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Lawrence Lau, Kory London
Cerebral air embolism is a known complication from a myriad of iatrogenic causes. This case describes a 60-year-old female presenting from hemodialysis with altered mental status, bilateral homonymous hemianopia, and repetitive speech. A noncontrast head CT revealed air in the vein of Galen and the deep cerebral veins of the left thalamus and occipital sulcus, a complication from air being introduced into the patient via improper flushing of dialysis tubing. The retrograde flow of air bubbles in the upright patient during dialysis was likely responsible for the air embolus lodging in the cerebral vasculature...
2018: Case Reports in Emergency Medicine
Séverine Loridant, Gabriel Mouahid, Marjorie Cornu, Jean-François Allienne, Jordan Leroy, Claude Alain Maurage, Emilie Fréalle, Richard Assaker, Fahed Zairi, Emmanuel Dutoit, Hélène Moné, Boualem Sendid
Schistosomiasis due to Schistosoma haematobium is a widespread disease usually affecting the urinary tract associated with hematuria and kidney disorders. Neurological damage is rarely reported and symptoms are nonspecific and may suggest brain tumors such as glioma. We describe the first double ectopic haematobium schistosomiasis case involving the brain and intestine.
April 30, 2018: American Journal of Tropical Medicine and Hygiene
Minye Zhan, Beatrice de Gelder
The continuous flash suppression (CFS) paradigm has been increasingly used to study unconscious visual perception. To compare to studies in patients with brain lesions, and to backward masking studies in healthy participants, we bilaterally presented whole-body postures expressing fear or anger in an emotion discrimination task, and rendered the stimuli invisible in either one of the visual fields. We found that the CFS paradigm did not sustain the classical redundant target effect that would facilitate responses when the unconscious emotional bodies had congruent emotions; instead we found a facilitation effect on reaction times induced by the body stimuli of incongruent emotions, especially by the unconscious fearful body on the discrimination of conscious angry body...
April 23, 2018: Neuropsychologia
Mehmet N Cizmeci, Liesbeth Thewissen, Alexandra Zecic, Peter A Woerdeman, Bart de Boer, Edward Baert, Paul Govaert, Jeroen Dudink, Floris Groenendaal, Maarten Lequin, Linda S de Vries
Intracranial hemorrhage is an important cause of brain injury in the neonatal population and bedside percutaneous needle aspiration has emerged as an alternative due to the major risks that can be caused by standard neurosurgical decompression. We aimed to assess the effectiveness of this minimally invasive bedside technique and conducted a retrospective analysis of all newborn infants with a large extra-axial hemorrhage associated with a parenchymal hemorrhage causing a midline shift, managed at three academic centers over a 15-year period...
April 24, 2018: Neuropediatrics
Francisco M Costela, Sarah S Sheldon, Bethany Walker, Russell L Woods
SIGNIFICANCE: Our survey found that participants with hemianopia report more difficulties watching video in various formats, including television (TV), on computers, and in a movie theater, compared with participants with normal vision (NV). These reported difficulties were not as marked as those reported by people with central vision loss. PURPOSE: The aim of this study was to survey the viewing experience (e.g., frequency, difficulty) of viewing video on TV, computers and portable visual display devices, and at the cinema of people with hemianopia and NV...
April 20, 2018: Optometry and Vision Science: Official Publication of the American Academy of Optometry
Andrea Talacchi, Antonio Biroli, Aurel Hasanbelliu, Francesca Locatelli
BACKGROUND: Falcotentorial meningiomas (FTM) stand out for their rarity, inconsistent definition, and surgical complexity. It is appropriate to deal with them in the context of medial tentorial meningiomas (MTM). METHODS: Clinical and radiological characteristics of MTM, comprising the typical features of FTM and tentorial meningioma (TM) along with surgical management, short- and long-term outcomes, are reported . RESULTS: FTM (n=16) were typically supratentorial, large, edematous tumors that caused mainly headache and hemianopia; TM (n=12) were infratentorial, smaller not edematous tumors that caused mainly headache and gait ataxia...
April 17, 2018: World Neurosurgery
A R Smits, N Seijdel, H S Scholte, C A Heywood, R W Kentridge, E H F de Haan
Blindsight refers to the observation of residual visual abilities in the hemianopic field of patients without a functional V1. Given the within- and between-subject variability in the preserved abilities and the phenomenal experience of blindsight patients, the fine-grained description of the phenomenon is still debated. Here we tested a patient with established "perceptual" and "attentional" blindsight (c.f. Danckert & Rossetti, 2005). Using a pointing paradigm patient MS, who suffers from a complete left homonymous hemianopia, showed clear above chance manual localisation of 'unseen' targets...
March 28, 2018: Neuropsychologia
Eveline M Gutzwiller, Ivan Cabrilo, Ivan Radovanovic, Karl Schaller, Colette Boëx
OBJECTIVE The goal of this study was to determine the performance of intraoperative visual evoked potentials (VEPs) in detecting visual field changes. METHODS Assessments of VEPs were performed with simultaneous retinal responses by using white light-emitting diodes protected from scialytic microscope lights. The alarm criterion was a reproducible decrease in amplitude of the VEP P100 wave of 20% or more. Visual fields were assessed preoperatively and 1 month postsurgery (Goldmann perimetry). RESULTS The VEPs were analyzed for 29 patients undergoing resection of a brain lesion...
March 30, 2018: Journal of Neurosurgery
Anil Nanda, Devi Prasad Patra, Amey Rajan Savardekar, Nasser Mohammed, Vinayak Narayan, Shyamal C Bir
Objective  Amidst the raging debate between transnasal and transcranial approaches, the critical factor that dictates success lies in the meticulous dissection of the tumor from the optic apparatus, anterior communicating artery complex, and the pituitary stalk. In this surgical video, we describe the resection of a tuberculum sellae meningioma through the pterional approach highlighting dissection through the appropriate arachnoidal plane. Case Description  The patient is a 75-year-old female who presented with optic nerve compression with bitemporal hemianopia and endocrine function abnormalities...
April 2018: Journal of Neurological Surgery. Part B, Skull Base
Anil Nanda, Vinayak Narayan, Nasser Mohammed, Amey R Savardekar, Devi Prasad Patra
Objectives  Complete surgical resection is an important prognostic factor for recurrence and is the best management for craniopharyngioma. This operative video demonstrates the technical nuances in achieving complete resection of a suprasellar craniopharyngioma. Design and Setting  The surgery was performed in a middle-aged lady who presented with the history of progressive bitemporal hemianopia and excessive sleepiness over 8 months. On imaging, suprasellar craniopharyngioma was identified. The tumor was approached through opticocarotid cistern and lamina terminalis...
April 2018: Journal of Neurological Surgery. Part B, Skull Base
Yujiro Hattori, Shigeyuki Tahara, Osamu Yamada, Masahiro Yamaguchi, Eitaro Ishisaka, Akio Morita
BACKGROUND: Hemangioblastomas usually occur in the cerebellum, and are often a component of the von Hippel-Lindau disease. Edema-like changes along the optic tract are commonly observed in association with tumors in the sellar and suprasellar regions, such as craniopharyngiomas and pituitary adenomas. Here, we describe a case of sporadic suprasellar hemangioblastoma with edema-like changes along the optic tract that completely resolved after surgery CASE DESCRIPTION: The patient was a 28-year-old woman with failing vision and a bitemporal hemianopia...
March 23, 2018: World Neurosurgery
Loganathan Vellayan Mookan, Philip A Thomas, Ankit Anil Harwani
Purpose: To report a case presenting with bitemporal hemianopia due to traumatic chiasmal syndrome after head injury, and to compare the findings with individual case reports published in the literature. Methods: A detailed search was made in PubMed, MedIND, Taylor and Francis online and Wiley online library databases for individual case reports of traumatic chiasmal syndrome. All the case reports were read in full and the findings summarized in a table, which included details of the case who presented with bitemporal hemianopia as an index case...
March 2018: American Journal of Ophthalmology Case Reports
Sylvie Chokron, Carole Peyrin, Céline Perez
AIMS: Patients with homonymous hemianopia may present a subtle ipsilesional deficit, recently referred to as 'sightblindness' in addition to the contralesional visual field defect. We recently demonstrated that this deficit could be worse in right brain-damaged patients with left hemianopia than in left brain-damaged patients with right hemianopia, confirming right hemisphere dominance for visuo-spatial and attentional capacities. In the present study we investigate whether this ipsilesional deficit could be attentional in nature and to what extent it is comparable in right brain-damaged (RBD) patients with left hemianopia and in RBD patients with left neglect...
March 15, 2018: Neuropsychologia
Haiyong He, Wensheng Li, Chaofeng Liang, Lun Luo, Bo Hou, Huasheng Yang, Ying Guo
BACKGROUND: A pterional-orbital or subfrontal-orbital approach is recommended as a surgical treatment in cranio-orbital lesions. We describe a less invasive approach through an eyebrow incision combined supraorbital minicraniotomy and orbital osteotomy for treating some selected cranio-orbital lesions. METHODS: Sixteen patients with different cranio-orbital lesions were treated using this less invasive approach. Postoperative outcomes were evaluated to shed light on specific parameters related to this approach...
March 13, 2018: World Neurosurgery
Shuichi Tonomura, Tomoko Kitaichi, Rina Onishi, Yoshiaki Kakehi, Hisao Shimizu, Keiji Shimada, Kazuyuki Kanemasa, Akio Fukusumi, Nobuyuki Takahashi
BACKGROUND: A dural metastasis is one of the essential differential diagnoses of meningioma. In general, carcinomas of the breast and lung in females and prostate in males have been the most commonly reported primary lesions of dural metastases. However, dural metastasis of gallbladder carcinoma is extremely rare. Here, we report a unique case of a dural matter metastasis of gallbladder carcinoma as the first manifestation, which was autopsy-defined as small cell carcinoma. CASE PRESENTATION: A 78-year-old man came to our hospital complaining of left hemianopia...
March 16, 2018: World Journal of Surgical Oncology
Mirna Pineda-Ortíz, Gustavo Pacheco-López, Moisés Rubio-Osornio, Carmen Rubio, Juan Valadez-Rodríguez
RATIONALE: Visual therapy, which includes a restorative and compensatory approach, seems to be a viable treatment option for homonymous defects of the visual field in patients with postgeniculate injury of the visual pathway, due to occipital arteriovenous malformation (AVM). Until now, the Mexican population suffering from homonymous hemianopia did not have health services that provided any type of visual therapy for their condition. PATIENT CONCERNS: A 31-year-old patient, who underwent a surgical procedure for resection of the AVM, was referred with posterior low vision on the left side...
March 2018: Medicine (Baltimore)
Koji Tanaka, Toshiyuki Uehara, Kazumi Kimura, Yasushi Okada, Yasuhiro Hasegawa, Norio Tanahashi, Akifumi Suzuki, Jyoji Nakagawara, Kazumasa Arii, Shinji Nagahiro, Kuniaki Ogasawara, Shinichiro Uchiyama, Masayasu Matsumoto, Koji Iihara, Kazunori Toyoda, Kazuo Minematsu
BACKGROUND: A transient visual symptom (TVS) is a clinical manifestation of transient ischemic attack (TIA). The aim of this study was to investigate differences in clinical characteristics among subtypes of TVS using multicenter TIA registry data. MATERIALS AND METHODS: Patients with TIA visiting within 7 days of onset were prospectively enrolled from 57 hospitals between June 2011 and December 2013. Clinical characteristics were compared between patients with 3 major subtypes of TVS (transient monocular blindness [TMB], homonymous lateral hemianopia [HLH], and diplopia)...
June 2018: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
Rune Skovgaard Rasmussen, Anne Marie Heltoft Schaarup, Karsten Overgaard
BACKGROUND: Serious and often lasting vision impairments affect 30% to 35% of people following stroke. Vision may be considered the most important sense in humans, and even smaller permanent injuries can drastically reduce quality of life. Restoration of visual field impairments occur only to a small extent during the first month after brain damage, and therefore the time window for spontaneous improvements is limited. One month after brain injury causing visual impairment, patients usually will experience chronically impaired vision and the need for compensatory vision rehabilitation is substantial...
February 27, 2018: JMIR Research Protocols
Giulia Cossu, Roy T Daniel, Patrick Francois, Christophe Destrieux, Mahmoud Messerer
BACKGROUND: Isolated sphenoid mucoceles are rare, but because of their close proximity to important vasculonervous structures, local extension may result in serious consequences. CASE DESCRIPTION: A 47-year-old patient presented with headaches, meningismus, and a left homonymous lateral hemianopia. We report the atypical evolution of a posttraumatic sphenoid mucocele invading the sellar region and extending into the subarachnoid space with compression of the right optic tract, and we describe its surgical management...
May 2018: World Neurosurgery
Rimal H Dossani, Devi P Patra, Christopher Storey, Piyush Kalakoti, Hai Sun
Objective  The video stars orbitozygomatic resection of Rathke's cleft cyst with suprasellar extension in a 37-year-old male patient presenting with severe headaches and bitemporal hemianopia. Clinical and radiological characteristics along with surgical technique (positioning, bony opening, surgical dissection and debulking, closure), histopathology, and postoperative course are described. Methods  Preoperative MRI demonstrated a noncontrast-enhancing cystic lesion in the sella with suprasellar extension causing compression of both optic nerves...
February 2018: Journal of Neurological Surgery. Part B, Skull Base
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