scholarly journals Intracranial brain parenchymal spread of mucormycosis through olfactory tract: a diffusion-weighted imaging-based concept

2020 ◽  
Vol 9 (12) ◽  
pp. 205846012098099
Author(s):  
J. Sandron ◽  
Ph. Hantson ◽  
T. Duprez
Keyword(s):  
Paranasal Sinuses ◽  
Diffusion Weighted Imaging ◽  
Disease Process ◽  
Brain Parenchyma ◽  
Brain Invasion ◽  
Olfactory Tract ◽  
Diffusion Weighted ◽  
Brain Parenchymal ◽  
Contiguous Spread ◽  
The Brain

Mucormycosis is an opportunistic fungal infection involving among others the paranasal sinuses, nasal fossa and brain parenchyma. Mucor can invade the brain parenchyma by either contiguous spread from the paranasal sinuses or through vascular invasion. We report a case of fatal rhino-cerebral mucormycosis in whom cytotoxic edema at magnetic resonance diffusion-weighted imaging was symmetrically restricted to both neocortical and paleocortical primary areas of olfactory projection at earliest phase of the disease process. Shortly later tissue damage extended into the whole brain. This undescribed observation raised the hypothesis of preferential way of brain invasion by Mucor through the olfactory tract.

Analysis of Changes in Signal Intensity of Choroid Plexus in MRI Using FLAIR-DW-EPI Pulse Sequence

2020 ◽  
Vol 3 (1) ◽  
pp. 9-15
Author(s):  
Jingyu Kim ◽  
◽  
Sang-Jin Im ◽  
Keyword(s):  
Choroid Plexus ◽  
Signal Intensity ◽  
Pulse Sequence ◽  
Signal Strength ◽  
Brain Parenchyma ◽  
Weighted Image ◽  
Diffusion Weighted ◽  
Water Signal ◽  
The Brain ◽  
Functional Problems

In this study, the signal intensity of choroid plexus, which is producing cerebrospinal fluid, is analyzed according to the FLAIR diffusion-weighted imaging technique. In the T2*-DW-EPI diffusion-weighted image, the FLAIR-DW-EPI technique, which suppressed the water signal, was additionally examined for subjects with high choroid plexus signals and compared and analyzed the signal intensity. As a result of the experiment, it was confirmed that the FLAIR-DW-EPI technique showed a signal strength equal to or lower than that of the brain parenchyma, and there was a difference in signal strength between the two techniques. As a result of this study, if the choroidal plexus signal is high in the T2 * -DW-EPI diffusionweighted image, additional examination of the FLAIR-DW-EPI technique is thought to be useful in distinguishing functional problems of the choroid plexus. In conclusion, if the choroidal plexus signal is high on the T2*-DW-EPI diffuse weighted image, it is thought that further examination of the FLAIR-DW-EPI technique will be useful in distinguishing functional problems of the choroidal plexus.

Diffusion-Weighted Imaging of the Brain in Preterm Infants With Focal and Diffuse White Matter Abnormality

PEDIATRICS ◽  
2003 ◽  
Vol 112 (1) ◽  
pp. 1-7 ◽  
Author(s):  
S. J. Counsell ◽  
J. M. Allsop ◽  
M. C. Harrison ◽  
D. J. Larkman ◽  
N. L. Kennea ◽  
...  
Keyword(s):  
White Matter ◽  
Preterm Infants ◽  
Diffusion Weighted Imaging ◽  
White Matter Abnormality ◽  
Diffuse White Matter ◽  
Diffusion Weighted ◽  
The Brain

A characteristic feature of acute haematomas in the brain on echo-planar diffusion-weighted imaging

2002 ◽  
Vol 44 (11) ◽  
pp. 907-911 ◽  
Author(s):  
Morita N. ◽  
Harada M. ◽  
Yoneda K. ◽  
Nishitani H. ◽  
Uno M.
Keyword(s):  
Characteristic Feature ◽  
Diffusion Weighted Imaging ◽  
Diffusion Weighted ◽  
Echo Planar ◽  
The Brain

Perioperative Ischemic Complications of the Brain After Carotid Endarterectomy

Neurosurgery ◽  
2010 ◽  
Vol 67 (2) ◽  
pp. 286-294 ◽  
Author(s):  
Matthew O. Hebb ◽  
Joseph E. Heiserman ◽  
Kirsten P. N. Forbes ◽  
Joseph M. Zabramski ◽  
Robert F. Spetzler
Keyword(s):  
Cerebral Ischemia ◽  
Carotid Endarterectomy ◽  
Diffusion Weighted Imaging ◽  
Safe Procedure ◽  
Carotid Revascularization ◽  
Diffusion Weighted ◽  
Marginal Mandibular Nerve ◽  
Ischemic Complications ◽  
The Brain ◽  
Radiological Studies

Abstract BACKGROUND The potential morbidity of cerebral ischemia after carotid endarterectomy (CEA) has been recognized, but its reported incidence varies widely. OBJECTIVE To prospectively evaluate the development of cerebral ischemic complications in patients treated by CEA at a high-volume cerebrovascular center. METHODS Fifty patients with moderate or severe carotid stenosis awaiting CEA were studied with perioperative diffusion-weighted imaging of the brain and standardized neurological evaluations. Microsurgical CEA was performed by 1 of 2 vascular neurosurgeons. Radiological studies were evaluated by faculty neuroradiologists who were blinded to the details of the clinical situation. RESULTS Preoperative diffusion-weighted imaging studies were performed within 24 hours of surgery. A second study was obtained within 24 (92% of patients), 48 (4% of patients), or 72 (4% of patients) hours after surgery. Intraluminal shunting was used in 1 patient (2%), and patch angioplasty was used in 2 patients (4%). No patient had diffusion-weighted imaging evidence of procedure-related cerebral ischemia. Nonischemic complications consisted of postoperative confusion in an 87-year-old man with a urinary tract infection and a marginal mandibular nerve paresis in another patient. Radiological studies were normal in both patients. CONCLUSION CEA is a relatively safe procedure that may be performed with an acceptable risk of cerebral ischemia in select patients. The low rate of ischemic complications associated with CEA sets a standard to which other carotid revascularization techniques should be held. The current results are presented with a discussion of the senior author's preferred surgical technique and a brief review of the literature.

Imaging of the brain, including diffusion-weighted imaging in methylmalonic acidemia

2004 ◽  
Vol 34 (7) ◽  
pp. 580-582 ◽  
Author(s):  
Steven J. Michel ◽  
Curtis A. Given ◽  
William C. Robertson
Keyword(s):  
Diffusion Weighted Imaging ◽  
Methylmalonic Acidemia ◽  
Diffusion Weighted ◽  
The Brain
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