Carence en vitamine B12 : Questions médicales fréquentes
Nom anglais: Vitamin B 12 Deficiency
Descriptor UI:D014806
Tree Number:C18.654.521.500.133.699.923
Termes MeSH sélectionnés :
Diffusion Tensor Imaging
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"description": "Comment diagnostiquer une carence en vitamine B12 ?\nQuels tests sont utilisés pour confirmer la carence ?\nQuels signes cliniques indiquent une carence ?\nLa carence en B12 peut-elle être asymptomatique ?\nQuel rôle joue l'historique médical dans le diagnostic ?",
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"description": "Comment traiter une carence en vitamine B12 ?\nQuelle est la durée du traitement ?\nLes aliments peuvent-ils aider à corriger la carence ?\nLes personnes végétariennes sont-elles à risque ?\nLes traitements sont-ils différents pour les enfants ?",
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"description": "Qui est le plus à risque de carence en B12 ?\nLes maladies auto-immunes augmentent-elles le risque ?\nLes médicaments peuvent-ils influencer le risque ?\nLes troubles digestifs sont-ils un facteur de risque ?\nLes antécédents familiaux jouent-ils un rôle ?",
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"@type": "Question",
"name": "Comment diagnostiquer une carence en vitamine B12 ?",
"position": 1,
"acceptedAnswer": {
"@type": "Answer",
"text": "Un diagnostic se fait par des analyses sanguines mesurant les niveaux de vitamine B12."
}
},
{
"@type": "Question",
"name": "Quels tests sont utilisés pour confirmer la carence ?",
"position": 2,
"acceptedAnswer": {
"@type": "Answer",
"text": "Les tests incluent la mesure de la vitamine B12, de l'homocystéine et de la méthylmalonyl-CoA."
}
},
{
"@type": "Question",
"name": "Quels signes cliniques indiquent une carence ?",
"position": 3,
"acceptedAnswer": {
"@type": "Answer",
"text": "Des signes comme l'anémie, la fatigue, et des troubles neurologiques peuvent indiquer une carence."
}
},
{
"@type": "Question",
"name": "La carence en B12 peut-elle être asymptomatique ?",
"position": 4,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, certaines personnes peuvent avoir une carence sans présenter de symptômes visibles."
}
},
{
"@type": "Question",
"name": "Quel rôle joue l'historique médical dans le diagnostic ?",
"position": 5,
"acceptedAnswer": {
"@type": "Answer",
"text": "L'historique médical aide à identifier des facteurs de risque comme des troubles d'absorption."
}
},
{
"@type": "Question",
"name": "Quels sont les symptômes courants de la carence en B12 ?",
"position": 6,
"acceptedAnswer": {
"@type": "Answer",
"text": "Les symptômes incluent fatigue, faiblesse, engourdissements et troubles de l'humeur."
}
},
{
"@type": "Question",
"name": "La carence en B12 peut-elle causer des problèmes neurologiques ?",
"position": 7,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, elle peut entraîner des troubles neurologiques comme des démences ou des neuropathies."
}
},
{
"@type": "Question",
"name": "Comment la carence affecte-t-elle la peau ?",
"position": 8,
"acceptedAnswer": {
"@type": "Answer",
"text": "Elle peut provoquer des changements cutanés comme une pâleur ou des lésions cutanées."
}
},
{
"@type": "Question",
"name": "Y a-t-il des symptômes digestifs associés ?",
"position": 9,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, des symptômes comme des nausées, des diarrhées ou des troubles digestifs peuvent survenir."
}
},
{
"@type": "Question",
"name": "Les symptômes varient-ils selon l'âge ?",
"position": 10,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, les symptômes peuvent être plus prononcés chez les personnes âgées en raison de l'absorption réduite."
}
},
{
"@type": "Question",
"name": "Comment prévenir la carence en vitamine B12 ?",
"position": 11,
"acceptedAnswer": {
"@type": "Answer",
"text": "Une alimentation équilibrée incluant des sources de B12 et des suppléments si nécessaire aide."
}
},
{
"@type": "Question",
"name": "Les personnes âgées doivent-elles prendre des suppléments ?",
"position": 12,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, les personnes âgées peuvent avoir besoin de suppléments en raison d'une absorption réduite."
}
},
{
"@type": "Question",
"name": "Les végétaliens peuvent-ils éviter la carence ?",
"position": 13,
"acceptedAnswer": {
"@type": "Answer",
"text": "Ils doivent prendre des suppléments de B12 ou consommer des aliments enrichis pour éviter la carence."
}
},
{
"@type": "Question",
"name": "Les tests réguliers sont-ils recommandés ?",
"position": 14,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, des tests réguliers sont conseillés pour les personnes à risque de carence."
}
},
{
"@type": "Question",
"name": "Les maladies digestives augmentent-elles le risque ?",
"position": 15,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, des maladies comme la maladie de Crohn peuvent affecter l'absorption de la vitamine B12."
}
},
{
"@type": "Question",
"name": "Comment traiter une carence en vitamine B12 ?",
"position": 16,
"acceptedAnswer": {
"@type": "Answer",
"text": "Le traitement inclut des suppléments oraux ou des injections de vitamine B12 selon la gravité."
}
},
{
"@type": "Question",
"name": "Quelle est la durée du traitement ?",
"position": 17,
"acceptedAnswer": {
"@type": "Answer",
"text": "La durée dépend de la gravité, mais peut durer de quelques mois à plusieurs années."
}
},
{
"@type": "Question",
"name": "Les aliments peuvent-ils aider à corriger la carence ?",
"position": 18,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, consommer des aliments riches en B12 comme la viande, le poisson et les produits laitiers aide."
}
},
{
"@type": "Question",
"name": "Les personnes végétariennes sont-elles à risque ?",
"position": 19,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, elles peuvent être à risque en raison d'un apport alimentaire limité en vitamine B12."
}
},
{
"@type": "Question",
"name": "Les traitements sont-ils différents pour les enfants ?",
"position": 20,
"acceptedAnswer": {
"@type": "Answer",
"text": "Les traitements sont similaires, mais les doses peuvent varier selon l'âge et le poids."
}
},
{
"@type": "Question",
"name": "Quelles complications peuvent survenir ?",
"position": 21,
"acceptedAnswer": {
"@type": "Answer",
"text": "Des complications incluent l'anémie mégaloblastique, des troubles neurologiques et des problèmes cardiaques."
}
},
{
"@type": "Question",
"name": "La carence peut-elle entraîner des problèmes cognitifs ?",
"position": 22,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, une carence prolongée peut causer des troubles cognitifs et des pertes de mémoire."
}
},
{
"@type": "Question",
"name": "Y a-t-il un risque accru de maladies cardiovasculaires ?",
"position": 23,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, une carence en B12 peut augmenter le risque de maladies cardiovasculaires en élevant l'homocystéine."
}
},
{
"@type": "Question",
"name": "Les complications sont-elles réversibles ?",
"position": 24,
"acceptedAnswer": {
"@type": "Answer",
"text": "Certaines complications peuvent être réversibles avec un traitement approprié, d'autres non."
}
},
{
"@type": "Question",
"name": "La carence en B12 peut-elle affecter la grossesse ?",
"position": 25,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, elle peut entraîner des complications pendant la grossesse, comme des malformations congénitales."
}
},
{
"@type": "Question",
"name": "Qui est le plus à risque de carence en B12 ?",
"position": 26,
"acceptedAnswer": {
"@type": "Answer",
"text": "Les personnes âgées, les végétariens, et ceux ayant des troubles d'absorption sont à risque."
}
},
{
"@type": "Question",
"name": "Les maladies auto-immunes augmentent-elles le risque ?",
"position": 27,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, des maladies comme la gastrite atrophique peuvent affecter l'absorption de la B12."
}
},
{
"@type": "Question",
"name": "Les médicaments peuvent-ils influencer le risque ?",
"position": 28,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, certains médicaments comme les inhibiteurs de la pompe à protons peuvent réduire l'absorption."
}
},
{
"@type": "Question",
"name": "Les troubles digestifs sont-ils un facteur de risque ?",
"position": 29,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, des troubles comme la maladie cœliaque peuvent nuire à l'absorption de la vitamine B12."
}
},
{
"@type": "Question",
"name": "Les antécédents familiaux jouent-ils un rôle ?",
"position": 30,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, des antécédents familiaux de carence peuvent augmenter le risque chez certains individus."
}
}
]
}
]
}
To investigate the role of diffusion tensor imaging (DTI) of optic pathway in patients with idiopathic intracranial hypertension (IIH)....
This study included 41 IIH patients and 22 controls. They underwent DTI of the optic nerve (ON) and optic radiation (OR). Their fractional anostrophy (FA) and mean diffusivity (MD) were calculated by ...
The optic nerve mean FA and MD of patients for reviewer-1 were 0.21 ± 0.047 and 2.189 ± 0.52 ×10...
Our findings suggest that, IIH is associated mainly with pre-chiasmatic or ON involvement rather than post-chiasmatic parenchymal or OR involvement. DTI MD and FA parameters of the ON may be a reliabl...
Taekwondo, which is the most preferred sport among the martial arts, is known to improve individuals physically, spiritually and mentally. The aim of this study is to reveal the effect of teakwondo sp...
Total brain volume and volumes of white matter, gray matter, frontal lobe, precentral gyrus, corticospinal tract, basal nuclei, postcentral gyrus, hippocampus and amigdala and the ratio of these volum...
An increase in total brain volume, gray matter, frontal lobe and precentral gyrus volume in athletes was associated with taekwondo training. When the ratio of brain parts to total brain volume was exa...
The increase in the volume of gray matter, frontal lobe, postcentral gyrus and corticospinal tract together with the brain volume shows that taekwondo exercise contributes to physical, spiritual and m...
The peripheral course of the trigeminal nerves is complex and spans multiple bony foramen and tissue compartments throughout the face. Diffusion tensor imaging of these nerves is difficult due to the ...
We prospectively acquired imaging data from six healthy adult participants with a 3.0-Tesla system, including T2-weighted short tau inversion recovery with variable flip angle (T2-STIR-SPACE) and read...
All nerves in all subjects were tracked beyond the trigeminal ganglion. Tracts in the inferior alveolar and ophthalmic nerve exhibited the strongest signal and most consistently reached the most dista...
This work demonstrates a method for consistently identifying and tracking the major nerve branches of the trigeminal nerve with diffusion tensor imaging....
Chronic substance use and its effects on brain function and structure has long been of interest to clinicians and researchers. Prior cross-sectional comparisons of diffusion tensor imaging (DTI) metri...
A total of 46 participants (21 healthy controls, 25 chronic cocaine users) were recruited from the Richmond, Virginia metropolitan area. Information regarding past and current substance use was collec...
Consistent with previous DTI studies, significant differences were found between fractional anisotropy (FA) and axial diffusivity (AD) CocUD and controls, with CocUD showing lower FA and AD in the rig...
These data align with previously reported declines in white matter coherence in chronic cocaine users. However, it is less clear whether comorbid alcohol consumption results in an additive deleterious...
Diffusion tensor imaging (DTI) has provided great insights into the microstructural features of the developing brain. However, DTI images are prone to several artifacts and the reliability of DTI scal...
Lewis-Sumner syndrome (LSS) is an atypical variant of chronic inflammatory demyelinating polyneuropathy characterized by an asymmetric sensory-motor neuropathy with multifocal distribution. The diagno...
The understanding of white matter (WM) was revolutionized by the emergence of tractography based on diffusion tensor imaging (DTI). Currently, DTI simulations are implemented in preoperative planning ...
WM surgical damage was preoperatively simulated by creating a 3-dimensional volume representing the endoscope or the surgical trajectory. This volume was used as an additional region of interest in th...
The preoperative and postoperative DTI studies of 30 patients undergoing various neurosurgical approaches were processed. The correlation between simulated injuries and postoperative studies was high ...
Presurgical simulation of WM fascicles based on DTI is consistent with postoperative DTI studies. These findings require further validation by neurophysiological and clinical correlation....
Diffusion tensor imaging (DTI) allows the in vivo imaging of pathological white matter alterations, either with unbiased voxel-wise or hypothesis-guided tract-based analysis. Alterations of diffusion ...
There has been growing attention on the effect of COVID-19 on white-matter microstructure, especially among those that self-isolated after being infected. There is also immense scientific interest and...
Dynamic diffusion magnetic resonance imaging (ddMRI) metrics can assess transient microstructural alterations in tissue diffusivity but requires additional scan time hindering its clinical application...
To determine whether a diffusion gradient table can simultaneously acquire data to estimate dynamic and diffusion tensor imaging (DTI) metrics....
Prospective....
Seven healthy subjects, 39 epilepsy patients (15 female, 31 male, age ± 15)....
Two-dimensional diffusion MRI (b = 1000 s/mm...
Fifteen direction DTI was repeated twice for within-session test-retest measurements in healthy subjects. Bland-Altman analysis computed bias and limits of agreement for DTI metrics using test-retest ...
Bland-Altman and ICC analysis using a P-value of 0.05 for statistical significance....
Correlations of mean diffusivity (MD), axial diffusivity (AD), and radial diffusivity (RD) were strong and significant in gray (ICC > 0.95) and white matter (ICC > 0.95) between standard vs. nested cu...
A nested cubes diffusion gradient table produces tensor-based and dynamic diffusion measurements in a single acquisition....
2 TECHNICAL EFFICACY: Stage 1....
