningioma of the posterior cranial fossa with obstructive hydrocephalus

2021 ◽  
Author(s):  
Ammar Haouimi
Skull Base ◽  
2009 ◽  
Vol 19 (03) ◽  
Author(s):  
Shinya Ishimura ◽  
Takayuki Ohira ◽  
Masahito Kobayashi ◽  
Tadashige Kano ◽  
Maaya Orii ◽  
...  

Skull Base ◽  
2009 ◽  
Vol 19 (S 02) ◽  
Author(s):  
N. Syrmos ◽  
Ch. Iliadis ◽  
J. Marakomichelakis ◽  
G. Gavridakis ◽  
V. Valadakis ◽  
...  

1970 ◽  
Vol 110 (1) ◽  
pp. 39-49 ◽  
Author(s):  
F. GALLIGIONI ◽  
R. BERNARDI ◽  
M. PELLONE ◽  
G. IRACI

1989 ◽  
Vol 32 (4) ◽  
pp. 300-303 ◽  
Author(s):  
Eugenio Pozzati ◽  
Francesco Tognetti ◽  
Michele Cavallo ◽  
Nicola Acciarri

OBJECTIVE Posterior vault distraction osteogenesis (PVDO) is an effective tool to increase intracranial volume and expand the posterior cranial fossa. During PVDO, the authors extended osteotomy posterior to the foramen magnum to fully expand the posterior cranial fossa. The aim of this study was to investigate the efficacy of complete PVDO in posterior fossa expansion and treatment of Chiari malformation type I (CM-I) in patients with craniosynostosis. METHODS Patients with craniosynostosis who had undergone complete PVDO between January 2012 and May 2020 were reviewed retrospectively. A coronal osteotomy extending to the foramen magnum was performed and the foramen magnum was decompressed by removing its posterior rim with a 1-mm Kerrison rongeur. Four distractor devices were placed and the vector of distraction was controlled from the posterior to the inferior-posterior direction, depending on the deformity. Changes in the intracranial volume, posterior cranial fossa area, and cerebellar tonsillar descent were measured after complete PVDO by using CT and MRI. RESULTS A total of 11 patients with craniosynostosis and concurrent CM-I were included in the study. The mean age was 34.6 ± 24.0 months (continuous variables are expressed as the mean ± SD throughout). One patient had sleep apnea, which was consistent with CM-I, and another patient had a headache, which was nonspecific. The intracranial volume increased from 1179.6 ± 180.2 cm3 to 1440.6 ± 251.5 cm3 (p = 0.003; 24.5% increase compared to the preoperative volume). The posterior skull base area increased from 44.9 ± 19.3 cm2 to 72.7 ± 18.1 cm2 (p = 0.004). Cerebellar tonsillar descent decreased in all 11 patients after complete PVDO (preoperative: 10.8 ± 3.7 mm, postoperative: 2.7 ± 3.0 mm; p = 0.003). Among the 11 patients, 5 showed complete resolution of cerebellar tonsillar herniation. CONCLUSIONS Complete PVDO can more efficiently expand the posterior cranial fossa, unlike conventional methods. Moreover, it helps to relieve cerebellar tonsillar herniation. Complete PVDO is a powerful tool to increase the intracranial and posterior fossa volumes in patients with craniosynostosis and concurrent CM-I.


2017 ◽  
Vol 06 (02) ◽  
pp. 144-148
Author(s):  
Prithvi Varghese ◽  
Julio Kandathil ◽  
Jayasree Govindan ◽  
Rashmi R. ◽  
Muhammed Jalal

AbstractIntracranial meningiomas without dural attachment are rare and posterior cranial fossa meningiomas without dural attachment are rarer. Such meningiomas are thought to arise from arachnoid cap cells in pial membrane, tela choroidea, or choroid plexus. MRI is the best imaging modality for the diagnosis of meningiomas and typically shows an enhancing, dural based, extra-axial soft tissue mass with a characteristic dural tail. Meningioma without dural attachment should be suspected if the MRI shows a space-occupying lesion having features of a meningioma but without a dural base and dural tail. We report a case of meningioma in the lateral cerebellomedullary cistern without dural attachment.


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