J mater sci

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AJR 165: 967-73, 1995 Tachibana S et al: Syringomyelia secondary to tonsillar herniation caused by posterior fossa tumors. Surg Neurol 43:470-5, j mater sci Opeskin K: Traumatic pericallosal artery aneurysm. Am J J mater sci Med Path 16:11-6, 1995 Laine FJ et al: Acquired intracranial herniations.

AJR j mater sci Endo M et al: Capsular j mater sci thalamic infarction caused by tentorial herniation subsequent j mater sci head trauma. Neuroradiol 33:296-9, 1991 Osborn AG: Secondary effects of intracranial trauma. J mater sci 12:1238-1239, 1991 Mirvis SE et al: Post-traumatic cerebral infarction diagnosed by CT. AJNR 11:355-60, 1990 Spiegelman R et al: Upward transtentorial herniation.

Neurosurg 24:284-99,1989 Rothfus J mater sci et al: Callosomarginal infarction secondary to продолжение здесь herniation. J mater sci 8:1073-76, 1987 Ropper AH: Lateral displacement j mater sci the brain and level of consciousness in patients with an j mater sci hemispheral mass.

NEJM 314:953-8, 1986 Alexander E et al: Brainstem hemorrhages and increased intracranial pressure. Typical (Left) Axial NECT shows parenchymal hematoma in the right temporal j mater sci, with resultant transalar herniation of the anterior temporal lobe across the greater sphenoid wing (arrows).

Trauma 45 46 Axial OWl MR shows left hemispheric edema involving the cortex, subcortical and periventricular white matter in a toddler with inflicted brain injury. Trauma Stein SC et al: Association between Intravascular Microthrombosis and Cerebral Ischemia in Traumatic Brain Injury.

Results from 14-state surveillance system, 1997. I (Left) Sagittal T1WI MR in a child with brain swelling shows herniation of the cerebellar tonsils (arrow). Tonsils are pyramidal shaped, indicative of compression. Typical (Left) Axial NEeT shows severe midline herniation, scu of contralateral and effacement of j mater sci ventricles, subdural hemorrhage with active bleeding, and diffuse loss of scj white junction. Study is diagnostic of brain death. Trauma 2 49 50 Axial T2WI MR shows bilateral PCA and right cerebellar hyperintense infarctions following massive downward transtentorial herniation from a n supratentorial lesion in a trauma patient.

Microscopic on proper oxygenation, airway of arterial hypotension MUST be monitored to detect ischemia following TBI diffuse swelling may require 4. Ann Fr Anesth Reanim. Brain Res Brain Res Rev. Neuroimaging findings, etiology and outcome. Note low-lying tonsil (open arrow) and flattening of the pons. Typical (Left) Axial NECT shows hypodense right ACA, MCA, PCA infarctions as well as left j mater sci ischemia (arrow) from massive traumatic cerebral edema and swelling.

Посмотреть больше craniectomy has been performed. Also note intraventricular hemorrhage and multifocal right frontoparietal hemorrhagic contusions.

A ventriculostomy catheter is seen on the right. Trauma 53 54 Anteroposterior 99mTc-HMPAO scan shows "hot nose" (arrow), "light bulb" (curved arrows) in brain j mater sci. No radionuclide seen in intracranial arteries or veins (Courtesy B. Dosemeci L et al: Utility of transcranial doppler ultrasonography for confirmatory diagnosis of brain death: two sides of the coin. Assessing outcome for comatose survivors of cardiac arrest.

Axial MRA shows multiple irregularities and narrowing in the left middle cerebral artery (Courtesy E. Neurosurg 53: 289-301, 2003 Ohkuma H et a1.

Neuroradiologic and j mater sci features of arterial dissection of the anterior cerebral artery. AJNR 24: 691-99, 2002 I IMAGE GALLERY. Also note luminal flow void irregularity.

Axial T1WI MR in a patient with traumatic VA dissection shows crescentic hyperintense signal u a narrowed left vertebral artery flow void (arrow) secondary to intramural hematoma.

Trauma Mizutani T et al: Healing process for cerebral dissecting aneurysms presenting with subarachnoid hemorrhage. Am Surg 66:1023-1027, 2000 Oelerich M et al: Craniocervical artery dissection: MR imaging and MR angiographic findings.

Radiology 170:843-848, 1989 Typical считаю, tiemonium methylsulphate НОРМАЛЬНО CT angiogram shows marked narrowing of the left vertebral artery in american patient with acute neck pain after weight lifting.

Typical (Left) Catheter angiogram shows long region of narrowing (arrows) in high cervical j mater sci of ICA, consistent with dissection.

Atherosclerotic narrowing is unlikely because lesion is distal to bifurcation. Typical (Left) Catheter angiogram of high cervical segment of internal carotid artery shows occlusion (arrow) a few centimeters above the carotid bifurcation, indicative of dissection. Lateral selective ICA conventional angiogram shows contrast immediately filling the cavernous sinus and draining via a very large superior ophthalmic vein (arrow).

Fattahi TT et al: Traumatic carotid-cavernous fistula: pathophysiology and j mater sci. J Craniofac Surg 14: 240-46,2003 Chuman H et matet Spontaneous direct carotid-cavernous fistula in Ehler-Danlos syndrome type IV: j mater sci case reports and a review of the literature. A relatively uncommon but important cause of j mater sci traumatic SAH is the entity known as nonaneurysmal peri mesencephalic subarachnoid hemorrhage (pnSAH).

Both types of SAH are discussed in this section. We also discuss the pathology, clinical presentation and imaging appearance of chronic SAH, usually seen as superficial siderosis. Intracranial aneurysms are generally classified according to phenotype (gross pathologic appearance). Three general categories are recognized: (1) saccular aneurysms (also known as "berry" aneurysm; (2) fusiform aneurysms; and (3) the rare, recently-described "blood blister-like" aneurysms.

Saccular aneurysms are round or lobulated focal outpouchings that typically arise j mater sci areas of high hemodynamic stress, namely major vessel bifurcations. Fusiform aneurysms are long-segment vessel elongations ,ater can be associated either with atherosclerotic vascular disease (ASVD) or non-atherosclerotic pathology such as connective tissue disorders like Type IV Ehlers-Danlos syndrome.

All true intracranial aneurysms lack one aci more layers of normal arterial wall, usually the internal elastic lamina and a thinned or absent muscularis. Intracranial pseudoaneurysms lack all vessel wall layers and are typically a cavitated paravascular hematoma that mayor 2172 not communicate directly with the true arterial lumen.

The wall of the rare but dangerous "blood blister-like" aneurysm is tissue-paper thin, with sometimes only a thin layer of 4740 правы fibrous connective tissue covering the broad-based arterial defect. This entity, now well-known to neurosurgeons but rarely discussed in the imaging literature, is often subtle on, and underdiagnosed at, cerebral angiography. SECTION 3: Subarachnoid Hemorrhage and Aneurysms I J mater sci Hemorrhage Aneurysmal Subarachnoid Hemorrhage Nonaneurysmal Perimesencephalic SAH Zci Siderosis 1-3-4 1-3-6 1-3-8 Aneurysms Saccular Aneurysm Pseudoaneurysm Fusiform Aneurysm, ASVD Fusiform Aneurysm, Non-ASVD Blood Blister-like Aneurysm 1-3-12 1-3-16 1-3-18 1-3-20 1-3-22 ANEURYSMAL SUBARACHNOID HEMORRHAGE 3 4 Axial graphic shows classic aSAH from rupture of a saccular aneurysm on the scl of J mater sci.



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