Download e-book for kindle: Pediatric Neurosurgery by David M. Frim, N. Gupta

By David M. Frim, N. Gupta

ISBN-10: 1423766563

ISBN-13: 9781423766568

ISBN-10: 1570596433

ISBN-13: 9781570596438

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As a consequence, there is rapid arteriovenous shunting, which can lead to a vascular “steal” phenomenon and chronic hypoperfusion of adjacent brain parenchyma. Conventional cerebral angiography is the modality of choice for initial evaluation of AVMs. Scans must also be scrutinized for associated aneurysms and evidence of stenoses involving the draining veins since these features increase the risk of hemorrhage. On CT and MRI, AVMs appear as a tangle of enhancing, enlarged vessels (Fig. 7). Hemorrhage may be present.

The intervening septum may be bony (in about half of all cases) or fibrous. The splitting usually occurs along the lower thoracic and lumbar spine. , dimples, nevi, hairy patches, hemangiomas), scoliosis and clubfeet. Split-cord malformations are almost always associated with significant segmentation anomalies, especially fusion of the lamina of adjacent vertebral bodies. Transaxial T1- and T2-WI must be obtained to evaluate for a fatty and/or thickened filum and any associated hydromyelia. Transaxial T2*-WI are useful for investigating the septum, which appears hypointense if ossified or large.

Noncommunicating hydrocephalus, secondary to fourth ventricular medulloblastoma. Temporal horns are markedly enlarged. (transaxial CT) Pediatric Brain Tumors Tumors of the central nervous system are the second-most common group of childhood neoplasms, after leukemia and lymphoma. Children affected by brain tumors have clinical presentations that vary with patient’s age and location and growth rate of the mass. Infants can present with vomiting or lethargy, cranial nerve or motor dysfunction, or an enlarging head size due to hydrocephalus.

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Pediatric Neurosurgery by David M. Frim, N. Gupta

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