scholarly journals Falco-Tentorial Meningioma Producing Irreversible Midbrain Damage

2014 ◽  
Vol 21 (3) ◽  
pp. 301-304
Author(s):  
Amit Agrawal
Keyword(s):  
Ct Scan ◽  
Obstructive Hydrocephalus ◽  
Fatal Outcome ◽  
Surgical Decompression ◽  
Cerebral Veins ◽  
Tentorial Meningioma ◽  
Brain Surface ◽  
Deep Cerebral Veins ◽  
History Of ◽  
The Brain

Abstract Meningiomas arising from the falcotentorial junction are the rarest subgroup of tentorial menigiomas. Because of the distance from the brain surface and the surrounding deep cerebral veins these lesions are difficult and dangerous to treat surgically. A 45-year-old female presented with the history of progressive headache, disorientation, unsteadiness, and urinary incontinence for over 6 months. The patient developed difficulty in swallowing, and weakness of all four limbs for the last 7 days. CT scan brain plain and contrast showed a large well defined, homogenously enhancing mass lesion in the peineal region with compression of the upper brain stem and obstructive hydrocephalus. Inspite of the good surgical decompression the patient did not do well. As described in the literature, the compression of the midbrain can cause severe respiratory disturbances with fatal outcome; probably the similar mechanism resulted in poor outcome in present case. As we noticed the diffuse hypodensity in midbrain on CT scan, similar findings have been described in literature in cases of transtentorial herniation with poorer outcome.

Hematoma from arteriovenous malformation producing hydrocephalus and simulating a thalamic tumor

1971 ◽  
Vol 34 (2) ◽  
pp. 229-235 ◽  
Author(s):  
Larry K. T. Ng ◽  
Gabriel Schwarz ◽  
Mark M. Mishkin
Keyword(s):  
Vascular Malformation ◽  
Obstructive Hydrocephalus ◽  
Third Ventricle ◽  
Intracerebral Hematoma ◽  
Content Type ◽  
The Third ◽  
Brain Substance ◽  
History Of ◽  
The Brain ◽  
Symptoms And Signs

✓ Two patients with a history of progressive unilateral neurological symptoms and signs, and evidence of obstructive hydrocephalus from a mass lesion adjacent to the third ventricle as demonstrated by pneumography, were each found to have an intracerebral hematoma secondary to remote hemorrhage from a small vascular malformation. One patient died shortly after surgical exploration and the other after ventriculography. The pathophysiology of hydrocephalus associated with a vascular malformation is discussed and the need for considering a benign cause for obstructive hydrocephalus from a mass deep in the brain substance is emphasized.

scholarly journals Metallic embolus to the brain in a patient with mechanical heart valves: an extremely rare complication

2019 ◽  
Vol 12 (8) ◽  
pp. e230653 ◽  
Author(s):  
Shazib Sagheer ◽  
Abu Baker Sheikh ◽  
Jon J Hallstrom ◽  
Veena Raizada
Keyword(s):  
Ct Scan ◽  
Heart Valves ◽  
Rare Complication ◽  
Replacement Surgery ◽  
Mechanical Valves ◽  
Rheumatic Valve Disease ◽  
History Of ◽  
The Right ◽  
The Brain ◽  
Paroxysmal Positional Vertigo

A 46-year-old man with a medical history of rheumatic valve disease underwent mitral and aortic valve replacements with On-X and CarboMedics Top Hat supra-annular mechanical valves, respectively. Seven months after the valve replacement surgery, the patient presented with dizziness. A CT scan of the brain was done as part of a thorough workup of dizziness. The CT scan revealed a small metallic density in the M2 branch of the right middle cerebral artery. The metallic density was believed to be a metallic embolus that originated from the mechanical valves or the suturing material, that is, Cor-Knot fastener. Although in our case, the dizziness was believed to be the result of benign paroxysmal positional vertigo, through this case, we aim to highlight this extremely rare structural complication of mechanical valves. This complication can have serious and potentially fatal consequences such as embolic component-related stroke or another organ infarction.

Virtually Peeling Off the Skull and Scalp: A Simple Way of Mapping the Superficial Cerebral Veins on the Brain Surface

2008 ◽  
Vol 86 (6) ◽  
pp. 345-350 ◽  
Author(s):  
X.Y. Gong ◽  
S. Higano ◽  
S. Mugikura ◽  
A. Umetsu ◽  
T. Murata ◽  
...  
Keyword(s):  
Cerebral Veins ◽  
Brain Surface ◽  
The Brain ◽  
Peeling Off

scholarly journals CT Scan Features of Presumptive Haemorrhagic Stroke in a Dog with Cushing’s Disease

2014 ◽  
Vol 2014 ◽  
pp. 1-3 ◽  
Author(s):  
A. Liotta ◽  
R. Cavrenne ◽  
D. Peeters ◽  
J. Manens ◽  
G. Bolen
Keyword(s):  
Ct Scan ◽  
Multislice Computed Tomography ◽  
Brain Lesion ◽  
Haemorrhagic Stroke ◽  
Neurological Dysfunction ◽  
Intact Male ◽  
Area 5 ◽  
History Of ◽  
The Brain ◽  
History Of Depression

A 9-year-old, intact male, Brie’s shepherd dog, with a 10-day history of depression and tachypnoea developed signs of central neurological dysfunction. 16 Multislice Computed Tomography (CT) pre- and postcontrast studies of the brain revealed a single intra-axial homogeneous well-circumscribed hyperattenuating (+/− 62 HU) and noncontrast-enhancing area, 5 mm in diameter, in the caudal part of the mesencephalon. This finding was highly suggestive of a haemorrhagic event. A pituitary-dependent hyperadrenocorticism (PDH) was identified and is considered likely to be the underlying cause. A repeat CT scan examination, 2 months later, showed almost complete resolution of the brain lesion. The present case describes a solitary 5 mm diameter lesion: the result of intracranial haemorrhage in a dog with presumed PDH.

Analytical Electron Microscopy (AEM) of Meningeal Cells Exposed to Particulate Cobalt During Studies of Experimental Epilepsy

1982 ◽  
Vol 40 ◽  
pp. 186-187
Author(s):  
R.G. Frederickson ◽  
R.G. Ulrich ◽  
J.L. Culberson
Keyword(s):  
Electron Microscopy ◽  
Analytical Electron Microscopy ◽  
Experimental Epilepsy ◽  
Metallic Cobalt ◽  
Experimental Animals ◽  
X Ray ◽  
Brain Surface ◽  
Meningeal Cells ◽  
Analytical Electron ◽  
The Brain

Metallic cobalt acts as an epileptogenic agent when placed on the brain surface of some experimental animals. The mechanism by which this substance produces abnormal neuronal discharge is unknown. One potentially useful approach to this problem is to study the cellular and extracellular distribution of elemental cobalt in the meninges and adjacent cerebral cortex. Since it is possible to demonstrate the morphological localization and distribution of heavy metals, such as cobalt, by correlative x-ray analysis and electron microscopy (i.e., by AEM), we are using AEM to locate and identify elemental cobalt in phagocytic meningeal cells of young 80-day postnatal opossums following a subdural injection of cobalt particles.

A new technique for the mapping of oxygen tension on the brain surface

2005 ◽  
Vol 25 (1_suppl) ◽  
pp. S543-S543
Author(s):  
Satoshi Kimura ◽  
Keigo Matsumoto ◽  
Yoshio Imahori ◽  
Katsuyoshi Mineura ◽  
Toshiyuki Itoh
Keyword(s):  
Oxygen Tension ◽  
New Technique ◽  
Brain Surface ◽  
A New Technique ◽  
The Brain

Adenoid Cystic Carcinoma of Lacrimal Gland

JMS SKIMS ◽  
2012 ◽  
Vol 15 (1) ◽  
pp. 76-77
Author(s):  
Mohd Athar ◽  
K S Sodhi ◽  
S Kala ◽  
R K Maurya ◽  
S Chauhan ◽  
...  
Keyword(s):  
Local Recurrence ◽  
Natural History ◽  
Adenoid Cystic Carcinoma ◽  
Salivary Glands ◽  
Hard Palate ◽  
Clinical Course ◽  
Fatal Outcome ◽  
Minor Salivary Glands ◽  
Adenoid Cystic ◽  
History Of

Adenoid cystic carcinoma is a relatively uncommon tumour of salivary, glands and is characterised by a prolonged clinical course and a fatal outcome. It was first described as `cylindroma' by Billroth in 1859. Half of these tumors occur in glandular tissues other than the major salivary glands; principally in the hard palate, but they can also arise in the tongue and minor salivary glands. Unusual locations include the external auditory canal, nasopharynx, lacrimal glands, breast, vulva, esophagus, cervix and Cowper glands. The long natural history of this tumor and its tendency for local recurrence are well known. JMS 2012;15(1):76-77.

Frontier concept of rabi chip for intelligent humanoid

2018 ◽  
Vol 1 (2) ◽  
Author(s):  
Preecha Yupapin ◽  
Amiri I. S. ◽  
Ali J. ◽  
Ponsuwancharoen N. ◽  
Youplao P.
Keyword(s):  
Human Brain ◽  
Brain Function ◽  
Rabi Oscillation ◽  
Liquid Core ◽  
Brain Surface ◽  
Dipole Oscillation ◽  
On Chip ◽  
The Brain ◽  
Robotic Applications ◽  
Atom System

The sequence of the human brain can be configured by the originated strongly coupling fields to a pair of the ionic substances(bio-cells) within the microtubules. From which the dipole oscillation begins and transports by the strong trapped force, which is known as a tweezer. The tweezers are the trapped polaritons, which are the electrical charges with information. They will be collected on the brain surface and transport via the liquid core guide wave, which is the mixture of blood content and water. The oscillation frequency is called the Rabi frequency, is formed by the two-level atom system. Our aim will manipulate the Rabi oscillation by an on-chip device, where the quantum outputs may help to form the realistic human brain function for humanoid robotic applications.

A Review of Various Machine Learning Techniques for Brain Tumor Detection from MRI Images

2020 ◽  
Vol 16 (8) ◽  
pp. 937-945
Author(s):  
Aaishwarya Sanjay Bajaj ◽  
Usha Chouhan
Keyword(s):  
Machine Learning ◽  
Brain Tumor ◽  
Ct Scan ◽  
Imaging Techniques ◽  
Critical Evaluation ◽  
Tumor Detection ◽  
Machine Learning Techniques ◽  
X Rays ◽  
Detection Techniques ◽  
The Brain

Background: This paper endeavors to identify an expedient approach for the detection of the brain tumor in MRI images. The detection of tumor is based on i) review of the machine learning approach for the identification of brain tumor and ii) review of a suitable approach for brain tumor detection. Discussion: This review focuses on different imaging techniques such as X-rays, PET, CT- Scan, and MRI. This survey identifies a different approach with better accuracy for tumor detection. This further includes the image processing method. In most applications, machine learning shows better performance than manual segmentation of the brain tumors from MRI images as it is a difficult and time-consuming task. For fast and better computational results, radiology used a different approach with MRI, CT-scan, X-ray, and PET. Furthermore, summarizing the literature, this paper also provides a critical evaluation of the surveyed literature which reveals new facets of research. Conclusion: The problem faced by the researchers during brain tumor detection techniques and machine learning applications for clinical settings have also been discussed.

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