"Speckled Enhancement" on Gd-EOB-DTPA Enhanced MR Imaging of Primary Hepatic Mucosa-associated Lymphoid Tissue Lymphoma.

Purpose: To elucidate MRI features of primary hepatic mucosa-associated lymphoid tissue (MALT) lymphoma, particularly, the "speckled enhancement" on gadolinium ethoxybenzyl diethylenetriamine pentaacetic acid (Gd-EOB-DTPA)-enhanced MRI.

Methods: The institutional review board approved this retrospective observational study and waived informed consent. Using our picture archiving and communication systems and electronic medical records, five patients histopathologically diagnosed as hepatic MALT lymphoma and clinically confirmed as primary lesions who had undergone dynamic contrast-enhanced (DCE)-CT and DCE-MRI with Gd-EOB-DTPA were identified from September 2009 to December 2020.

Evaluating the Effect of Arterial Pulsation on Cerebrospinal Fluid Motion in the Sylvian Fissure of Patients with Middle Cerebral Artery Occlusion Using Low b-value Diffusion-weighted Imaging.

Purpose: Decrease in signal of the cerebrospinal fluid (CSF) on low b-value diffusion weighted image (DWI) due to non-uniform flow can provide additional information regarding CSF motion. The purpose of the current study was to evaluate whether arterial pulsations constitute the driving force of CSF motion.

Methods: We evaluated the CSF signals within the Sylvian fissure on low b-value DWI in 19 patients with unilateral middle cerebral artery (MCA) occlusion.

Retropharyngeal hematoma presenting airway obstruction: A case report.

Introduction: Blunt neck trauma patients can suffer from an airway emergency and are necessary to careful observation.

Presentation Of Case: A 79-year-old man under anticoagulation therapy presented to our hospital three hours after a fall. Shortly after arrival, he developed dyspnea.

Pial arteriovenous fistula of the spine in a child with hemiplegia.

Pial arteriovenous fistula (AVF) is an extremely rare disease in children. When a child presents with sudden onset of hemiparesis and headache, it is very important to perform spinal magnetic resonance imaging (MRI) scanning for early diagnosis and treatment.

[A Patient with Advanced Gastric Cancer who Underwent Emergency Stenting for Carotid Artery Stenosis].

We report the case of a patient with advanced gastric cancer who underwent emergency stenting for carotid artery stenosis that was causing fluctuating symptoms of cerebral ischemic stroke. A 66-year-old man presented with transient dysarthria and right hemifacial palsy. Examination revealed left internal carotid artery stenosis, as well as anemia caused by advanced gastric cancer.

[Endovascular treatment of basilar artery aneurysms associated with fenestration].

Aneurysms at the vertebrobasilar junction are often found with basilar artery(BA)fenestration. We encountered 10 consecutive cases of aneurysms associated with BA fenestration. The purpose of this study is to describe the frequency, clinical features, and outcome of these aneurysms treated by endovascular procedure.

[Cavernous sinus dural arteriovenous fistulas treated with percutaneous transvenous embolization using liquid material: two case reports].

Introduction: Percutaneous transvenous embolization (TVE) using coils is a well-established treatment of cavernous sinus dural arteriovenous fistula (CSdAVF). However, it is sometimes difficult to achieve complete occlusion by coil embolization. In these two cases, we were able to obtain complete angiographic obliteration of the fistulas without complications by means of percutaneous TVE using n-butyl-cyanoacrylate (NBCA) after we failed when TVE using coils.

Endovascular coil embolization of a ruptured distal anterior choroidal artery aneurysm associated with ipsilateral middle cerebral artery occlusion--case report.

An 84-year-old woman with a history of hypertension and a brain infarction presented with a rare distal anterior choroidal artery (AChoA) aneurysm not associated with moyamoya disease manifesting as sudden onset of headache caused by intraventricular hemorrhage. Digital subtraction angiography revealed a peripheral aneurysm in the left AChoA located distal to the plexal point and steno-occlusive changes of the proximal left middle cerebral artery (MCA) and the left posterior cerebral artery (PCA). Collateral arterial channels to the left MCA and left PCA territories were observed along the left AChoA.

Computational fluid dynamics of carotid arteries after carotid endarterectomy or carotid artery stenting based on postoperative patient-specific computed tomography angiography and ultrasound flow data.

Background: There are significant differences in the postoperative morphological and hemodynamic conditions of the carotid arteries between carotid artery stenting (CAS) and endarterectomy (CEA).

Objective: To compare the postoperative rheological conditions after CAS with those after CEA with patch angioplasty (patch CEA) through the use of computational fluid dynamics (CFD) based on patient-specific data.

Methods: The rheological conditions in the carotid arteries were simulated in 2 patients after CAS and in 2 patients after patch CEA by CFD calculations.

Optimal dose of plasmid vascular endothelial growth factor for enhancement of angiogenesis in the rat brain ischemia model.

Vascular endothelial growth factor (VEGF) administration has recently been assessed as a therapeutic strategy for ischemic diseases including brain ischemia because of its angiogenic effect. However, VEGF also causes detrimental adverse effects by increasing vascular permeability. This study examined whether plasmid human VEGF (phVEGF) administration induced angiogenic effects in the rat brain ischemia model caused by permanent ligation of both common carotid arteries, and investigated the occurrence of adverse effects.

Rebleeding from a vertebral artery dissecting aneurysm after endovascular internal trapping: adverse effect of intrathecal urokinase injection or incomplete occlusion?-case report-.

A 67-year-old woman suffered rebleeding from a ruptured vertebral artery dissecting aneurysm after endovascular internal trapping. The dissecting aneurysm was initially successfully occluded with the affected vertebral artery using detachable coils. However, rebleeding from the aneurysm occurred on the next day.

Significant differences in the postoperative morphological and hemodynamic conditions of carotid arteries of patients undergoing stenting or endarterectomy with patch angioplasty.

Objective: Carotid endarterectomy with a patch graft (Patch CEA) has been our standard treatment for patients with carotid artery stenosis, but carotid artery stenting (CAS) has emerged as an alternative. The purpose of this study was to compare the postoperative changes in the configurations and the flow velocities of carotid arteries after CAS or Patch CEA.

Methods: Thirty-one patients undergoing CAS or Patch CEA were included.

Efficacy of a lumbo-peritoneal shunt for meningeal carcinomatosis refractory to gefitinib treatment.

A 51-year-old female presented with left facial palsy. She had adenocarcinoma of the lung with multiple brain metastases. The primary tumor regressed after treatment with gefitinib, however, neurological symptoms progressed rapidly because of meningeal carcinomatosis, when a deletion mutation in exon 19 of the epidermal growth factor receptor in cells from her cerebrospinal fluid was detected.

Triple-catheter technique in the transvenous coil embolization of an isolated sinus dural arteriovenous fistula.

Objective: Dural arteriovenous fistulae involving the transverse-sigmoid sinus, which is occluded at its proximal and distal ends (i.e., an isolated sinus), carry a high risk of intracranial hemorrhage or progressive neurological deficits.

[Case of a ruptured vertebral artery dissecting aneurysm recanalized after internal trapping].

A 35-year-old male experienced a sudden onset of severe headache. A CT scan revealed subarachnoid hemorrhage. By cerebral angiography, he was diagnosed as having a ruptured right vertebral artery dissecting aneurysm (VADA).

Interhemispheric multiloculated ependymal cyst with dysgenesis of the corpus callosum: a case in a preterm fetus.

Introduction: The authors report a case of interhemispheric ependymal cyst accompanied with agenesis of the corpus callosum in a fetus.

Discussion: Routine ultrasound and subsequent magnetic resonance imaging of a 20-year-old woman at 33 weeks and 1 day of gestation detected a large interhemispheric cystic lesion in the fetal cranial cavity. Caesarian section was carried out at 36 weeks because of the progressive enlargement of the fetal head.

Enhanced brain angiogenesis in chronic cerebral hypoperfusion after administration of plasmid human vascular endothelial growth factor in combination with indirect vasoreconstructive surgery.

Object: Vascular endothelial growth factor (VEGF) is a secreted mitogen associated with angiogenesis. The conceptual basis for therapeutic angiogenesis after plasmid human VEGF gene (phVEGF) transfer has been established in patients presenting with limb ischemia and myocardial infarction. The authors hypothesized that overexpression of VEGF using a gene transfer method combined with indirect vasoreconstruction might induce effective brain angiogenesis in chronic cerebral hypoperfusion, leading to prevention of ischemic attacks.

Quantitative analysis of radioisotope cisternography in the diagnosis of intracranial hypotension.

Object: The authors attempted a quantitative analysis of conventional radioisotope cisternography for the purpose of more accurate diagnosis of intracranial hypotension.

Methods: Fifty-seven patients suspected of having intracranial hypotension underwent radioisotope cisternography. Whole-body images were obtained 2.

[A review of dural arteriovenous fistulas with hemorrhagic onset].

The majority of dural arteriovenous fistulas are considered to have a benign clinical course, but some behave more aggressively, causing progressive neurological symptoms and/or intracranial hemorrhage. Several classifications of angiographic findings have been reported to predict what findings might result in catastrophic presentation. Cortical venous drainage has been described as one of the major risk factors of hemorrhage.

[Usefulness of dynamic digitized cerebral parenchymography for cerebral vascular disease].

Aortic arch injections according to Theron's method have been performed in patients with cerebral ischemia. Digital subtraction angiograms with modified windowing (low and narrow) have been used for better visualization of cerebral parenchymal condition. This "cerebral parenchymography" allows much easier understanding of cerebral parenchymal vascularization on angiographic imaging.