New PDF release: Differential Diagnosis in Neurology & Neurosurgery
By S. Tsementzis
I don't have adequate phrases to explain the worth of this ebook particularly for Neurology citizens. The publication is first divided into various neurological categories.In each one class the subjects which have been addressed are ordinarily obvious cases.The differential prognosis is gifted in so much systematic demeanour with the prospective explanations you as a neurologist can't find the money for to miss.Great ebook that each Neurology resident needs to hold of their pockets.It has been existence saver for me in variety of medical discussions specially by way of producing neurological differntial prognosis in 'Case administration' meetings and mattress part case overview.
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Extra info for Differential Diagnosis in Neurology & Neurosurgery
On MRI, the lesions are hypointense on T1-weighted images and hyperintense on T2-weighted images. The MRI may show no contrast enhancement, variable enhancement, or intense uniform enhancement. The contrast pattern does not correlate with the pathological grade of the tumors Dermoid tumors These are midline tumors, found most commonly in the posterior fossa and only rarely in the suprasellar region. Imaging reflects the high fat content of these lesions. Calcification is relatively common. CT shows a hypodense lesion.
3. Pituitary bacterial abscess. Coronal T1 WI demonstrates a sellar/suprasellar ring enhancing lesion containing necrotic fluid. 4. Arachnoid cyst. Sagittal T1 WI with a retrochiasmatic cyst extending into the suprasellar cisterns with an intensity signal identical to that of cerebrospinal fluid. Tsementzis, Differential Diagnosis in Neurology and Neurosurgery © 2000 Thieme All rights reserved. Usage subject to terms and conditions of license. 34 Neuroradiology Vascular lesions MR imaging is variable, depending on the presence Aneurysms of the cavernous or suprasellar and age of the thrombus ț The typical patent aneurysm lumen with rapid flow portion of the ICA or is seen as a well-delineated suprasellar mass that ACoA shows high-velocity signal loss (flow void) on T1weighted images and T2-weighted images ț Completely thrombosed aneurysms may show variable MRI findings.
Multilayered clots can be seen in thrombosed aneurysms that have undergone repeated episodes of intramural hemorrhage. Acutely thrombosed aneurysms may be isointense with brain parenchyma, and difficult to differentiate from other intracranial masses Vascular ectasias Cavernous hemangiomas Located in Meckel’s cavity and in the cavernous sinus. Due to lack of a hemosiderin rim, central large hemorrhage and calcification is extremely difficult to diagnose with MRI Caroticocavernous fistula or dural malformation Cavernous sinus throm- May occur after a septic process, after an intervenbosis tional procedure or after surgery.