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"description": "Comment diagnostiquer une anomalie du chiasma optique ?\nQuels tests sont utilisés pour évaluer la vision ?\nQuels signes indiquent une compression du chiasma optique ?\nQuelle imagerie est la plus efficace pour le chiasma optique ?\nPeut-on détecter des tumeurs au chiasma optique ?",
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"@type": "Question",
"name": "Comment diagnostiquer une anomalie du chiasma optique ?",
"position": 1,
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"text": "Un examen ophtalmologique et des IRM cérébrales sont utilisés pour diagnostiquer."
}
},
{
"@type": "Question",
"name": "Quels tests sont utilisés pour évaluer la vision ?",
"position": 2,
"acceptedAnswer": {
"@type": "Answer",
"text": "Des tests de champ visuel et des examens de la acuité visuelle sont effectués."
}
},
{
"@type": "Question",
"name": "Quels signes indiquent une compression du chiasma optique ?",
"position": 3,
"acceptedAnswer": {
"@type": "Answer",
"text": "Une perte de vision périphérique et des troubles visuels peuvent indiquer une compression."
}
},
{
"@type": "Question",
"name": "Quelle imagerie est la plus efficace pour le chiasma optique ?",
"position": 4,
"acceptedAnswer": {
"@type": "Answer",
"text": "L'IRM est la méthode d'imagerie la plus efficace pour visualiser le chiasma optique."
}
},
{
"@type": "Question",
"name": "Peut-on détecter des tumeurs au chiasma optique ?",
"position": 5,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, les tumeurs peuvent être détectées par IRM ou scanner cérébral."
}
},
{
"@type": "Question",
"name": "Quels sont les symptômes d'une lésion au chiasma optique ?",
"position": 6,
"acceptedAnswer": {
"@type": "Answer",
"text": "Les symptômes incluent une vision floue, des pertes de champ visuel et des maux de tête."
}
},
{
"@type": "Question",
"name": "Comment se manifeste une perte de vision périphérique ?",
"position": 7,
"acceptedAnswer": {
"@type": "Answer",
"text": "Elle se manifeste par une difficulté à voir les objets sur les côtés, souvent progressive."
}
},
{
"@type": "Question",
"name": "Les troubles de la vision peuvent-ils être bilatéraux ?",
"position": 8,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, des troubles bilatéraux peuvent survenir en cas de lésion au chiasma optique."
}
},
{
"@type": "Question",
"name": "Quels autres symptômes peuvent accompagner des troubles visuels ?",
"position": 9,
"acceptedAnswer": {
"@type": "Answer",
"text": "Des maux de tête, des nausées et des vertiges peuvent accompagner les troubles visuels."
}
},
{
"@type": "Question",
"name": "Peut-on avoir des hallucinations visuelles avec une lésion ?",
"position": 10,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, des hallucinations visuelles peuvent survenir en cas de lésion au chiasma optique."
}
},
{
"@type": "Question",
"name": "Comment prévenir les lésions au chiasma optique ?",
"position": 11,
"acceptedAnswer": {
"@type": "Answer",
"text": "La prévention inclut le contrôle des maladies comme le diabète et l'hypertension."
}
},
{
"@type": "Question",
"name": "Les examens réguliers de la vue sont-ils importants ?",
"position": 12,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, des examens réguliers peuvent aider à détecter précocement des problèmes visuels."
}
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{
"@type": "Question",
"name": "Peut-on éviter les traumatismes crâniens ?",
"position": 13,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, porter un casque lors d'activités à risque peut aider à éviter les traumatismes crâniens."
}
},
{
"@type": "Question",
"name": "Y a-t-il des habitudes de vie à adopter ?",
"position": 14,
"acceptedAnswer": {
"@type": "Answer",
"text": "Adopter un mode de vie sain, avec une alimentation équilibrée et de l'exercice, est bénéfique."
}
},
{
"@type": "Question",
"name": "Les maladies génétiques peuvent-elles être prévenues ?",
"position": 15,
"acceptedAnswer": {
"@type": "Answer",
"text": "Certaines maladies génétiques ne peuvent pas être prévenues, mais un suivi médical est essentiel."
}
},
{
"@type": "Question",
"name": "Quels traitements sont disponibles pour les lésions du chiasma optique ?",
"position": 16,
"acceptedAnswer": {
"@type": "Answer",
"text": "Le traitement dépend de la cause et peut inclure la chirurgie, la radiothérapie ou des médicaments."
}
},
{
"@type": "Question",
"name": "La chirurgie est-elle toujours nécessaire ?",
"position": 17,
"acceptedAnswer": {
"@type": "Answer",
"text": "Non, la chirurgie n'est nécessaire que si la lésion est causée par une tumeur ou une compression."
}
},
{
"@type": "Question",
"name": "Quels médicaments peuvent aider à soulager les symptômes ?",
"position": 18,
"acceptedAnswer": {
"@type": "Answer",
"text": "Des anti-inflammatoires et des analgésiques peuvent être prescrits pour soulager les symptômes."
}
},
{
"@type": "Question",
"name": "La radiothérapie est-elle efficace pour les tumeurs ?",
"position": 19,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, la radiothérapie peut être efficace pour réduire la taille des tumeurs au chiasma optique."
}
},
{
"@type": "Question",
"name": "Peut-on récupérer la vision après un traitement ?",
"position": 20,
"acceptedAnswer": {
"@type": "Answer",
"text": "La récupération de la vision dépend de la gravité de la lésion et du traitement reçu."
}
},
{
"@type": "Question",
"name": "Quelles complications peuvent survenir après une lésion ?",
"position": 21,
"acceptedAnswer": {
"@type": "Answer",
"text": "Des complications incluent des troubles visuels permanents et des maux de tête chroniques."
}
},
{
"@type": "Question",
"name": "Les troubles cognitifs peuvent-ils être liés au chiasma optique ?",
"position": 22,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, des troubles cognitifs peuvent survenir en raison de l'impact sur le système nerveux central."
}
},
{
"@type": "Question",
"name": "Peut-on développer une neuropathie après une lésion ?",
"position": 23,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, une neuropathie peut se développer en raison de lésions nerveuses au chiasma optique."
}
},
{
"@type": "Question",
"name": "Les complications peuvent-elles affecter la qualité de vie ?",
"position": 24,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, les complications visuelles et cognitives peuvent significativement affecter la qualité de vie."
}
},
{
"@type": "Question",
"name": "Y a-t-il un risque de récidive des symptômes ?",
"position": 25,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, il existe un risque de récidive des symptômes si la cause sous-jacente n'est pas traitée."
}
},
{
"@type": "Question",
"name": "Quels sont les facteurs de risque pour les lésions du chiasma optique ?",
"position": 26,
"acceptedAnswer": {
"@type": "Answer",
"text": "Les facteurs incluent des antécédents de tumeurs, des maladies vasculaires et des traumatismes."
}
},
{
"@type": "Question",
"name": "L'âge influence-t-il le risque de lésions ?",
"position": 27,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, le risque de lésions au chiasma optique augmente avec l'âge."
}
},
{
"@type": "Question",
"name": "Les maladies auto-immunes sont-elles un facteur de risque ?",
"position": 28,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, certaines maladies auto-immunes peuvent augmenter le risque de lésions au chiasma optique."
}
},
{
"@type": "Question",
"name": "Le diabète est-il un facteur de risque ?",
"position": 29,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, le diabète peut augmenter le risque de complications oculaires, y compris au chiasma optique."
}
},
{
"@type": "Question",
"name": "Les antécédents familiaux jouent-ils un rôle ?",
"position": 30,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, des antécédents familiaux de maladies oculaires peuvent augmenter le risque de lésions."
}
}
]
}
]
}
Department of Ophthalmology, Otto-von-Guericke-University Magdeburg, Magdeburg, Germany; Center for Behavioral Brain Sciences, Magdeburg, Germany. Electronic address: michael.hoffmann@med.ovgu.de.
York Neuroimaging Centre, Department of Psychology, University of York, York, United Kingdom; York Biomedical Research Institute, University of York, York, United Kingdom.
Student Research Committee, Babol University of Medical Sciences, Babol, Iran; Department of Clinical Biochemistry, Faculty of Medicine, Babol University of Medical Sciences, Babol, Iran.
Traumatic brain injury (TBI) often precipitates a cascade of neurophysiological alterations, impacting structures such as the optic nerve and ocular motor system. However, the literature lacks expansi...
Thorough cross-sectional and longitudinal analyses were executed, involving 42 patients with moderate to severe TBI and 35 healthy controls. OCV was acquired at 3, 6, and 12 months post-injury using T...
OCV of patients with TBI was significantly larger compared to healthy controls, persisting from 3 to 12 months post-injury (p < 0.05). This increased OCV negatively correlated with PSI at 12 months po...
For the first time, this study elucidates the increased OCV and the significant association between OCV in sub-chronic stage and PSI at 12 months post-injury, potentially providing clinicians with a t...
Diabetic neuropathy and diabetic eye disease are well known complications of type 1 diabetes. We hypothesized that chronic hyperglycemia also damages the optic tract, which can be measured using routi...
We included 188 subjects with type 1 diabetes and 30 healthy controls, all recruited as part of the Finnish Diabetic Nephropathy Study. All participants underwent a clinical examination, biochemical w...
The coronal area of the optic chiasm was smaller among those with type 1 diabetes compared to non-diabetic controls (median area 24.7 [21.0-28.5] vs 30.0 [26.7-33.3] mm...
Individuals with type 1 diabetes had smaller optic chiasms than healthy controls, suggesting that diabetic neurodegenerative changes extend to the optic nerve tract. This hypothesis was further suppor...
Low-field portable MRI (pMRI) is a recent technological advancement with potential for broad applications. Compared with conventional MRI, pMRI is less resource-intensive with regard to operational co...
Patients who underwent endoscopic endonasal surgery for sellar and suprasellar lesions at a single institution and for whom pMRI and routine MRI were performed postoperatively were retrospectively rev...
Twelve patients were included in this study (10 with pituitary adenomas and 2 with craniopharyngiomas) with varying degrees of optic chiasm compression on preoperative imaging. Measurements were avera...
The results of this study suggest that resolution of pMRI is comparable to that of conventional MRI in assessing the optic chiasm position in relation to the third ventricle. Portable MRI sufficiently...
To investigate whether morphological changes after surgery and delta-radiomics of the optic chiasm obtained from routine MRI could help predict postoperative visual recovery of pituitary adenoma patie...
A total of 130 pituitary adenoma patients were retrospectively enrolled and divided into the recovery group (n = 87) and non-recovery group (n = 43) according to visual outcome 1 year after endoscopic...
Postoperative morphological changes of the optic chiasm could not significantly be used as predictors for the visual outcome. In contrast, the delta-radiomics model represented good performances in pr...
Our proposed machine learning models based on delta-radiomics of the optic chiasm can be used to predict postoperative visual recovery of pituitary adenoma patients....
Our delta-radiomics-based models from MRI enable accurate visual recovery predictions in pituitary adenoma patients who underwent endoscopic endonasal transsphenoidal surgery, facilitating better clin...
• Prediction of the postoperative visual outcome for pituitary adenoma patients is important but challenging. • Delta-radiomics of the optic chiasm after surgical decompression represented better prog...
To date, there are no validated intraoperative tools to predict postoperative visual function following endoscopic endonasal surgery (EES). Assessment of post-surgical vision during surgery can help i...
A retrospective review was performed on patients undergoing EES for sellar and suprasellar lesions. ICG was injected prior to surgical closure at a time when the optic chiasm and anterior circulation ...
Twenty patients were included (mean age 49 years, 55% female). Eighteen patients displayed stable or improved vision after resection and demonstrated luminescence of all chiasmatic branches within 10 ...
This study shows that the lack of ICG fluorescence of SHA branches at the chiasm correlates with ischemic changes and new post-operative bitemporal hemianopsia. Lack of chiasm fluorescence after 10 se...
We present a case of an adult patient experiencing progressive visual loss. An initial presentation was concerning for neuromyelitis optica with optic chiasm involvement. However, persistent contrast ...
We aimed to investigate the changes in cupping in chiasmal lesion optic neuropathy (chON) compared to baseline optic disc and glaucoma. We used a novel study design to enroll patients who had fundus p...
Acute bilateral blindness is an emergent condition that may signal life-threatening disease. The approach focuses on identification of life-threatening disease processes, while differentiating between...
Acute bilateral blindness has an extensive differential diagnosis but chiasmopathy of ischaemic aetiology is rare.Optic chiasm stroke is rarely described in the literature and can pose a diagnostic ch...
Dolichoectatic arterial compression of the anterior visual pathway is a rare but recognized condition. The functional impact, however, is still less clear. We describe a case of a 56-year-old male wit...
The sellar region is an area in the base of the skull that is among the most common sites for tumors of the central nervous system. Surgical interventions are currently performed via different routes....
Twenty specimens collected from autopsies performed at Bursa Forensic Medicine İnstitute were examined to determine the optic chiasm types and the relationships between the surrounding subchiasmal str...
Among the 20 specimens, we found two prefixed (10%), 10 normo-fixed (50%), and eight postfixed chiasms (40%). The mean interoptic angle was 81.03 (±17.41)⁰. Prefixed chiasms had angles in the range 11...
We have proposed a simple measurement of the optic nerve lengths and the angle between them to predict the relative location of the OC, which can be done easily on MRI....