244 research outputs found
Capitolo da libro: The Craniostenosis - In: Pediatric Neuroradiology Brain. Head, Neck and Spine– a cura di P Tortori-Donati, A Rossi
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Cystic malformations of the posterior cranial fossa originating from a defect of the posterior membranous area. Mega cisterna magna and persisting Blake's pouch: Two separate entities
No full textCystic malformations of the posterior cranial fossa are all but arachnoid cysts contained within the general context of the Dandy-Walker complex and may be further classified in two groups on the basis of their embryological origin: anomalies of the anterior membranous area (AMA) and anomalies of the posterior membranous area (PMA). Whether the latter group of malformations can be regarded as separate entities is still quite controversial. The present authors give a detailed account of the various embryological stages in the formation of the posterior cranial fossa and its contents and propose the identification of two anomalies derived from a defect of the PMA: the mega cisterna magna (MCM) and the persisting Blake's pouch, a new entity with different MRI features from MCM. Criteria for their recognition are discussed, stressing the capital importance of a differential diagnosis in view of the radically different therapeutic approach
Tumors of the Spine in Children
No full textIn children, tumors of the spine are much rarer than intracranial tumors. They are classified into intramedullary, intradural-extramedullary, and extradural tumors. Magnetic resonance imaging provides crucial information regarding the extent, location, and internal structure of the mass, thus critically narrowing the differential diagnosis and guiding surgery. © 2007 Elsevier Inc. All rights reserved
Bilateral germinoma of the basal ganglia
No full textGerminoma arising in the bilateral basal ganglia is exceedingly rare, with only five cases reported to date. Owing to non-specific clinical findings and the frequent presence of ill-defined abnormalities without a definite tumor mass on neuroimaging, the diagnosis can be difficult. We describe a case in which magnetic resonance spectroscopy (MRS) findings suggested a tumor and supported the decision to perform biopsy of the lesion. © 2006 Wiley-Liss, Inc
Echographic and tomographic evaluation of Molteno and Baerveldt implants in three children.
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Sjogren-Larsson syndrome: nuclear magnetic resonance imaging of the brein in a 4-years-old boy.
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